Tap Truth EPA drinking water records, in plain English

County drinking water records

Sonoma County, CA drinking water systems

127 community water systems serve Sonoma County, CA, reporting 441,259 people served in all. A system that also serves other counties counts all of its customers here.

33 of them (26%) had at least one health-based violation in the last 10 years. 22 systems still have one unresolved.

107 rely mainly on groundwater and 20 on surface water, counting water bought from other systems.

119 systems filed a lead service line inventory listing 3 lead lines, 652 galvanized lines that must be replaced and 9,962 lines of unknown material.

6 more systems are placed in Sonoma County, CA by the county their records name because they have no service area map that lines up with their own records, so they are listed apart and not counted here.

Community water systems
127
People served, sum of each system's own figure
441,259
Systems with a health-based violation, last 10 years
33
Systems with one unresolved
22
Lead service lines in inventories
3

Water systems serving Sonoma County

127 systems

People served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
City of Santa Rosa Santa Rosa 175,396 Groundwater 0 0 0
City of Petaluma Petaluma 60,781 Groundwater 0 0 0
City of Rohnert Park Rohnert Park 43,821 Groundwater 0 0 0
Town of Windsor Windsor and Larkfield-Wikiup 25,561 Groundwater 0 0 0
Valley of the Moon Water District Fetters Hot Springs-Agua Caliente, El Verano and 2 more and land outside them 23,107 Groundwater 0 0 0
City of Sonoma Sonoma 11,725 Groundwater 0 1 0
Sonoma State University Sonoma State University 10,986 Groundwater 1 0 0
City of Healdsburg Healdsburg 10,985 Groundwater under direct influence 0 0 0
City of Cloverdale Cloverdale 10,398 Groundwater under direct influence 0 1 0
California-American Larkfield (Puc) Larkfield-Wikiup and Fulton 7,913 Groundwater 0 0 0
City of Sebastopol Sebastopol 7,522 Groundwater 0 0 0
City of Cotati Cotati and land outside it 7,303 Groundwater 0 0 0
Sweetwater Springs CWD - Guerneville Guerneville 6,000 Groundwater 0 0 0
Russian River County Water District Forestville and land outside it 4,150 Groundwater 0 0 0
Forestville Water District Forestville 3,788 Purchased groundwater 0 0 0
Sweetwater Springs CWD - Monte Rio Monte Rio and land outside it 3,000 Groundwater 0 0 0
Penngrove Water Company (Puc) Penngrove and Rohnert Park and land outside them 1,742 Purchased groundwater 0 0 0
Sonoma County CSA 41-Fitch Mountain Outside cities and towns 1,265 Purchased surface water 0 0 0
Camp Meeker Water System Occidental 1,171 Groundwater 0 0 0
Sea Ranch Water Company,The (Puc) Sea Ranch 1,160 Surface water 1 3 No inventory
Bodega Bay Public Utility District Bodega Bay and Salmon Creek 1,069 Groundwater 0 0 0
California-American Geyserville (Puc) Geyserville 1,046 Groundwater 0 0 0
Kenwood Village Water Company (Puc) Kenwood 1,029 Groundwater 0 0 0
Canon Manor Water System Outside cities and towns 805 Groundwater 0 0 0
Odd Fellows Recreation Club Outside cities and towns 757 Groundwater 0 0 0
Moon Valley Water System Sonoma 691 Groundwater 0 0 0
Diamond A Mutual Water Company Outside cities and towns 640 Groundwater 1 2 0
Occidental Community Services District Occidental 533 Groundwater 0 0 0
Cazadero Water Company, Inc. (Puc) Cazadero 525 Groundwater under direct influence 8 1 0
Armstrong Valley-Cal Water Service (Puc) Guerneville 473 Groundwater 0 0 0
U.S. Coast Guard Training Center Petaluma Center 469 Purchased groundwater 1 2 0
Rincon Valley Mobile Estates Santa Rosa 460 Groundwater 1 2 0
Willowside Mutual Water Company Outside cities and towns 448 Groundwater 0 0 0
Bennett Ridge Mutual Water Company Outside cities and towns 439 Groundwater 0 0 0
Sereno Del Mar Water Company (Puc) Sereno del Mar and land outside it 435 Surface water 0 0 0
Sonoma County CSA 41-Salmon Creek Salmon Creek 427 Surface water 0 0 0
Santa Rosa Mobile Estates Outside cities and towns 420 Groundwater 0 0 0
Alliance Redwoods Conference Grounds Outside cities and towns 418 Groundwater under direct influence 0 0 0
Leisure Mobile Home Park Santa Rosa 410 Groundwater 0 0 0
Sonoma County CSA 41-Jenner Jenner 406 Surface water 11 0 0
Heights Mutual Water Company Outside cities and towns 363 Groundwater 0 0 0
Colonial Park Larkfield-Wikiup 342 Groundwater 0 0 0
Branger Mutual Water Company, Inc. Outside cities and towns 300 Groundwater 2 2 No inventory
Holland Heights Mutual Water Company Outside cities and towns 300 Groundwater 0 0 0
Palomino Lakes Mutual Water Co. Outside cities and towns 300 Groundwater 0 0 0
Gill Creek Mutual Water Company Outside cities and towns 290 Groundwater 0 0 0
Sonoma County CSA 41-Freestone Outside cities and towns 290 Surface water 0 0 0
Carmet By the Sea Water Company Carmet 288 Groundwater under direct influence 0 0 0
Belmont Terrace Mutual Water Company Outside cities and towns 287 Groundwater 0 0 0
Timber Cove County Water District Timber Cove 271 Surface water 1 0 0
Happy Acres Mutual Benefit Water System Outside cities and towns 260 Groundwater 0 0 0
Shanel Tribal Utility District Outside cities and towns 250 Purchased groundwater 0 0 3
Mountain View Mobile Estates, LLC Outside cities and towns 250 Groundwater 0 0 0
College Park Mutual Water Company Outside cities and towns 244 Groundwater 0 0 0
Magic Mountain Mutual Water Company Outside cities and towns 221 Groundwater 2 0 0
North Star Mobile Home Park Outside cities and towns 221 Groundwater 0 0 0
Lawndale Mutual Water Company Outside cities and towns 218 Purchased groundwater 0 1 0
Mobile Home Estates Larkfield-Wikiup 210 Groundwater 1 2 No inventory
Rains Creek Water District Outside cities and towns 208 Groundwater 0 0 0
James Court Water System Santa Rosa 208 Groundwater 1 0 0
Randal's Ranchette Mutual Water Company Santa Rosa 200 Groundwater 1 3 No inventory
Yulupa Mutual Water Company Outside cities and towns 200 Groundwater 0 0 0
El Portal Mobile Estates Outside cities and towns 200 Groundwater 2 2 0
Stonegate Mobile Home Park Outside cities and towns 196 Groundwater 0 0 0
Shamrock Mobile Home Park Windsor 188 Groundwater 0 0 0
Sonoma Mountain County Water District Outside cities and towns 181 Groundwater 0 0 0
Rio Lindo Adventist Academy Outside cities and towns 178 Groundwater under direct influence 0 0 0
Western Mobile Home Park Outside cities and towns 178 Groundwater 1 2 0
Plaza Mobile Home Park Outside cities and towns 169 Groundwater 1 2 0
Kashia Timber Cove 153 Surface water 5 0 0
Sonoma Ranch Mutual Water Company Outside cities and towns 151 Groundwater 1 2 0
Mission Highlands Mutual Water Co. Outside cities and towns 150 Groundwater 0 0 0
Riebli Mutual Water Company Outside cities and towns 150 Groundwater 0 0 0
Austin Creek Mutual (Springhill) Outside cities and towns 150 Groundwater 0 0 0
George Ranch Mutual Water Company Outside cities and towns 148 Groundwater 1 2 0
Sunset Park Community Santa Rosa 141 Groundwater 1 2 No inventory
Kelly Mutual Water Company Outside cities and towns 135 Groundwater 1 2 No inventory
Roseland Mobile Home Park Santa Rosa 130 Groundwater 0 0 0
End-O-Valley Mutual Water Company Outside cities and towns 129 Groundwater 0 0 0
Fircrest Mutual Water Company Outside cities and towns 126 Groundwater 0 0 0
Downtown Graton Mutual Water System Graton 115 Groundwater 0 0 0
Brand Water Company Santa Rosa 112 Groundwater 0 0 0
Sunrise Mountain Mutual Water Company Outside cities and towns 100 Groundwater 0 0 0
Hilton Mutual Water Company Outside cities and towns 100 Groundwater 0 0 0
Rancho Del Paradiso-Cal Water SVC (Puc) Outside cities and towns 94 Purchased groundwater 0 0 0
Michele Mutual Water Company Larkfield-Wikiup 93 Groundwater 0 0 0
South Cloverdale Water Company Cloverdale 90 Groundwater 1 2 0
Blue Spruce Mobile Home Park Graton 90 Groundwater 0 0 0
Valley Ford Water Association Valley Ford 88 Groundwater 49 2 No inventory
Russian River Mutual Water Co. Outside cities and towns 87 Groundwater 0 0 0
Austin Acres Mutual Water Company Outside cities and towns 82 Groundwater 0 0 0
Wendell Lane Mutual Water Company Outside cities and towns 82 Groundwater 0 0 0
Hawkins Water Co-Cal Water Service (Puc) Outside cities and towns 81 Groundwater 0 0 0
Sobre Vista Water Company Outside cities and towns 80 Groundwater 0 0 0
Noel Heights-Cal Water Service (Puc) Outside cities and towns 79 Groundwater under direct influence 0 0 0
Bodega Water Company Bodega 77 Groundwater under direct influence 1 0 0
Madrone Mutual Water Company Outside cities and towns 76 Groundwater 0 0 0
Park Royal Mutual Water Company Outside cities and towns 75 Groundwater 2 0 0
Wilshire Heights Mutual Water Company Outside cities and towns 70 Groundwater 0 0 0
Bridgehaven Park Outside cities and towns 70 Surface water 5 0 0
Six Acres Water Company Outside cities and towns 66 Groundwater under direct influence 7 0 0
Robin Way Water System Outside cities and towns 66 Groundwater 5 0 0
Lone Pine Mutual Water Company Outside cities and towns 65 Groundwater 0 0 0
Evergreen Mobile Estates Windsor 65 Groundwater 0 0 0
Melita Heights Mutual Water Company Santa Rosa 64 Groundwater 0 1 0
Mark West Acres MWC Outside cities and towns 61 Groundwater 0 0 0
Boulevard Heights Mutual Water Outside cities and towns 60 Groundwater 0 0 0
Terrace View Water System Outside cities and towns 60 Groundwater 0 0 0
Morton's Warm Springs / Sonoma Springs Outside cities and towns 59 Groundwater 0 0 0
Delores Lane Water System Outside cities and towns 59 Groundwater 1 0 0
Lichau Hylands Mutual Water Company Outside cities and towns 56 Groundwater 0 0 0
Athena Terrace Mutual Water Company Outside cities and towns 50 Groundwater 0 0 0
Graton Mutual Water System Graton 50 Groundwater 0 0 0
Kinnybrook Mutual Water Company Kenwood 48 Groundwater 0 0 0
Huckleberry Mutual Water Company Outside cities and towns 45 Groundwater 0 0 0
Summit View Ranch Mutual Water Co. Outside cities and towns 45 Groundwater 0 0 0
Vinehill Vistas Mutual Water Company Outside cities and towns 42 Groundwater 0 0 0
Sonoma County Mutual Water Company Outside cities and towns 40 Groundwater under direct influence 82 0 0
Clear Creek Water Company Outside cities and towns 40 Groundwater 0 0 0
West Water Company (Puc) Outside cities and towns 40 Groundwater 0 0 0
Larkin Woods Mutual Water Company Outside cities and towns 34 Groundwater under direct influence 0 0 0
Redwood Heights Mutual Water Company Outside cities and towns 30 Groundwater 1 0 0
Alexander Valley Acres Water Company Outside cities and towns 27 Groundwater 0 0 0
Pine Hill Terrace Mobile Home Park Outside cities and towns 27 Groundwater 0 0 0
Loch Haven Mutual Water Company Outside cities and towns 26 Groundwater 6 0 0
Rolling Oaks Road Association Outside cities and towns 25 Groundwater 0 0 0
Mark West Meadows Mutual Water Outside cities and towns 20 Groundwater 1 2 No inventory

Systems placed by county record in Sonoma County

6 systems

EPA has no service area map for these systems. They are placed by the county their records name (the counties EPA lists them serving, or the county coded in their IDs where EPA lists none), and without a map they are not counted in the figures above.

System Serves People served Main source Health-based violations, 10 years Unresolved Lead lines
Lytton Rancheria Water System County on record 600 Groundwater 0 0 0
Eddy Drive County on record 48 Groundwater 0 0 No inventory
Crystals County on record 40 Groundwater 0 0 No inventory
Corby Avenue Apartments County on record 38 Groundwater 0 0 No inventory
Odiyan Buddhist Retreat Center County on record 35 Groundwater 0 0 0
Sonoma County Water Agency County on record Not reported Groundwater 0 0 0

Cities and towns in Sonoma County

35 places

Back to California

Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations