Tapcensus

Water quality for ZIP code 95436

ZIP 95436 covers Forestville, Windsor, and 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

Forestville Water District CA4910019 · Community water system · Ground water purchased
Serves 3,717 people Rules violated, past 3 years 1 Last sanitary survey Jul 18, 2024 Distance 0.8 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
Russian River County Water District
 4,150 0 1.1 mi
Hilton Mutual Water Company
 36 1 2.3 mi
Larkin Woods Mutual Water Company
 34 0 2.4 mi
Odd Fellows Recreation Club
 557 0 2.6 mi
Vinehill Vistas Mutual Water Company
 37 0 2.7 mi
Noel Heights-Cal Water Service (puc)
 86 0 2.8 mi
Athena Terrace Mutual Water Company
 47 0 3.3 mi
Blue Spruce Mobile Home Park
 90 0 3.5 mi
Downtown Graton Mutual Water System
 44 0 4.0 mi
Graton Mutual Water System
 50 0 4.2 mi
Pine Hill Terrace Mobile Home Park
 27 1 4.3 mi
Sweetwater Springs Cwd Guerneville
 5,156 0 4.7 mi
Camp Meeker Water System
 1,171 0 5.1 mi
Alliance Redwoods Conference Grounds
 46 1 5.2 mi
Armstrong Valley-Cal Water Service (puc)
 539 0 5.5 mi
Occidental Community Services District
 383 0 5.9 mi
Belmont Terrace Mutual Water Company
 287 0 6.4 mi
Sweetwater Springs Cwd Monte Rio
 3,531 0 6.4 mi
Willowside Mutual Water Company
 528 0 6.6 mi
Evergreen Mobile Estates
 65 0 6.8 mi
Stonegate Mobile Home Park
 196 0 7.1 mi
Windsor, Town of
 25,561 0 7.2 mi
Shamrock Mobile Home Park
 188 1 7.3 mi
Mobile Home Estates
 403 2 7.3 mi
Sebastopol, City of
Sebastopol		 7,522 0 7.3 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
Moshin Vineyards
 30 0 0
Gary Farrell Winery
 106 0 0
Russian River Vineyards & Restaurant
 157 0 0
Crowell King Ridge, LLC
 76 0 0
River Bend Resort
 255 0 0
Ektimo Vineyards
 57 0 0
Vca Forestville Animal Hospital
 26 0 0
Mount Gilead Bible Conference
 64 1 1
Thomas George Estates Winery
 25 0 0
Traditional Medicinals, Inc.
 120 0 0
Williams Selyem Winery
 25 0 0
Mom's Apple Pie
 40 0 0
Russian River Winery
 73 0 0
Chaos Vineyards, Llc.
 50 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Childkind Laguna Preschool
 42 0 0
Gracianna Winery
 64 0 0
Manzana Products Company, Inc.
 175 0 0
Sebastopol Vineyards
 156 0 0
Korbel Brothers Winery
 296 0 0
Rochioli Winery
 26 0 0
Copain Wine Cellars
 26 0 0
Hop Kiln Winery
 150 0 0
Furthermore Wines Water System
 27 0 0
Dutton Farmworker Housing
 38 0 0
Graton Commerce Center
 30 0 0
Saralee's Vineyard and Tasting Room
 84 0 0
Dutton Ranch Corporation
 75 0 0
Oak Grove School
 500 1 1
Bucher Water Company
 52 1 1
Mycopia LLC
Sebastopol 		70 0 0
Lynmar Winery
 100 0 0
Gold Ridge Pinot Dba Emeritus Vineyards
 26 0 0
Plumfield Academy School (occidental Rd)
 30 0 0
Char Vale Vineyards
 25 0 0
Boisset de Loach Winery
 33 0 0
Bricoleur Vineyards
 57 0 0
Macrostie Winery and Vineyard
 150 0 0
Sunce Winery
 26 0 0
Johnson's Beach Resort
 200 0 0
Azure Acres CD Recovery Center
 30 0 0
Spider Web Ranch
 38 0 0
Hook & Ladder Vineyards and Winery
 35 0 0
LA Crema Winery
 75 0 0
Molino Corner Water System
 100 0 0
Martinelli Ranch
 52 0 0
Westminster Woods Camp
 18 1 1
Sonoma West Holdings North Plant
 50 0 0
Olivet Elementary School
 400 2 2
Tlc Child & Family Services
 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.