Tapcensus

Water quality in Guerneville, California

Guerneville is in Sonoma County. 445 active public water systems serve the county; 76 had an EPA violation in the past three years.

Most likely your provider

Armstrong Valley-Cal Water Service (puc) CA4910018 · Community water system · Ground water
Serves 539 people Rules violated, past 3 years 0 Last sanitary survey Mar 10, 2022 Distance 0.5 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
Sweetwater Springs Cwd Guerneville
 5,156 0 1.1 mi
Odd Fellows Recreation Club
 557 0 2.4 mi
Noel Heights-Cal Water Service (puc)
 86 0 2.5 mi
Hilton Mutual Water Company
 36 1 2.8 mi
Russian River County Water District
 4,150 0 4.0 mi
Austin Creek Mutual (springhill)
 150 0 4.1 mi
Sweetwater Springs Cwd Monte Rio
 3,531 0 4.1 mi
Austin Acres Mutual Water Company
 82 0 4.2 mi
Redwood Heights Mutual Water Company
 30 1 4.3 mi
Larkin Woods Mutual Water Company
 34 0 4.4 mi
Huckleberry Mutual Water Company
 45 1 4.5 mi
Magic Mountain Mutual Water Company
 171 0 4.5 mi
Sonoma County Mutual Water Company
 40 0 4.5 mi
Sunrise Mountain Mutual Water Company
 100 0 4.6 mi
Cazadero Water Company, Inc. (puc)
 525 3 5.5 mi
Forestville Water District
 3,717 1 5.8 mi
Alliance Redwoods Conference Grounds
 46 1 5.8 mi
Rancho del Paradiso-Cal Water Svc (puc)
 110 0 6.4 mi
Camp Meeker Water System
 1,171 0 6.6 mi
Vinehill Vistas Mutual Water Company
 37 0 7.7 mi
Occidental Community Services District
 383 0 7.8 mi
Sonoma County Csa 41-Jenner
 406 0 8.2 mi
Athena Terrace Mutual Water Company
 47 0 8.3 mi
Blue Spruce Mobile Home Park
 90 0 8.3 mi
Bridgehaven Park
 30 2 8.4 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
Gurdjieff Foundation
 40 0 0
Johnson's Beach Resort
 200 0 0
Korbel Brothers Winery
 296 0 0
Csp-Armstrong Redwoods State Reserve
 611 0 0
River Bend Resort
 255 0 0
East Austin Creek Mutual Water Company
 32 0 0
Camp Royaneh
 70 0 0
Mount Gilead Bible Conference
 64 1 1
Casini Ranch Campground
 442 0 0
Gary Farrell Winery
 106 0 0
Moshin Vineyards
 30 0 0
Cazadero Performing Arts Camp
 301 0 0
Westminster Woods Camp
 18 1 1
Blue Heron Restaurant
 50 1 1
Duncans Mills Trading Company
 45 0 0
Duncans Mills Camping Club
 127 0 0
Thomas George Estates Winery
 25 0 0
Bucher Water Company
 52 1 1
Williams Selyem Winery
 25 0 0
Chaos Vineyards, Llc.
 50 0 0
Hop Kiln Winery
 150 0 0
Gracianna Winery
 64 0 0
Russian River Vineyards & Restaurant
 157 0 0
Rochioli Winery
 26 0 0
Macrostie Winery and Vineyard
 150 0 0
Matrix Winery
 30 0 0
Bacigalupi Vineyards
 49 0 0
Crowell King Ridge, LLC
 76 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Flowers Winery
 60 0 0
West Side Union School District
 175 0 0
Ektimo Vineyards
 57 0 0
Occidental Arts & Ecology Center
 51 2 1
Vca Forestville Animal Hospital
 26 0 0
Copain Wine Cellars
 26 0 0
Overshine Wine Company
 40 0 0
Traditional Medicinals, Inc.
 120 0 0
Union Hotel
 350 0 0
Mom's Apple Pie
 40 0 0
Mill Creek Vineyards
 25 0 0
Manzana Products Company, Inc.
 175 0 0
Russian River Winery
 73 0 0
Madrona Manor
 34 2 0
Dutton Farmworker Housing
 38 0 0
Baca Tasting Room
Healdsburg 		53 0 0
Childkind Laguna Preschool
 42 0 0
Vino Farms, Inc. Preston Ranch
 72 0 0
Sebastopol Vineyards
 156 0 0
Bacchus Landing Cellars
Healdsburg 		250 0 0
Orsi Family Vineyards
 26 0 0
All non-community systems
About this data

Water systems are matched to Sonoma County, nearest to Guerneville 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.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.