Tapcensus

Water quality for ZIP code 95441

ZIP 95441 covers Geyserville in Sonoma County, California, one of 38 ZIP codes in the county. 445 active public water systems serve the county; 76 had an EPA violation in the past three years.

Most likely your provider

Gill Creek Mutual Water Company CA4900521 · Community water system · Ground water
Serves 290 people Rules violated, past 3 years 0 Distance 0.9 mi
View system details EPA facility report

Other community water systems in Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
California-American Geyserville (puc)
 1,050 0 1.5 mi
Palomino Lakes Mutual Water Co.
 300 0 4.7 mi
Rains Creek Water District
 208 0 5.7 mi
Clear Creek Water Company
 40 0 6.3 mi
South Cloverdale Water Company
 90 2 6.5 mi
Six Acres Water Company
 66 2 7.0 mi
Cloverdale, City of
Cloverdale		 8,710 1 7.6 mi
Healdsburg, City of
Healdsburg		 10,972 0 7.9 mi
Rio Lindo Adventist Academy
 178 0 8.0 mi
Alexander Valley Acres Water Company
 27 0 8.1 mi
West Water Company (puc)
 40 0 8.6 mi
Sonoma County Csa 41-Fitch Mountain
 1,115 1 8.6 mi
Russian River Mutual Water Co.
 87 0 9.2 mi
Evergreen Mobile Estates
 65 0 12.6 mi
Windsor, Town of
 25,561 0 14.5 mi
Shamrock Mobile Home Park
 188 1 15.0 mi
Armstrong Valley-Cal Water Service (puc)
 539 0 15.6 mi
Hilton Mutual Water Company
 36 1 15.9 mi
Odd Fellows Recreation Club
 557 0 16.0 mi
Loch Haven Mutual Water Company
 26 0 16.1 mi
Mobile Home Estates
 403 2 16.1 mi
Russian River County Water District
 4,150 0 16.1 mi
Colonial Park
 342 0 16.3 mi
Sweetwater Springs Cwd Guerneville
 5,156 0 16.5 mi
Noel Heights-Cal Water Service (puc)
 86 0 16.8 mi
All 129 community water systems in Sonoma County
Non-community systems in Sonoma County (316: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Zialena Winery
 30 0 0
Geyserville Newtech Academy School
 200 1 1
Macdonald Bunkhouse
 30 0 0
Seghesio Farms
 38 0 0
Pedroncelli Winery
 25 0 0
J. Rickards Winery
 38 0 0
North Coast Wine Co.
 39 1 1
Vimark Trione Winery
 25 0 0
Chateau Diana
 64 0 0
Geyserville Winery
 100 0 0
Francis Coppola Winery
 222 1 1
Zichichi Winery
 41 0 0
Cast Estate Vineyards & Cellars
 50 0 0
Timber Crest Farms
 26 0 0
Preston Winery
 55 0 0
Trentadue Winery
 70 0 0
Dutcher Crossing Winery
 40 0 0
Truett & Hurst Winery
 35 0 0
Ferrari-Carano Winery
 75 1 1
Rack & Riddle Custom Wine Services
 61 0 0
Cloverdale Campground
 100 0 0
Vinwood Cellars Production Area
 80 0 0
E String Cellars
 54 0 0
Asti Winery
 57 0 0
Bella Vineyards and Wine Caves
 45 0 0
Fritz Winery and Vineyard
 26 0 0
Vino Farms, Inc. Wasson Ranch
 35 0 0
Sbragia Winery
 68 0 0
U.s. Army Corps-Lake Sonoma Headquarters
 52 0 0
E & J Gallo Winery-Sonoma
 124 0 0
Foley Sonoma Winery
 59 0 0
Robert Young Family Limited Partner
 28 0 0
Rued Vineyards
 26 0 0
Lytton Springs Winery
 93 0 0
Mazzocco Winery
 25 0 0
Quivira Vineyards
 31 1 0
Dry Creek Store
 60 0 0
Michel-Schlumberger Fine Wine Estate
 50 0 0
Passalacqua Winery
 25 0 0
Dry Creek Vineyard
 36 0 0
Virginia Dare Winery
 51 1 1
Amista Vineyards
 51 0 0
Starlite Winery
 101 0 0
Mauritson Family Winery
 40 0 0
Saini Winery
 35 0 0
Jordan Vineyard & Winery
 50 0 0
Lake Sonoma Marina
 51 0 0
Lambert Bridge Winery
Healdsburg 		38 0 0
Wilson Winery
 30 0 0
Jimtown and Then Sum
 35 0 0
All non-community systems
About this data

Water systems are matched to Sonoma County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.

ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.