Tapcensus

Water quality for ZIP code 95471

ZIP 95471 covers Guerneville 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

Sweetwater Springs Cwd Guerneville CA4910004 · Community water system · Ground water
Serves 5,156 people Rules violated, past 3 years 0 Last sanitary survey Jun 21, 2022 Distance 1.9 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Armstrong Valley-Cal Water Service (puc)
 539 0 1.7 mi
Odd Fellows Recreation Club
 557 0 1.8 mi
Hilton Mutual Water Company
 36 1 2.1 mi
Noel Heights-Cal Water Service (puc)
 86 0 2.3 mi
Russian River County Water District
 4,150 0 3.2 mi
Larkin Woods Mutual Water Company
 34 0 4.3 mi
Forestville Water District
 3,717 1 5.1 mi
Sweetwater Springs Cwd Monte Rio
 3,531 0 5.1 mi
Austin Creek Mutual (springhill)
 150 0 5.3 mi
Austin Acres Mutual Water Company
 82 0 5.4 mi
Redwood Heights Mutual Water Company
 30 1 5.5 mi
Magic Mountain Mutual Water Company
 171 0 5.7 mi
Huckleberry Mutual Water Company
 45 1 5.7 mi
Sonoma County Mutual Water Company
 40 0 5.8 mi
Sunrise Mountain Mutual Water Company
 100 0 5.8 mi
Alliance Redwoods Conference Grounds
 46 1 6.2 mi
Cazadero Water Company, Inc. (puc)
 525 3 6.5 mi
Vinehill Vistas Mutual Water Company
 37 0 6.9 mi
Camp Meeker Water System
 1,171 0 6.9 mi
Athena Terrace Mutual Water Company
 47 0 7.4 mi
Rancho del Paradiso-Cal Water Svc (puc)
 110 0 7.5 mi
Blue Spruce Mobile Home Park
 90 0 7.7 mi
Occidental Community Services District
 383 0 8.1 mi
Downtown Graton Mutual Water System
 44 0 8.1 mi
Evergreen Mobile Estates
 65 0 8.2 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
Korbel Brothers Winery
 296 0 0
Gurdjieff Foundation
 40 0 0
River Bend Resort
 255 0 0
Csp-Armstrong Redwoods State Reserve
 611 0 0
Johnson's Beach Resort
 200 0 0
Gary Farrell Winery
 106 0 0
Moshin Vineyards
 30 0 0
Thomas George Estates Winery
 25 0 0
Mount Gilead Bible Conference
 64 1 1
East Austin Creek Mutual Water Company
 32 0 0
Bucher Water Company
 52 1 1
Williams Selyem Winery
 25 0 0
Chaos Vineyards, Llc.
 50 0 0
Camp Royaneh
 70 0 0
Hop Kiln Winery
 150 0 0
Gracianna Winery
 64 0 0
Macrostie Winery and Vineyard
 150 0 0
Rochioli Winery
 26 0 0
Bacigalupi Vineyards
 49 0 0
Matrix Winery
 30 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Flowers Winery
 60 0 0
West Side Union School District
 175 0 0
Westminster Woods Camp
 18 1 1
Russian River Vineyards & Restaurant
 157 0 0
Casini Ranch Campground
 442 0 0
Crowell King Ridge, LLC
 76 0 0
Cazadero Performing Arts Camp
 301 0 0
Overshine Wine Company
 40 0 0
Copain Wine Cellars
 26 0 0
Blue Heron Restaurant
 50 1 1
Ektimo Vineyards
 57 0 0
Duncans Mills Trading Company
 45 0 0
Mill Creek Vineyards
 25 0 0
Duncans Mills Camping Club
 127 0 0
Vca Forestville Animal Hospital
 26 0 0
Madrona Manor
 34 2 0
Vino Farms, Inc. Preston Ranch
 72 0 0
Traditional Medicinals, Inc.
 120 0 0
Baca Tasting Room
Healdsburg 		53 0 0
Bacchus Landing Cellars
Healdsburg 		250 0 0
Mom's Apple Pie
 40 0 0
Orsi Family Vineyards
 26 0 0
Russian River Winery
 73 0 0
Rodney Strong Vineyards
 150 0 0
Childkind Laguna Preschool
 42 0 0
Aperture Cellars
 33 0 0
Manzana Products Company, Inc.
 175 0 0
Occidental Arts & Ecology Center
 51 2 1
Bricoleur Vineyards
 57 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.