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Water Efficiency: Long Term. October 15, 2021

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October 15, 2021

Water Efficiency:

Long Term

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• Tracking Per Capita Water Use

• Evaluating Long term Water Use Targets

• Prioritizing Long Term Demand Reductions

• Shift outreach from immediate drought response to establishing new sustainable water use practices

Overview

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3

System Wide per Capita Water Use 2000-2020

0 20 40 60 80 100 120 140 160 180

172,000 174,000 176,000 178,000 180,000 182,000 184,000 186,000 188,000 190,000 192,000 194,000

2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

GPC D

Po pul at io n

Population GPCD

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113

128

119

107

95 99

166

103

119 113

COTATI MMWD NMWD PETALUMA ROHNERT

PARK SANTA ROSA SONOMA VOMWD WINDSOR REGIONAL AVERAGE

Total GPCD

Regional Demand Comparison 2020 GPCD

Cotati MMWD NMWD Petaluma Rohnert Park Santa Rosa Sonoma VOMWD Windsor Regional Average

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Average of 2017, 2018, 2019 consumption from California DWR, based on annual reported data (eAR)

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0

San Gabriel Valley Water Company Lynwood City of McKinleyville Community Service District Golden State Water Company - Bell-Bell Gardens Golden State Water Company S San Gabriel Crescent City California Water Service Company Visalia Goleta Water District Marina Coast Water District Vallejo City Of Golden State Water Company Artesia Paramount City Of Vallejo City Of Morro Bay City of Valley Of The Moon Water District Olivehurst Public Utility District Montebello Land and Water Company Shafter City Of Sunnyslope County Water District California Water Service Company South San… Crescent City California Water Service Company Visalia California Water Service Company Salinas District Pittsburg City Of Seal Beach City of Valley County Water District Monterey Park City Of Arroyo Grande City of Golden State Water Company West Orange Rosamond Community Service District California American Water Company - Ventura… Vallejo City Of Twentynine Palms Water District Ceres City Of Gilroy City Of Manhattan Beach City of Huntington Beach City of Joshua Basin Water District Hesperia Water District City of Mesa Water District Marin Water San Dieguito Water District Contra Costa Water District Suburban Water Systems San Jose Hills Covina City of Lake Hemet Municipal Water District California Water Service Company Marysville Suburban Water Systems Whittier/La Mirada Suburban Water Systems Whittier/La Mirada California Water Service Company Los… Manteca City of Colton City of Monrovia City of Dinuba City of Folsom City of Fullerton City Of Lee Lake Water District California Water Service Company Chico District Hanford City of California Water Service Company Bear Gulch California Water Service Company Chico District Jurupa Community Service District Golden State Water Company San Dimas California American Water Company - Ventura… Poway City of Santa Margarita Water District California Water Service Company Visalia Calaveras County Water District California Water Service Company Palos Verdes Clovis City of Riverside Highland Water Company West Valley Water District California Water Service Company Oroville Yorba Linda Water District Discovery Bay Community Services District Roseville City of Banning City of Golden State Water Company - Cordova Folsom City of Santa Clarita Valley Water Authority Newhall… Santa Clarita Valley Water Authority Newhall… Bakersfield City Of Redding City of Montecito Water District Los Angeles County Waterworks District 29 -… Santa Clarita Valley Water Authority Newhall…

Total Per Capita - California

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Marin Water’s Conservation Spending Compares Favorably

Albuquerque Bernalillo County

Water Utility Authority

Colorado Springs

Utilities

El Paso Water

City of Grand Junction

City of Phoenix Water Services

Department

Salt Lake City Department of Public Utilities

Southern Nevada Water

Authority

Tucson Water

Washington County Water

Conservancy District

Marin Municipal

Water District

Annual Conservation

Budget $1,615,000 $850,000 $1,188,600 $13,500 $915,5333 $346,700 $15,831,200 $4,000,000 $643,543 $2,000,000

($8,000,000) Conservation Spending

($/capita) $2.45 $1.81 $1.51 $0.48 $0.56 $0.62 $7.00 $5.33 $3.88 $10.47

($41.88) Full-time Equivalent

Conservation Staff 8.5 6.25 10 0.5 5 1 20 4 5.75 6 (11)

Approx. total gpcd 132.9 167.1 130.0 187.8 167.4 193.1 201.1 119.1 286.3 128.1

Data Year 2015 2015 2013 2018 2017 2016 2017 2017 2015 2020

Approx. Population Served 658,238 470,513 787,208 28,215 1,648,611 316,402 2,262,962 750,000 153,000 191,000

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Establishing Long Term Water Use Targets

Reduction from 2020

GPCD

Per Capita Potable Water

Use (GPCD)

Annual Potable Water Use (AFY)

Cost ($/AF)

2020 2025 2030

0% 124 26,567 27,493 28,056 $745

10% 112 24,744 25,250 ~$2,200

20% 99 21,995 22,444 ~$3,500

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Currently Underway

• Prohibition on Non-Functional Turf (Nov 2021)

• System-wide AMI

o Projecting 6 – 9 months for implementation contracts

Additional Opportunities

• Establishing water use goals

• Leak Detection

o Customer side intervention

o District infrastructure (Enhanced leak detection, meter change program, pipe replacement, upgrade water supply meters, pressure management)

• Establish Water Budgets

o Targeted mailers to single-family residential customers o Informational mailers to all other customers

o Evaluate Water Budget Based Billing (2023)

• Implementation of Innovative Incentives Program

• New Development Codes

Prioritizing Long Term Demand Reductions

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• New Standards

o Showerhead: 1.5gpm  (currently 2.0gpm) o Pressure regulators: 50psi  (currently 60psi) o Lavatory Faucet: 0.5gpm  (currently 1.0gpm)

o Clothes Washer: ENERGY STAR certified, integrated water factor of no greater than 4.3  (currently “highest water efficiency standard”)

o Dishwasher: ENERGY STAR certified, up to 3.5 gallons per cycle  (currently no standard)

o Hose Bid: anti siphon valve, max flow of 4gpm  (currently no standard) o Non-Potable Irrigation System: non-potable irrigation water cisterns with a

specified minimum capacity (TBD), reduced-pressure backflow preventer, installation of native, drought-tolerant plants  (currently a graywater system is required)

o Front Yard Landscaping: Native and low water use plants  (currently limited to 25% of landscape area)

• Implementation through Retrofit on Resale

Update Residential Development Code

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Continued Outreach

• Community Conversations (webinars)  as needed

• Amplifying ally voices through social and traditional media

• Engaging grassroots groups

• Increase video content – second PSA, testimonials, trusted voices

• Direct-to-customer mailers (bills and standalone)

• Additional phases of comprehensive advertising

o Print, digital, bus backs, bus shelters, mall posters

• Cultural shift towards sustainable water use:

oRethinking landscape aesthetic

oCommunity norms of water-saving behavior

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• Monitor and Report Per Capita Water Use

• Prioritize Long Term Demand Reductions based on board feedback

Next Steps

References

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