Sonoma Water
Sonoma Water is a public regional water agency that supplies naturally filtered Russian River water and sanitation services to nine municipal contractors across Sonoma and Marin counties, serving over 600,000 residents through 79 miles of aqueduct infrastructure.
- Company typePrivate
- Founded1949
- HeadquartersSanta Rosa, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
What Sonoma Water does
Sonoma Water (legally Sonoma County Water Agency, doing business as Sonoma Water) is a public regional water agency founded in 1949 and headquartered in Santa Rosa, California, that supplies naturally filtered Russian River water to nine municipal contractors across Sonoma and Marin counties, serving over 600,000 residents. Distribution relies on 79 miles of underground aqueduct pipelines (16 to 54 inches in diameter), 18 steel storage tanks holding approximately 129 million gallons, seven booster stations, three groundwater wells, and the Mirabel and Wohler collector wells with 1,000–2,000 horsepower pumps and the Mirabel inflatable dam. Since 1995, the agency has also managed eight county sanitation zones serving roughly 22,000 residences and businesses, and it operates dual-purpose reservoirs (Lake Mendocino since 1959 at 118,000 acre-feet and Lake Sonoma since 1984 at 381,000 acre-feet), Warm Springs Dam, Spring Lake, Coyote Valley Dam, Matanzas Creek Reservoir, and over 80 miles of creeks under a stream maintenance program.
The agency's flagship technology is Forecast-Informed Reservoir Operations (FIRO), a flexible water management approach developed in cooperation with Scripps Institution of Oceanography's Center for Western Weather and Water Extremes, the U.S. Army Corps of Engineers, and NOAA. FIRO uses watershed monitoring and atmospheric-river forecasts to selectively retain or release water, enabling roughly 11,650 acre-feet of additional storage during flood control windows and producing approximately 130,000 acre-feet of cumulative water saved since 2014. The Advanced Quantitative Precipitation Information (AQPI) forecasting system extends this capability, and the biological monitoring program supports compliance with the Russian River Biological Opinion issued by the National Marine Fisheries Service.
Revenue is generated through two streams: wholesale water supply contracts with the nine municipal contractors and sanitation rates from the eight sanitation zones. Sonoma Water operates with a $256.2 million annual operating budget under State Water Resources Control Board Decision 1610 and four water rights permits (12947A, 12949, 12950, 16596). Pricing is established through multi-year service agreements with municipal contractors, with cost increases passed through to end consumers; one example is the 8.7 percent wholesale rate increase imposed on Rohnert Park in 2025. The agency is governed by an independent Board of Directors, employs between 101 and 250 staff, and has no outside equity investors.
Sonoma Water firmographics
Firmographics- Name
- Sonoma Water
- Legal name
- Sonoma County Water Agency
- Website
- https://sonomawater.org
- Company type
- Private
- Founded year
- 1949
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Sonoma Water is a public regional water agency that supplies naturally filtered Russian River water and sanitation services to nine municipal contractors across Sonoma and Marin counties, serving over 600,000 residents through 79 miles of aqueduct infrastructure.
- Ownership category
- akta.pro rank
Sonoma Water industry classification
Industry- Product category
- Water Utility Services
- NAICS
- Water Supply and Irrigation Systems (22131), Sewage Treatment Facilities (221320), Water, Sewage and Other Systems (2213)
- SIC
- Water Supply (4941)
- akta.pro primary industry
- Raw Water Conveyance & Transmission (Aqueducts, Mains, Pumping Stations) (EUANAAAB)
- akta.pro secondary industries
- Water Resources Administration (Watersheds, Rivers, Groundwater) (BPAIAMAE), Storage & Conveyance Structures (Reservoirs, Tanks, Culverts, Tunnels) (IMAFAGAE), Water & Wastewater Pipeline Construction (Mains, Force Mains, Interceptors) (IMAFAGAC)
Keywords
Where Sonoma Water is headquartered
LocationHeadquarters
- HQ city
- Santa Rosa
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Sonoma Water business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Infrastructure, Operations, Personnel, Technology or R&D, Supply Chain
Revenue model
- Wholesale Water Sales: Sonoma Water generates revenue through wholesale water supply contracts with nine cities and special districts in Sonoma and Marin counties. The agency delivers naturally filtered Russian River water to these contractors who provide drinking water to over 600,000 residents. Revenue is derived from water delivery charges as a regional wholesaler.
- Sanitation Services: In 1995, Sonoma Water assumed responsibility for managing county sanitation zones and districts providing wastewater collection and treatment, and recycled water distribution services for approximately 22,000 residences and businesses. Revenue generated through sanitation rates and fees.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Multi-year contract | Wholesale water supply pricing for municipal contractors |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels6 records
Sonoma Water product offering
Product offeringCore offering
Sonoma Water is a wholesale water agency that captures, treats, and delivers naturally filtered Russian River water through a 79-mile aqueduct transmission system to nine municipal contractors serving over 600,000 residents in Sonoma and Marin counties. The agency also provides flood protection infrastructure (dams, reservoirs, creeks), wastewater collection and treatment services to approximately 22,000 residences and businesses, recycled water production and distribution, and groundwater management under California's Sustainable Groundwater Management Act.
Product overview
Sonoma Water operates as a regional water management agency providing water supply, flood protection, sanitation, and groundwater management services. The core offering is its water transmission system delivering Russian River water to over 600,000 residents. Key products include Forecast-Informed Reservoir Operations (FIRO) for optimized water management, the Atmospheric Rivers Research Partnership with Scripps CW3E, Advanced Quantitative Precipitation Information (AQPI), groundwater banking, and recycled water production. The agency also provides sanitation services to approximately 22,000 residences and maintains extensive flood protection infrastructure.
Differentiator
Problem solved
Functional benefit
Quantifiable outcome
- 33,000 acre-feet of additional water storage in 2026 through FIRO operations
- +4 more outcomes
Companies that use Sonoma Water
Customer profileNamed customers9 records
Segments3 records
Ideal customer profiles2 records
Sonoma Water technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability4 records
Feature5 records
Sonoma Water partnerships and signals
Strategic signalPartnerships
14 partnerships are on record, tiered core, major and minor.
- Scripps Institution of Oceanography / Center for Western Weather and Water Extremes (CW3E)coreCooperative agreement to advance research in ocean science and meteorology. Partnership helps define the role of atmospheric rivers in filling Lake Mendocino and develops feasibility assessment for forecast-informed reservoir operations (FIRO). CW3E leads AR Reconnaissance program to improve forecast accuracy. Partnership is central to Sonoma Water's climate adaptation strategy.
- U.S. Army Corps of EngineerscoreUSACE is the federal partner for Lake Mendocino and Lake Sonoma flood control operations. Implemented new FIRO protocol at Lake Mendocino, updating the facility's water control manual for the first time since 2011. USACE determines flood control releases when lake levels are above water supply pools. Joint efforts on water control manuals and reservoir operations.
- National Oceanic and Atmospheric Administration (NOAA)coreNOAA supports atmospheric river research and forecasting through partnerships with Scripps CW3E. NOAA's Earth System Research Laboratory provides atmospheric river portal data. NOAA representatives participated in congressional briefings on atmospheric rivers and FIRO.
- Eel-Russian Project AuthoritycoreJoint powers authority created at end of 2023 to negotiate with PG&E regarding surrender of Potter Valley Project. Board consists of representatives from Mendocino County Inland Water and Power Commission, Sonoma Water, Sonoma County, and Round Valley Indian Tribes. Aims to secure water for Russian River and improve Eel River fisheries through dam removal and new diversion facilities.
- CalTroutmajorTrout conservation organization and co-proponent of revised Potter Valley Project proposal to PG&E. Coalition aims to remove Scott and Cape Horn Dams on Eel River and construct new diversion facility. Signed onto amended proposal in November 2023.
- Round Valley Indian TribesmajorTribal partner in Eel River Recovery MOU and Eel-Russian Project Authority. Pledged support for removal of two dams on Eel River to aid fisheries recovery and ensure water supply for Russian River communities. Partner in Potter Valley Project negotiations.
- Trout UnlimitedmajorConservation organization that signed onto amended Potter Valley Project proposal in November 2023. Partner in efforts to ensure proper dam removal and fish passage on Eel River.
- California Department of Fish and Wildlife (CDFW)majorState agency that pledged $18 million towards Eel River dam removal effort. Signatory to historic MOU on Eel River Recovery with California Trout and Round Valley Indian Tribes. Goal is to open over 288 miles of river for salmon runs.
- North Marin Water DistrictmajorRegional water district collaborating with Sonoma Water and Marin Municipal Water District on infrastructure projects including the Atmospheric River Capture initiative to enhance water storage and flood protection. Implementing advanced technologies such as FIRO and smart metering.
- Marin Municipal Water DistrictmajorMarin County water district collaborating with Sonoma Water and North Marin Water District on the Atmospheric River Capture initiative and advanced water management technologies including FIRO and smart metering for climate adaptation.
- City of PetalumamajorPartner in Aquifer Storage and Recovery (ASR) pilot project. City is launching ASR program to test storing treated drinking water in underground aquifers for dry period use. Initiative involves injecting water from Sonoma Water into Del Oro Well. Part of broader regional collaboration with groundwater sustainability agencies.
- Petaluma Valley Groundwater Sustainability AgencyminorGroundwater sustainability agency partnering with Sonoma Water and City of Petaluma on ASR pilot project and sustainable water management strategies for Petaluma Valley groundwater basin.
- Mendocino County Inland Water and Power CommissioncoreRepresented on Eel-Russian Project Authority board. Original co-proponent with Round Valley Indian Tribes and Sonoma Water of proposal to preserve water diversions through Potter Valley Project. Key stakeholder in Eel River dam removal negotiations.
- Humboldt CountymajorCounty that signed onto amended Potter Valley Project proposal in November 2023. Stakeholder in Eel River recovery efforts and dam removal discussions.
Scale indicators9 records
Recent moves6 records
Expansion highlights5 records
Sonoma Water competitors and assessment
Company assessmentDirect peers
- Contra Costa Water District: Contra Costa Water District serves 550,000 customers in Contra Costa County with wholesale and retail water service, including operation of the Contra Costa Canal and Rock Slough intake. It is comparable to Sonoma Water as a Bay Area water utility with similar conveyance and storage infrastructure.
- East Bay Municipal Utility District (EBMUD): EBMUD is a California wholesale and retail water utility serving approximately 1.4 million customers in Alameda and Contra Costa counties. Like Sonoma Water, it operates reservoir infrastructure, wholesale water supply contracts, and wastewater services — making it a structurally analogous California water utility with similar regulatory and operational characteristics.
- San Diego County Water Authority: San Diego County Water Authority is a wholesale water agency supplying 24 member agencies serving 3.3 million people. It operates major conveyance infrastructure (aqueducts, pipelines) similar to Sonoma Water's Russian River system and is a comparable mid-sized California wholesale water utility.
- Santa Clara Valley Water Authority (Valley Water): Valley Water is the wholesale water supplier for Santa Clara County, serving 2 million residents through 13 water retailers. Comparable to Sonoma Water in structure (wholesale water agency with groundwater banking, recycled water, and flood protection mandates), it represents a direct peer in the Bay Area/California water agency ecosystem.
- Marin Municipal Water District: Marin Municipal Water District is both a customer and a direct peer of Sonoma Water, receiving wholesale water supply and collaborating on the Atmospheric River Capture initiative. It operates its own reservoir system (Mount Tamalpais watershed) and water treatment facilities, making it a comparable Northern California water utility.
- Sacramento Regional County Sanitation District (Regional San): Regional San operates the largest wastewater treatment facility in California and provides wastewater services to 1.6 million residents. Like Sonoma Water's sanitation zones/districts, it operates regional wastewater infrastructure and is comparable in government-entity structure and regulated utility economics.
Broad incumbents
- Metropolitan Water District of Southern California: Metropolitan is the largest wholesale water supplier in the United States, delivering water to 26 member agencies serving 19 million Californians. It shares Sonoma Water's wholesale-only model and large-scale conveyance infrastructure (Colorado River Aqueduct, State Water Project) but operates at vastly greater scale and across a much larger service territory.
- California Water Service Company (Cal Water): Cal Water is an investor-owned utility serving nearly 2 million customers across California. While it differs in private vs. public ownership, it operates similar regulated water utility infrastructure (reservoirs, treatment, distribution) and provides a useful comparability point for operational scale and regulatory framework.
Regional players
- Zone 7 Water Agency: Zone 7 is a water agency serving the Livermore-Amador Valley in Alameda County, providing wholesale water, flood protection, and groundwater management. It combines water supply, flood protection, and groundwater management mandates similar to Sonoma Water's diversified portfolio, though serving a different Northern California geography.
Others
- Central Valley Flood Protection Board: While not a water supply agency, the Central Valley Flood Protection Board manages flood management infrastructure across California's Central Valley. It provides a relevant comparability reference for Sonoma Water's flood protection mandate (Warm Springs Dam, Coyote Valley Dam, Matanzas Creek Reservoir, 80+ miles of creek maintenance).
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
Sonoma Water social profiles
Digital presenceSonoma Water financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sonoma Water leadership team
Management profileNumber of profiles
Profiles1 record
Sonoma Water subsidiaries and ownership
Company hierarchySubsidiaries9 records
Sonoma Water funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sonoma Water M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sonoma Water
What does Sonoma Water do?
Sonoma Water is a wholesale water agency that captures, treats, and delivers naturally filtered Russian River water through a 79-mile aqueduct transmission system to nine municipal contractors serving over 600,000 residents in Sonoma and Marin counties. The agency also provides flood protection infrastructure (dams, reservoirs, creeks), wastewater collection and treatment services to approximately 22,000 residences and businesses, recycled water production and distribution, and groundwater management under California's Sustainable Groundwater Management Act.
Is Sonoma Water a public or private company?
Sonoma Water is a private company. It is classified as state government owned and is currently operating.
When was Sonoma Water founded?
Sonoma Water was founded in 1949. It employs 101 to 250 people.
Where is Sonoma Water based?
Sonoma Water is headquartered in Santa Rosa, United States, in the North America region.
How does Sonoma Water make money?
Two revenue lines are on record. Wholesale Water Sales are the primary driver. The others are sanitation Services.
Who are Sonoma Water's main competitors?
Direct peers on record are Contra Costa Water District, East Bay Municipal Utility District (EBMUD), San Diego County Water Authority, Santa Clara Valley Water Authority (Valley Water), Marin Municipal Water District and Sacramento Regional County Sanitation District (Regional San). Broad incumbents are Metropolitan Water District of Southern California and California Water Service Company (Cal Water). Zone 7 Water Agency is listed as a regional player. Central Valley Flood Protection Board is listed as an others.
Does Sonoma Water have an API?
No public API is recorded for Sonoma Water.
What industry is Sonoma Water in?
Sonoma Water's product category is Water Utility Services. Its primary akta.pro industry code is EUANAAAB, Raw Water Conveyance & Transmission (Aqueducts, Mains, Pumping Stations), with a secondary code of BPAIAMAE, Water Resources Administration (Watersheds, Rivers, Groundwater). Its NAICS code is 22131 and its SIC code is 4941.