ORD 476ORDINANCE NO. 476
AN ORDINANCE OF THE CITY OF LA QUINTA,
CALIFORNIA, AMENDING THE LA QUINTA MUNICIPAL
CODE TITLE 8, CHAPTER 8.13, UPDATING THE CITY'S
WATER EFFICIENT LANDSCAPING ORDINANCE
WHEREAS, on September 28, 2006, the Governor of the State of California,
Arnold Schwarzenegger, signed Assembly Bill 1881, requiring that every city in
California either adopt the State Model Water -Efficient Landscape Ordinance or a
landscape ordinance which is at least as effective in conserving water; and
WHEREAS, the California Office of Administrative Law (OAL) approved an
updated Model Water Efficient Landscape Ordinance (MWELO) on September 10,
2009; and
WHEREAS, the City Council of the City of La Quinta recognizes that the
conservation of available water resources is essential to the future health and
welfare of the community; and
WHEREAS, the City has, from time to time, made amendments to the
Municipal Code to address important issues and changes in circumstances; and
WHEREAS, the Planning Commission of the City of La Quinta, California,
reviewed this item at their meeting held on the 10' of November 2009,
recommending approval of the proposed amendment to Title 8, Chapter 8.13, the
City's Water Efficient Landscaping Ordinance; and
WHEREAS, the City Council considered the evidence at their meeting held on
the 15`h of December 2009, and finds that the reduction of water use in
landscaping will contribute significantly to the conservation of our water resources
without impacting the quality of landscaping prevalent in the City.
NOW THEREFORE, BE IT RESOLVED, that the City Council of the City of La
Quinta does ordain as follows:
SECTION 1. Title 8, Chapter 8.13 of the City of La Quinta Municipal Code is
amended as identified in the attached Exhibit 1.
SECTION 2. ENVIRONMENTAL. The Planning Department has determined that the
Amendments to the Municipal Code are exempt pursuant to Section 15061(B)(3)
and Section 15307 of the Guidelines for Implementation of the California
Environmental Quality Act. The Ordinance will not have a negative effect on the
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 2
environment in that it will result in a reduction in the City's overall water usage
while allowing for the continued high quality of development in the City.
SECTION 3. SEVERABILITY. The provisions of this Ordinance shall be severable,
and if any clause, sentence, paragraph, subdivision, section, or part of this
Ordinance shall be adjudged by any court of competent jurisdiction to be invalid,
such judgment shall not affect, impair, or invalidate the remainder thereof, but shall
be confined in its operation to the clause, sentence, paragraph, subdivision,
section, or part thereof directly involved in the controversy in which such judgment
shall have been rendered.
SECTION 4. LEGAL CONSTRUCTION. The provisions of this Ordinance shall be
construed as necessary to effectively carry out its purposes, which are hereby
found and declared to be in furtherance of the public health, safety, and welfare.
SECTION 5. EFFECTIVE DATE. This Ordinance shall take full force and effect and
be in force 30 days after passage.
SECTION 6. POSTING: The City Clerk shall cause this Ordinance to be posted in at
least three public places designated by resolution of the City Council, shall certify
to the adoption and posting of this Ordinance, and shall cause this Ordinance and
its certification, together with proof of posting to be entered into the Book of
Ordinances of the City of La Quinta.
PASSED, APPROVED and ADOPTED by the City Council of the City of La
Quinta at a regular meeting thereof held on the 5t" day of January 2010, by the
following vote:
AYES:
NOES:
ABSENT:
F-R-MW "I
' N N
Dv�
DON ADO PH, M yor
City of La Quinta California
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 3
ATTEST:
VERONICA MONTECINO, City Clerk
City of La Quinta, California
S_111,Z•PI4 DIUV7 • • -
City
Ordinance No. 476'
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 4
CHAPTER 8.13
EXHIBIT 1
WATER EFFICIENT LANDSCAPING AND IRRIGATION SYSTEM DESIGN
Sections:
8.13.010 Purpose and Intent
8.13.020 Definitions I
8.13.030 Provisions for New or Rehabilitated Landscapes
8.13.040 Provisions for Existing Landscapes
8.13.050 Appeals
8.13.060 Effective Date
Chapter 8.13 WATER EFFICIENT LANDSCAPING
8.13.010 Purpose and intent.
A. The purpose of this chapter is to establish effective water efficient landscape requirements
for newly installed and rehabilitated landscapes. It is also the purpose of this ordinance to
implement the requirements of the California Code of Regulations Title 23, Waters Division 2,
Department of Water Resources Chapter 2.7, Model Efficient Landscaping Ordinance, and State of
California Water Conservation in Landscaping Act. Authority Cited: Section 65593, Government
Code, Reference: Sections 65591, 65593, 65596, Government Code.
B. It is the intent of the city council to promote water conservation through climate appropriate
plant material and efficient irrigation as well as to create a city landscape theme through enhancing
and improving the physical and natural environment. (Ord. 392 § 3 (Exh. A)(part), 2003: Ord. 220 §
1 (Exh. A)(part), 1993)
8.13.020 Definitions.
The words used in this chapter have the meanings set forth below:
"Application rate" means the depth of water applied to a given area, usually measured in inches per
hour. Also known as precipitation rate (sprinklers) or emission rate (drippers/microsprayers) in
gallons per hour.
"Applied water" means the portion of water supplied by the irrigation system to the landscape.
"Automatic controller" means a mechanical or solid-state timer, capable of operating valve stations
to set the days and length of time of a water application.
"Backflow prevention device" means a safety device used to prevent pollution or contamination of
the water supply due to the reverse flow of water from the irrigation system.
"Beneficial Use" means water used for landscape evapotranspiration
"Certified Landscape Irrigation Auditor" means a person certified to perform landscape irrigation
audits by an accredited academic institution, a professional trade organization or other program such
as the United States Environmental Protection Agency WaterSense irrigation auditor certification
program and Irrigation Association Certified Landscape Irrigation Auditor program.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 5
"Conversion Factor (0.62)" means a number that converts the maximum applied water allowance
from acre -inches per acre per year to gallons per square foot per year. The conversion factor is
calculated as follows:
(325,851 gallons/43,560 square feet)/12 inches = (0.62)
325,851 gallons = one acre-foot
43,560 square feet = one acre
12 inches = one foot
To convert gallons per year to one hundred cubic feet per year, the common billing unit for water,
divide gallons per year by seven hundred forty-eight. (748 gallons = 100 cubic feet)
"Desert Landscape" means a desert landscape using native plants spaced to look like a native
habitat utilizing plants native to the southwestern United States and northern Mexico or native to
other desert regions of the world but adapted to the Coachella Valley.
"Distribution Uniformity" is a measure of how evenly sprinklers apply water. The low -quarter
measurement method (DULQ) utilized in the irrigation audit procedure is utilized for the purposes of
these criteria. These criteria assume an attainable performance level of 75% DULQ for spray heads,
80% DULQ for rotor heads and 85% DULQ for recreational turf grass rotor heads.
"Drip Irrigation" means a method of irrigation where the water is applied slowly at the base of
plants without watering the open space between plants.
"Ecological restoration project" means a project where the site is intentionally altered to establish a
defined, indigenous, historic ecosystem.
"Effective precipitation" or "usable rainfall" means the portion of total natural precipitation that is
used by the plants. Precipitation is not a reliable source of water in the desert.
"Electronic Controllers" are time clocks that have the capabilities of multi -programming, water
budgeting and multiple start times.
"Emission Uniformity" is a measure of how evenly drip and microspray emitters apply water. The
low -quarter measurement method (EULQ) utilized in the landscape irrigation evaluation procedure is
utilized for the purposes of these criteria. These criteria assume 90% DULQ for drippers,
microsprays and pressure compensating bubblers.
"Emitter" means drip irrigation fittings that deliver water slowly from the system to the soil.
"Established landscape" means the point at which plants in the landscape have developed roots into
the soil adjacent to the root ball.
"Establishment period" means the first year after installing the plant in the landscape.
"Estimated annual applied water use" means the portion of the estimated annual total water use
that is derived from applied water. The estimated annual applied water use shall not exceed the
maximum applied water allowance.
"Estimated annual total applied water use" (total of all hydrozones) means the annual total amount
of water estimated to be needed by all hydrozones to keep the plants and water features in the
landscaped area healthy and visually pleasing. It is based upon such factors as the local
evapotranspiration rate, the size of the landscaped area, the size and type of the water feature, the
types of plants, and the efficiency of the irrigation system. The estimated annual total applied water
use shall not exceed the maximum applied water allowance.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 6
"ET adjustment factor" means a factor of 0.5 that, when applied to reference evapotranspiration,
adjusts for plant factors and irrigation efficiency, two major influences upon the amount of water
that needs to be applied to the landscape. A combined plant mix with a site -wide average of 0.38 is
the basis of the plant factor portion of this calculation. The irrigation efficiency for purposes of the
ET adjustment factor is 0.71. Therefore, the ET adjustment factor (0.5) = (0.38/0.71).
"Evapotranspiration, or ET" means the quantity of water evaporated from adjacent soil surfaces and
transpired by plants during a specific time.
"Flow rate" means the rate at which water flows through pipes and valves (gallons per minute or
cubic feet per second).
"Hardscape" means concrete or asphalt areas including streets, parking lots, sidewalks, driveways
and patios and decks.
"Head -to -Head Coverage" means one hundred percent sprinkler coverage of the area to be irrigated,
with maximum practical uniformity.
"High Flow Check Valve" means a valve located under/in a sprinkler head to stop the flow of water
if the spray head is broken or missing.
"Hydrozone" means a portion of the landscaped area having plants with similar water needs that are
served by a valve or set of valves with the same schedule. A hydrozone may be irrigated or
nonirrigated. For example, a naturalized area planted with native vegetation that will not need
supplemental irrigation once established is a nonirrigated hydrozone.
"Infiltration rate" means the rate of water entry into the soil expressed as a depth of water per unit
of time (inches per hour).
"Irrigation efficiency" means the measurement of the amount of water beneficially used divided by
the amount of water applied. Irrigation efficiency is derived from measurements and estimates of
irrigation system characteristics and management practices. The minimum irrigation efficiency for
purposes of this chapter is 0.71. Greater irrigation efficiency can be expected from well -designed
and maintained systems.
"Landscape irrigation audit" means a process to perform site inspections, evaluate irrigation
systems, and develop efficient irrigation schedules.
"Landscape Architect" means a person who holds a license to practice landscape architecture as per
the state of California Business and Professions Code, Section 5615.
"Landscape Contractor" means a person licensed by the state of California to construct, maintain,
repair, install, or subcontract the development of landscape systems.
"Landscaped area" means the entire parcel less the building footprint, driveways, non -irrigated
portions of parking lots, hardscapes such as decks and patios, and other nonporous areas. Water
features are included in the calculation of the landscaped area.
"Lateral line" means the water delivery pipeline that supplies water to the emitters or sprinklers from
the valve.
"Local water purveyor" shall mean the Coachella Valley Water District (CVWD)
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 7
"Main line" means the pressurized pipeline that delivers water from the water meter to the valve or
outlet.
"Maximum applied water allowance" means for design purposes, the upper limit of annual applied
water for the established landscaped area, as specified in Division 2, Title 23, California Code of
Regulations, Chapter 7, Section 702. It is based upon the area's reference evapotranspiration, the
ET adjustment factor, and the size of the landscaped area. The estimated applied water use shall
not exceed the maximum applied water allowance.
"Mined -land reclamation projects" means any surface mining operation with a reclamation plan
approved in accordance with the Surface Mining and Reclamation Act of 1975.
"Mulch" means any material such as gravel, small rocks, pebbles, decorative sand, decomposed
granite, bark, straw or other material left loose and applied to the soil surface for the beneficial
purpose of reducing evaporation.
"Native plants" means low water using plants that are indigenous to the Coachella Valley and lower
Colorado Desert region of California and Arizona.
"Operating pressure" means the manufacturer's recommended pressure at which a system of
sprinklers, bubblers, drippers or microsprayers is designed to operate.
"Overhead sprinkler irrigation systems" means those with high flow rates (pop -ups, impulse
sprinklers, rotors, etc.).
"Overspray" means the water which is delivered beyond the landscaped area, wetting pavements,
walks, structures, or other nonlandscaped areas.
"Pervious" means any surface or material that allows the passage of water through the material and
into the underlying soil.
"Plant factor" means a factor that when multiplied by reference evapotranspiration, estimates the
amount of water used by plants. For purposes of this chapter, the average plant factor of very low
water using plants ranges from 0.01 to 0.10, for low water using plants the range is 0.10 to 0.30,
for moderate water using plants the range is 0.40 to 0.60 and for high water using plants, the
range is 0.70 to 0.90. Reference: Water Use Classifications of Landscape Species III (WUCOLS III).
"Pressure Compensating (PC) Bubbler" means an emission device that allows the output of water to
remain constant regardless of input pressure. Typical flow rates for this type of bubbler range
between 0.25 gpm to 2.0 gpm.
"Pressure Compensating Screens/Devices" means small screens/devices inserted in place of
standard screens/devices that are used in sprinkler heads for radius and high pressure control.
"Qualified Professional" means a person who has been certified by their professional organization or
a person who has demonstrated knowledge and is locally recognized as qualified among landscape
architects due to longtime experience.
"Rain sensing device" means a system which automatically shuts off the irrigation system when it
rains.
"Record drawing" or "as-builts" means a set of reproducible drawings which show significant
changes in the work made during construction which are usually based on drawings marked up in
the field and other data furnished by the contractor.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 8
"Recreational area" means areas of active play or recreation such as sports fields, school yards,
picnic grounds, or other areas with intense foot traffic.
"Recreational turfgrass" means turfgrass that serves as a playing surface for sports and recreational
activities. Athletic fields, golf courses, parks and school playgrounds are all examples of areas
hosting recreational turfgrass.
"Recreational turfgrass ET adjustment factor" means a factor of 0.82 that, when applied to
reference evapotranspiration, adjusts for the additional stress of high traffic on recreational turfgrass
and the higher irrigation efficiencies of long range rotary sprinklers. These are the two major
influences upon the amount of water that needs to be applied to a recreational landscape. A mixed
cool/warm season turfgrass with a seasonal average of 0.7 is the basis of the plant factor portion of
this calculation. The irrigation efficiency of long range sprinklers for purposes of the ET adjustment
factor is 0.85. Therefore, the ET adjustment factor is 0.82 = 0.7/0.85.
"Recycled water," "reclaimed water" or "treated sewage effluent water" means treated or recycled
waste water of a quality suitable for nonpotable uses such as landscape irrigation; not intended for
human consumption.
"Reference evapotranspiration" or "ETo" means a standard measurement of environmental
parameters which affect the water use of plants. ETo is given in inches per day, month, or year, and
is an estimate of the evapotranspiration of a large field of cool -season grass that is well watered.
Reference evapotranspiration is used as a basis of determining the maximum applied water
allowances so that regional differences in climate can be accommodated. For purposes of this
chapter, the most current edition of the Coachella Valley Water District's Reference
Evapotranspiration Table shall be referenced.
"Rehabilitated landscape" means any re -landscaping project whose choice of new plant material
and/or new irrigation system components is such that the calculation of the site's estimated water
use will be significantly changed. The new estimated water use calculation must not exceed the
maximum applied water allowance calculated for the site using a 0.5 ET adjustment factor.
"Runoff" means water which is not absorbed by the soil or landscape to which it is applied and
flows from the planted area. For example, runoff may result from water that is applied at too great a
rate (application rate exceeds infiltration rate), when there is a severe slope or when water is
misapplied to hardscapes.
"Service line" means the pressurized pipeline that delivers water from the water source to the water
meter.
"Smart Controller" means weather based or soil moisture based irrigation controls that monitor and
use information about environmental conditions for a specific location and landscape (such as soil
moisture, rain, wind, the plants' evaporation and transpiration rates and, in some cases, plant type
and more) to decide for themselves when to water and when not to, providing exactly the right
amount of water to maintain lush, healthy growing conditions.
"Soil moisture sensing device" means a device that measures the amount of water in the soil.
"Soil texture" means the classification of soil based on the percentage of sand, silt and clay in the
soil.
"Sprinkler head" means a device which sprays water through a nozzle
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 9
"Static water pressure" means the pipeline pressure when water is not flowing.
"Station" means an area served by one valve or by a set of valves that operates simultaneously.
"Turf" means a surface layer of earth containing mowed grass with its roots. Perennial and annual
ryegrass are cool season grasses. Hybrid and common Bermuda grass, are warm season grasses.
"Valve" means a device used to control the flow of water in the irrigation system.
"Water conservation concept statement" means a one -page checklist and a narrative summary of
the project.
"Water feature" means any water applied to the landscape for nonirrigation decorative purposes.
Fountains, streams, ponds and lakes are considered water features. Water features use more water
than efficiently irrigated turf grass and are assigned a plant factor value of 1.1 for a stationary body
of water and 1.2 for a moving body of water.
Note: Section 65594, Government Code. Reference: Section 65597, Government Code. (Ord. 392
§ 3 (Exh. A)(part), 2003: Ord. 220 § 1 (Exh. A)(part), 1993)
8.13.030 Provisions for new or rehabilitated landscapes.
A. APPLICABILITY.
1. Except as provided in subsection (A)(3) of this section, this section shall apply to:
a. All new construction and rehabilitated landscaping for private, public, commercial and
governmental development projects; and
b. All new construction and rehabilitated landscaping in single-family tracts and multi -family
projects.
2. Projects subject to this section shall conform to the provisions in this section.
3. This section shall not apply to:
a. Resident homeowner -provided and/or homeowner -hired landscaping at single-family
residential projects with a total project landscape area less than 5,000 square feet;
b. Homeowner -provided landscaping within individually -maintained patio areas, courtyards, or
private gardens at a condominium, townhome, or similar multifamily project;
c. Registered local, state, or federal historic sites;
d. Ecological restoration projects that do not require a permanent irrigation system;
e. Mined -land reclamation projects that do not require a permanent irrigation system;
f. Plant collections, as part of botanical gardens and arboretums open to the public.
B. FINAL LANDSCAPING PLAN APPLICATION SUBMITTAL PACKAGE.
1. Each Final Landscaping Plan submittal shall include the following elements:
a. Water conservation concept statement;
b. Calculation of the maximum applied water allowance;
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 10
c. Calculation of the estimated applied water use;
d. Calculation of the estimated total water use;
e. Landscape design plan;
f. Irrigation design plan;
g. Grading design plan; and
h. Soil analysis.
2. Five copies of the Final Landscaping Plan submittal conforming to this chapter shall be
submitted to the city. No permit shall be issued until the city and the local water purveyor reviews
and approves the landscape documentation package. Prior to preparation and submission of the
Final Landscaping Plan submittal, with the exception of rehabilitated or home -owner provided
landscaping, the preliminary landscape design shall be approved by the planning commission.
3. A copy of the approved Final Landscaping Plan submittal shall be provided to the property
owner or site manager along with the record drawings and any other information normally
forwarded to the property owner or site manager.
C. ELEMENTS OF FINAL LANDSCAPING PLAN SUBMITTAL.
1. Water Conservation Statement and Landscape Worksheet.
a. Water Conservation Concept Statement. Each landscape documentation package shall
include a cover sheet, referred to as the water conservation statement, an example of which
can be obtained from either the Planning Department or the Coachella Valley Water District. It
serves as a checklist to verify that the elements of the landscape documentation package have
been completed and has a narrative summary of the project.
b. Water Efficient Landscape Worksheet. Each landscape documentation package shall include
a Water Efficient Landscape Worksheet, an example of which may be obtained from either the
Planning Department or the Coachella Valley Water District. The Water Efficient Landscape
Worksheet serves as a checklist to verify that the elements of the landscape documentation
package have been completed and has a narrative summary of the project.
i. The Water Efficient Landscape Worksheet shall contain a hydrozone information table
and a water budget calculation for the Final Landscaping Plans. For the calculation of the
Maximum Applied Water Allowance and the Estimated Total Water Use, the project
applicant shall refer to the most current localized ETo value from the Coachella Valley
Water District's Reference Evapotranspiration Table, a copy of which may be obtained
from either the Planning Department or the Coachella Valley Water District.
ii. Water budget calculations shall adhere to the following requirements:
(A) The plant factor used shall be from the "Water Use Classifications of Landscape
Species III" (WUCOLS III), prepared by the University of California Cooperative Extension
and California Department of Water Resources. The plant factors range from 0 to 0.3 for
the low use plants, from 0.4 to 0.6 for the moderate use plants, from 0.7 to 1.0 for the
high use plants and 1.1 to 1.2 for water features.
(B) All water features shall be included in the 1.1 to 1.2 hydrozone and temporary
irrigated areas shall be included in the low water use hydrozone.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 11
2. The Annual Maximum Applied Water Allowance.
a. A project's annual maximum applied water allowance shall be calculated using the following
formula:
MAWA =
(ETo) (0.5) (LA) (0.62) where:
MAWA =
Maximum applied water allowance (gallons per year)
ETo =
Reference evapotranspiration (i.e., seventy-five inches per year)
0.5 =
ET adjustment factor
LA =
Landscaped area (square feet)
0.62 =
Conversion factor (to gallons per square foot)
b. An example calculation of the annual maximum applied water allowance is:
Project site: Landscape area of fifty thousand square feet in Zone No. 3a of the Coachella Valley
ETo Map.
MAWA = (ETo) (0.5) (LA) (0.62)
(75.0 inches) (0.5) (50,000 square feet) (0.62)
Maximum applied water allowance = 1,162,500 gallons per year, 1,554 hundred -cubic -feet per
year (billing units), 3.56 acre feet/acre per year or 42.7 inches of water per year.
3. Estimated Annual Applied Water Use.
a. The annual estimated applied water use shall not exceed the annual maximum applied water
allowance.
b. A calculation of the estimated annual applied water use shall be submitted with the
landscape documentation package.
C. For the calculation of the Maximum Applied Water Allowance and Estimated Total Water
Use, the project applicant shall refer to the localized ETo value on the current Coachella Valley
ETo Map, prepared by the Coachella Valley Water District.
d. The estimated annual total water use for each hydrozone is calculated from the following
formula:
EWU (hydrozones) _ (ETo) (PF) (HA) (0.62)/748
(in 100 cubic feet) (IE)
EWU (hydrozone) = Estimated water use (gallons per year)
ETo = Reference evapotranspiration (i.e., ETo Zone 3a —seventy-five inches per year)
PF = Plant factor (see definitions)
HA = Hydrozone area (square feet)
(0.62) = Conversion factor
(IE) = Irrigation efficiency (see definitions)
748 = Conversion to billing units lone hundred cubic feet = 748 gallons = 1 CVwD
billing unit)
4. Estimated Annual Total Water Use. A calculation of the estimated annual total hydrozone water
use shall be submitted with the Final Landscaping Plan submittal. The estimated annual total water
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 12
use for the entire landscaped area equals the sum of the estimated annual water use (EWU) of all
hydrozones in that landscaped area.
5. Landscape Design Plan. A landscape design plan meeting the following requirements shall be
submitted as part of the Final Landscaping Plan submittal.
a. Plant Selection and Grouping
i. Any plants may be used in the landscape, providing the estimated annual applied water
use recommended does not exceed the maximum annual applied water allowance and that
the plants meet the specifications set forth in this section.
ii. Plants having similar water use shall be grouped together in distinct hydrozones.
iii. Plants shall be selected appropriately based upon their adaptability to the climate,
geologic, and topographical conditions of the site. Protection and preservation of native
species and natural areas is encouraged. The planting of trees is encouraged whenever it is
consistent with the other provisions of this chapter.
iv. A landscape design plan for projects in fire -prone areas shall address fire safety and
prevention. A defensible space or zone around a building or structure is required per Public
Resources Code Section 4291(a) and (b). Avoid fire -prone plant materials and highly
flammable mulches.
V. The use of invasive and/or noxious plant species is strongly discouraged. Applicants
should consult the Invasive Plant Inventory prepared by the California Invasive Plant Council
prior to the selection of any plant species for landscaping.
vi. Applicants shall consult the most current list of prohibited and restricted plant species
prepared by the Riverside County Agricultural Commissioner prior to the selection of any
plant species for landscaping. Restricted plant species shall be approved or cleared by the
Agricultural Commissioner and obtained from an authorized local supplier.
vii. The architectural guidelines of a common interest development, which include
community apartment projects, condominiums, property owners associations, planned
developments, and stock cooperatives, shall not prohibit or include conditions that have the
effect of prohibiting the use of low-water use plants as a group.
b. Water Features.
Recirculating water shall be used for decorative water features
ii. Water features shall be appropriately sized and designed for functional and recreational
purposes in conjunction with recreational amenities, placed at a location visible from
adjacent residential or commercial uses, and serve a functional purpose such as storm water
retention, interactive play, irrigation storage, and/or wildlife habitat.
iii. All water features shall be replenished by a non -potable water supply unless otherwise
conditioned or approved by the Planning Commission. Where available, recycled water shall
be used as a source for decorative water features.
iv. Surface area of a water feature shall be included in the high water use hydrozone area
of the water budget calculation.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 13
c. Landscape Design Plan Specifications. The Final Landscaping Plans shall be designed in
accord with the requirements of the local water purveyor. The landscape design plan shall be
drawn on 36 inch -by 24-inch project base sheets at a scale that accurately and clearly
identifies:
i. Designation of hydrozones, including the Total Estimated Annual Applied Water Use for
each major plant group hydrozone and water feature hydrozone Of water features have been
approved).
ii. Landscape materials, trees, shrubs, groundcover, turf and other vegetation. Planting
symbols shall be clearly drawn and plants labeled by botanical name, common name, water
use classification, container size, spacing and quantities of each group of plants indicated;
iii. Property lines, tract name, tract number or parcel number, and street names;
iv. Streets, driveways, walkways and other paved areas;
v. Pools, ponds, water features, fences and retaining walls;
vi. Existing and proposed buildings and structures including elevation, if applicable;
vii. Location of all overhead and underground utilities;
viii. Natural features including but not limited to rock outcroppings, existing trees and
shrubs that will remain;
ix. Tree staking, plant installation, soil preparation details, and any other applicable planting
and installation details;
x. A calculation of the total landscaped area; and
xi. Designation of recreational turf areas.
d. Design and Placement of Turf.
i. Turf shall be placed within functional and accessible recreational areas. Turf placement is
discouraged at locations adjacent to perimeter streets and sidewalks and those locations
having limited visibility and/or pedestrian activity.
ii. All typical landscaping plans for prototypical residential units (tract homes) shall include
a no -turf option.
iii. Long, narrow or irregularly shaped turf areas shall not be designed because of the
difficulty in irrigating uniformly without overspray onto hardscaped areas, streets, and
sidewalks. Landscape areas less than 8 feet in width shall not be designed with turf. Turf
will be allowed in these areas only if irrigation design reflects the use of subsurface irrigation
or a surface flow/wick irrigation system.
iv. Turf areas irrigated with spray/rotor systems must be set back at least 24 inches from
curbs, driveways, sidewalks or any other area that may result in runoff of water onto
hardscape. An undulating landscape buffer area created by the setback shall be designed
with rocks, cobble or decomposed granite and/or can be landscaped with drip irrigated
shrubs/accents or covered with a suitable ground cover.
Ordinance No. 476
Amending Title 8, Chapter a.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 14
v. Turf is prohibited on slopes greater than 25% where the toe of the slope is adjacent to
an impermeable hardscape and where 25% means 1 foot of vertical elevation change for
every 4 feet of horizontal length (rise divided by run x 100 = slope percent).
vi. Turf grass coverage shall be limited to no more than 50% (fifty percent) of any
project's total landscaped area.
e. Design and placement of Groundcover and Mulch.
i. The use of a soil covering mulch or a mineral groundcover of a minimum two-inch depth
to reduce soil surface evaporation is required around trees, shrubs, and on non -irrigated
areas. The use of boulders and creek stones shall be considered to reduce the total
vegetation area. These areas have should have enough shade to avoid reflected or retained
heat.
ii. Stabilizing mulching products shall be used on slopes.
iii. Soil amendments shall be incorporated according to recommendations of the soil report
and what is appropriate for the plants selected.
f. Stormwater best management practices.
i. The landscaping plans shall identify the location and installation details of any applicable
stormwater best management practices that encourage on -site retention and infiltration of
stormwater. Stormwater best management practices are strongly encouraged in the
landscape design plan and examples include, but are not limited to:
(A) Infiltration beds, swales, and basins, that allow water to collect and soak into the
ground;
(B) Constructed wetlands and retention ponds that retain water, handle excess flow,
and filter pollutants;
(C) Pervious or porous surfaces (e.g., permeable pavers or blocks, pervious or porous
concrete, etc.) that minimize runoff; and
(D) Any applicable rain harvesting or catchment technologies used (e.g., rain gardens,
cisterns, etc.).
ii. All stormwater best management practices identified on the Final Landscaping Plans
shall be prepared by the landscape architect in conjunction with the Engineer of Record
preparing the Water Quality Management Plan, grading plans, and other related engineering
plans.
6. Irrigation Design Plan.
a. For the efficient use of water, an irrigation system shall meet all the requirements listed in
this section and the manufactures recommendations. The irrigation system and its related
components shall be planned and designed to allow for proper installation, management, and
maintenance. An irrigation design plan meeting the following criteria shall be submitted as part
of the Final Landscaping Plan submittal.
b. Separate landscape water meters shall be installed for all projects except single family
homes. When irrigation water is from a well, the well shall be metered. The irrigation design
plan shall be drawn on project base sheets. It should be on separate pages from, but use the
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 15
same format as, the landscape design plans. The irrigation system specifications shall
accurately and clearly identify the following:
i. Specifications for Irrigation Design.
(A) Control valves, manufacturer's model number, size and location.
(B) Irrigation head manufacturer's model number, radius, operating pressure, gallons
per minute/gallons per hour (gpm/gph) and location.
(C) Piping type, size and location.
(D) Power supply/electrical access and location.
(E) Plan scale and north arrow on all sheets.
(F) Irrigation installation details and notes/specifications.
(G) Graphic scaling on all irrigation design sheets.
(H) The irrigation system shall be automatic, constructed to discourage vandalism, and
simple to maintain. Irrigation equipment shall be screened from view when
installed adjacent to pedestrian areas and public rights -of -way.
(1) All equipment shall be of proven design with local service available.
Q Control valves shall be rated at 200 psi.
(K) Visible sprinklers near hardscape shall be of pop up design.
(L) All heads should have a minimum number of wearing pieces with an extended life
cycle.
(M) Sprinklers, drippers, valves, etc., must be operated within manufacturer's
specifications.
(N) Manual shut-off valves (such as a gate valve, ball valve, or butterfly valve) shall be
required, as close as possible to the point of connection of the water supply, to
minimize water loss in case of an emergency (such as a mainline break) or
routine repair.
(0) High flow sensors that detect and report high flow conditions created by system
damage or malfunction are recommended.
(P) The following statement "I have complied with the criteria of the ordinance and
have applied them accordingly for the efficient use of water in the irrigation
design plan." shall be identified on the irrigation plans and include the landscape
architect's signature.
ii. Specifications for Irrigation Efficiency. The minimum irrigation efficiency shall be 0.71
(71 %). Greater irrigation efficiencies are expected from well -designed and maintained
systems. The following are required:
(A) Design spray head and rotor head stations with consideration for worst wind
conditions. Close spacing and low -angle nozzles are required in high and
frequent wind areas (Coachella Valley Water District ETo Zone No. 5).
(B) Spacing of sprinkler heads shall not exceed manufacturer's maximum
recommendations for proper coverage. The plan design shall show a minimum
of 0.75 (75%) distribution uniformity.
(C) Only irrigation heads with matched precipitation rates shall be circuited on the
same valve.
(D) Valve circuiting shall be designed to be consistent with hydrozones.
(E) Individual hydrozones that mix plants that are moderate and low water use may be
allowed if the plant factor calculation is based on the proportions of the
respective plant water uses and their plant factor, or if the plant factor of the
higher water using plant is used for the calculations.
(F) Individual hydrozones that mix high and low water use plants shall not be
permitted.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 16
(G) On the landscape design plan and irrigation design plan, hydrozone areas shall be
designated by number, letter, or other designation. On the irrigation design plan,
designate the areas irrigated by each valve, and assign a number to each valve.
Use this valve number in the hydrozone information table. This table can assist
with pre inspection and final inspection of the irrigation system, and
programming the controller.
iii. Irrigation System Design
(A) Point of connection or source of water and static water pressure.
(B) Meter location and size (where applicable).
(C) Pump station location and pumping capacity (where applicable).
(D) Reduced pressure backflow prevention devices shall be installed behind meter at
curb by the District.
(E) Show location, station number, size and design gpm of each valve on plan.
(F) Smart Controller details shall be specified for all projects. This includes climate
based or sensor based controllers, which can automatically adjust for local
weather and/or site conditions.
(G) High flow check valves shall be installed in or under all heads adjacent to street
curbing, parking lots and where damage could occur to property due to flooding,
unless controllers with flow sensor capabilities are specified that can
automatically shut off individual control valves when excess flow is detected.
(H) Pressure compensating screens/devices shall be specified on all spray heads to
reduce radius as needed to prevent overthrow onto hardscape and/or to control
high pressure misting.
(1) All irrigation systems shall be designed to avoid runoff onto hardscape from low
head drainage, overspray and other similar conditions where water flows onto
adjacent property, nonirrigated areas, walks, roadways or structures.
(J) Rotor type heads shall be set back a minimum of 4 feet from hardscape.
(K) The use of drip, microirrigation or pressure compensating bubblers or other systems
with efficiencies of 90 percent or greater is required for all shrubs and trees.
Small, narrow (less than 8 feet), irregularly shaped or sloping areas shall be
irrigated with drip, microspray or PC (pressure compensating) bubbler heads.
(L) Trees in turf areas shall be on a separate station to provide proper deep watering.
iv. Street median irrigation system design
(A) No overhead sprinkler irrigation system shall be installed in median strips or in
islands.
(B) Median islands or strips shall be designed with either a drip emitter to each plant or
subsurface irrigation. PC bubblers are acceptable for trees only.
v. Drip Irrigation Design
(A) The drip system must be sized for mature -size plants.
(B) The irrigation system should complete all irrigation cycles during peak use in about
12 hours. Normally, each irrigation controller should not have more than four
drip stations that operate simultaneously.
(C) Field installed below ground pipe connections shall be threaded PVC or glued PVC.
Surface laid hose and tubing is not allowed. Microtube distribution is not
allowed unless emitter/manifold is installed in an access box. Microtubing must
be buried at least 6 inches below grade and the end of microtubing must be
secured by a stake. The maximum length of microtubing must be specified on
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 17
the plan to be 10 feet or less.
(D) Proportion gallons per day per plant according to plant size. The following sizing
chart is for peak water use. The low to high end of the range is according to the
relative water requirements of the plants. The low end is for desert natives and
the high end is for medium water use type plants.
Size of Plant
Gallons
Per Day
Large trees (over 30-foot diameter)
58+ to
97+
Medium trees (about 18-foot diameter)
21 to
35
Small trees/large shrubs (9-foot diameter)
6 to
10
Medium shrubs (3.5-foot diameter)
.8 to
1.3
Small shrubs/groundcover
.5 or
less
(E) Plants with widely differing water requirements shall be valved separately. As an
example, separate trees from small shrubs and cactus from other shrubs.
Multiple emitter point sources of water for large shrubs and trees must provide
continuous bands of moisture from the root ball out to the mature drip line plus
20 percent of the plant diameter.
(F) Most plants require 50 percent or more of the soil volume within the drip line to be
wetted by the irrigation system.
vi. Recycled Water Specifications
(A) When a site has recycled water available or is in an area that will have recycled
water available as irrigation water, the irrigation system shall be installed using
the industry standard purple colored or marked "Recycled Water Do Not Drink"
on pipes, valves and sprinkler heads.
(B) The backup groundwater supply (well water or domestic water) shall be metered.
Backup supply water is only for emergencies when recycled water is not
available.
(C) Recycled water users must comply with all county, state and federal health
regulations. Cross connection control shall require a 6-inch air gap system or a
reduced pressure backflow device. All retrofitted systems shall be dye tested
before being put into service.
(D) Where available, recycled water shall be used as a source for decorative water
features.
(E) Sites using recycled water are not exempted from the Maximum Water Allowance,
prescribed water audits or the provisions of these criteria.
(F) A Recycled Water Checklist shall be submitted upon submittal of the first plan
check of the Final Landscape Plan submittal, an example of which may be
obtained from the Planning Department or Coachella Valley Water District.
vii. Non -potable Irrigation Water Specifications
(A) When a site is using non -potable irrigation water that is not recycled water (from
an on -site well, Bureau of Reclamation irrigation lines, or from canal water) all hose bibs
shall be loose key type and quick coupler valves shall be of locking type with non -
potable markings or signs to prevent possible accidental drinking of this water.
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 18
(B) Sites using non -potable irrigation water are not exempted from the Maximum
Annual Applied Water Allowance, prescribed water audits or the provisions of these
criteria.
7. Groundwater Water Specifications
a. Sites using groundwater irrigation water from wells are not exempted from the Maximum
Annual Applied Water Allowance, prescribed water audits or the provisions of these criteria.
8. Grading Design Plan.
a. For efficient use of water, grading of a project site shall be designed to minimize soil
erosion, runoff, and water waste. A landscape grading plan shall be submitted as a part of the
Final Landscaping Plan submittal package. A comprehensive grading plan prepared by a civil
engineer in coordination with the landscape architect satisfies this requirement.
b. The grading design plan shall indicate finished configurations and elevations of the
landscaped area, including the height of graded slopes, drainage patterns, pad elevations, finish
grade, and stormwater retention improvements, if applicable.
c. To prevent excessive erosion and runoff, it is highly recommended that project applicants:
i. Grade so that all irrigation and normal rainfall remains within property lines and does not
drain on to non -permeable hardscapes;
ii. Avoid disruption of natural discharge drainage patterns and undisturbed soil; and
iii. Avoid soil compaction in landscape areas.
d. The grading design plan shall contain the following statement: "I have complied with the
criteria of the ordinance and applied them accordingly for the efficient use of water in the
grading plan."
e. Slopes greater than 25% shall not be irrigated with an irrigation system with a precipitation
rate exceeding .75 inches per hour. This restriction may be modified if the landscape designer
specifies an alternative design or technology, as part of the Final Landscaping Plan submittal,
and clearly demonstrates no runoff or erosion will occur. Prevention of runoff must be confirmed
during an irrigation audit.
f. All grading must retain normal stormwater runoff and provide for an area of containment. All
irrigation water must be retained within property lines and not allowed to flow into public streets
or into the public right-of-way. Where appropriate, a simulated dry creek bed may be used to
convey storm drainage into retention areas. A drywell shall be installed if the retention basin is
to be used as a recreational area.
g. Avoid mounded or sloped planting areas that contribute to runoff onto hardscape. Sloped
planting areas above a hardscape area shall be avoided unless there is a drainage swale at toe of
slope to direct runoff away from hardscape.
h. Median islands must be graded to prevent stormwater and excess irrigation runoff
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 19
9. Soil Analysis.
a. In order to reduce runoff and encourage healthy plant growth, a soil management report
shall be completed by the project applicant, or their designated agent, as follows:
i. Submit soil samples to a laboratory for analysis and recommendation;
ii. Soil sampling shall be conducted in accordance with laboratory protocol, including
protocols regarding adequate sampling depth for the intended plants;
iii. The soil analysis shall include:
(A) Determination of soil texture, indicating the available water holding capacity.
(B) An appropriate soil infiltration rate (either) measured or derived from soil
texture/infiltration rate tables. A range of infiltration rates shall be noted where
appropriate.
(C) Measure of pH, total soluble salts, and percent organic matter.
iv. The soil analysis report shall be submitted to the City as part of the Final Landscaping
Plan;
v. The soil analysis report shall be made available, in a timely manner, to the professionals
preparing the landscape design plans and the irrigation plans to make any adjustments to the
design plans.
vi. The project applicant or their designated agent shall submit documentation verifying
implementation of the soil analysis report recommendations to the local agency with the
Certificate of Completion prior to final inspection.
10. Certification.
a. An approval stamp and/or signature block from the Coachella Valley Water District and
Riverside County Agricultural Commissioner shall be identified on the Final Landscaping Plans.
Approval of Final Landscaping Plans from any outside agencies, if necessary, shall be obtained
by the applicant prior to final approval of the plans by the planning director.
D. PUBLIC EDUCATION.
1. Publications.
a. The city, county or water district will, upon request, provide information to the public
regarding the design, installation, and maintenance of water efficient landscapes.
b. Information about the efficient use of landscape water shall be provided to water users
throughout the community.
c. The landscape architect will provide a site -specific landscape irrigation package for the
homeowner or irrigation system operator. The package will include a set of drawings, a
recommended monthly irrigation schedule and a recommended irrigation system maintenance
schedule.
d. Irrigation Schedules. Irrigation schedules satisfying the following conditions shall be
submitted as part of the landscape irrigation package:
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 20
i. An annual irrigation program with monthly irrigation schedules shall be required for the
plant establishment period, for the established landscape, and for any temporarily irrigated
areas. The irrigation schedule shall:
(A) Include run time (in minutes per cycle), suggested number of cycles per day, and
frequency of irrigation for the station; and
(B) Provide the amount of applied water (in hundred cubic feet) recommended on a
monthly and annual basis.
(C) Whenever possible, irrigation scheduling shall incorporate the use of
evapotranspiration data such as those from the California Irrigation Management
Information System (CIMIS) weather stations to apply the appropriate levels of
water for different climates.
(D) Whenever possible, landscape irrigation shall be scheduled between ten p.m. and
five a.m. to avoid irrigating during times of high wind or high temperature.
e. Maintenance Schedules. A regular maintenance schedule satisfying the following conditions
shall be submitted as part of the landscape documentation package:
i. Landscapes shall be maintained to ensure water efficiency. A regular maintenance
schedule shall include but not be limited to checking, adjusting, cleaning and repairing
equipment; resetting the automatic controller, aerating and dethatching turf areas;
replenishing mulch; fertilizing; pruning; and weeding in all landscaped areas.
li. Repair of irrigation equipment shall be done with the originally specified materials or their
approved equivalents.
2. Information shall be provided about designing, installing, and maintaining water efficient
landscapes.
E. APPROVAL OF LANDSCAPING
1. Final Landscaping Plans shall be approved by the Planning Director. Median landscaping plans
located within private streets and public rights -of -way shall be reviewed by the Public Works
Department and approved by the Planning Director.
2. Planning staff shall field inspect all completed landscaping for compliance with the approved
Final Landscaping Plans and Site Development Permit. Public Works staff shall inspect all median
landscaping for compliance with the approved Final Landscaping Plans.
3. Prior to inspection, the landscape architect shall provide the planning department a copy of the
official Certificate of Completion. The Certificate of Completion shall include all of the following:
a. Project information identifying the project's location, date of installation, and contact
information for all persons involved;
b. Certification by either the signer of the landscape design plan, the signer of the irrigation
design plan, or the licensed landscape contractor that the landscape project has been installed
per the approved Final Landscaping Plans;
c. Irrigation scheduling parameters used to set the controller;
d. Landscape and irrigation maintenance schedule;
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010
Page 21
e. Irrigation audit report (if applicable);
f. Soil analysis report and documentation verifying implementation of soil report
recommendations; and
g. Any additional project information required by the City or local water purveyor.
4. Final Certificates of Occupancy may be authorized for issuance once the Final Landscaping
Plans have been approved, a Certificate of Completion has been submitted, and the landscaping and
irrigation installation has been inspected and approved by both the City and the local water
purveyor.
Note: Authority cited: Section 65593, 65594, Government Code. Reference: Section 65593,
65596, 64497. (Ord. 392 § 3 (Exh. A)(part), 2003: Ord. 220 § 1 (Exh. A)(part), 1993)
8.13.040 Provisions for existing landscapes.
A. Water Management. All existing landscaped areas, including golf courses, green belts,
common areas, multifamily housing, schools, businesses, public works, parks, and cemeteries may
be subject to a landscape irrigation audit at the discretion of the water purveyor if the water
purveyor has determined that the annual maximum applied water allowance has been exceeded. At
a minimum, the audit shall be conducted by a certified landscape irrigation auditor and shall be in
accordance with the California Landscape Irrigation Auditor Handbook, the entire document which is
hereby incorporated by reference. (See Landscape Irrigation Audit Handbook, Department of Water
Resources, Water Conservation Office (June, 1990, Version 5.5).).
B. Water Waste Prevention. Water waste resulting from inefficient landscape irrigation
including run-off, low -head drainage, overspray, or other similar conditions where water flows onto
adjacent property, nonirrigated areas, walks, roadways, or structures shall be prohibited. All broken
heads and pipes must be repaired within seventy-two hours of notification. Penalties for violation of
these prohibitions shall be in accord with administrative citation guidelines as outlined in Section
1.09.020.
Note: Authority cited: Section 65594, Government Code. Reference: Section 65597, Government
Code. (Ord. 392 § 3 (Exh. A) (part), 2003: Ord. 220 § 1 (Exh. A) (part), 1993)
8.13.050 Appeals.
Decisions made by the Planning Director or Public Works Director may be appealed by an applicant,
property owner(s), or designee(s) of any applicable project to the Planning Commission and
thereafter the City Council by an application in writing to the Planning Director and City Clerk of the
City Council respectively within fifteen days from the date of notification of decision. (Ord. 392 § 3
(Exh. A) (part), 2003: Ord. 220 § 1 (Exh. A) (part), 1993)
8.13.060 Effective date.
The ordinance codified in this chapter will become effective on February 5, 2010. All plans
approved after February 4, 2010 are subject to the provisions of this Chapter. (Ord. 392 § 3 (Exh.
A) (part), 2003)
Ordinance No. 476
Amending Title 8, Chapter 8.13
Water Efficient Landscaping
Adopted: January 5, 2010.
Page 22
STATE OF CALIFORNIA )
COUNTY OF RIVERSIDE ) ss.
CITY OF LA QUINTA )
I, VERONICA J. MONTECINO, City Clerk of the City of La Quinta, California, do
hereby certify the foregoing to be a full, true, and correct copy of Ordinance No.
476 which was introduced at a regular meeting on the 151h day of December 2009,
and was adopted at a regular meeting held on the 5`h day of January 2010, not
being less than 5 days after the date of introduction thereof.
I further certify that the foregoing Ordinance was posted in three places within the
City of La Quinta as specified in City Council Resolution No. 2006-115.
VERONICA J. MONTECINO, CMC, City Clerk
City of La Quinta, California
DECLARATION OF POSTING
I, VERONICA J. MONTECINO, City Clerk of the City of La Quinta, California, do
hereby certify that the foregoing ordinance was posted on the 1# day of January
2010, pursuant to Council Resolution.
"/z -Z�
VERONICA J. ONTECINO, CIVIC, City Clerk
City of La Quinta, California