Tapcensus

Water quality for ZIP code 95446

ZIP 95446 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 1.7 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 0.6 mi
Austin Creek Mutual (springhill)
 150 0 3.2 mi
Redwood Heights Mutual Water Company
 30 1 3.3 mi
Noel Heights-Cal Water Service (puc)
 86 0 3.5 mi
Austin Acres Mutual Water Company
 82 0 3.5 mi
Odd Fellows Recreation Club
 557 0 3.6 mi
Sunrise Mountain Mutual Water Company
 100 0 3.6 mi
Sonoma County Mutual Water Company
 40 0 3.6 mi
Huckleberry Mutual Water Company
 45 1 3.6 mi
Magic Mountain Mutual Water Company
 171 0 3.8 mi
Hilton Mutual Water Company
 36 1 3.9 mi
Sweetwater Springs Cwd Monte Rio
 3,531 0 4.0 mi
Cazadero Water Company, Inc. (puc)
 525 3 4.3 mi
Russian River County Water District
 4,150 0 5.1 mi
Larkin Woods Mutual Water Company
 34 0 5.3 mi
Rancho del Paradiso-Cal Water Svc (puc)
 110 0 5.9 mi
Alliance Redwoods Conference Grounds
 46 1 6.2 mi
Forestville Water District
 3,717 1 6.8 mi
Camp Meeker Water System
 1,171 0 7.1 mi
Sonoma County Csa 41-Jenner
 406 0 7.4 mi
Bridgehaven Park
 30 2 7.7 mi
Occidental Community Services District
 383 0 8.4 mi
Vinehill Vistas Mutual Water Company
 37 0 8.8 mi
Blue Spruce Mobile Home Park
 90 0 9.3 mi
Athena Terrace Mutual Water Company
 47 0 9.4 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
Csp-Armstrong Redwoods State Reserve
 611 0 0
Johnson's Beach Resort
 200 0 0
Korbel Brothers Winery
 296 0 0
East Austin Creek Mutual Water Company
 32 0 0
Camp Royaneh
 70 0 0
River Bend Resort
 255 0 0
Cazadero Performing Arts Camp
 301 0 0
Casini Ranch Campground
 442 0 0
Blue Heron Restaurant
 50 1 1
Duncans Mills Trading Company
 45 0 0
Duncans Mills Camping Club
 127 0 0
Mount Gilead Bible Conference
 64 1 1
Westminster Woods Camp
 18 1 1
Gary Farrell Winery
 106 0 0
Moshin Vineyards
 30 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
Padmasambhava Peace Institute
 28 0 0
Matrix Winery
 30 0 0
Russian River Vineyards & Restaurant
 157 0 0
Occidental Arts & Ecology Center
 51 2 1
Gracianna Winery
 64 0 0
Macrostie Winery and Vineyard
 150 0 0
Bacigalupi Vineyards
 49 0 0
Rochioli Winery
 26 0 0
Crowell King Ridge, LLC
 76 0 0
Csp-Goat Rock State Beach
 402 0 0
Flowers Winery
 60 0 0
West Side Union School District
 175 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Ektimo Vineyards
 57 0 0
Union Hotel
 350 0 0
Overshine Wine Company
 40 0 0
Vca Forestville Animal Hospital
 26 0 0
Mill Creek Vineyards
 25 0 0
Traditional Medicinals, Inc.
 120 0 0
Copain Wine Cellars
 26 0 0
Madrona Manor
 34 2 0
Mom's Apple Pie
 40 0 0
Baca Tasting Room
Healdsburg 		53 0 0
Manzana Products Company, Inc.
 175 0 0
Dutton Farmworker Housing
 38 0 0
Bacchus Landing Cellars
Healdsburg 		250 0 0
Catholic Charities Cyo Camp
 250 0 0
Russian River Winery
 73 0 0
Orsi Family Vineyards
 26 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.