Tapcensus

Water quality in Sebastopol, California

Sebastopol 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

Belmont Terrace Mutual Water Company CA4900558 · Community water system · Ground water
Serves 287 people Rules violated, past 3 years 0 Last sanitary survey Apr 23, 2024 Distance 0.6 mi
View system details EPA facility report

Other community water systems in Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Sebastopol, City of
Sebastopol		 7,522 0 1.4 mi
Pine Hill Terrace Mobile Home Park
 27 1 1.7 mi
Graton Mutual Water System
 50 0 1.9 mi
Downtown Graton Mutual Water System
 44 0 2.0 mi
Fircrest Mutual Water Company
 126 0 2.2 mi
Willowside Mutual Water Company
 528 0 2.4 mi
Blue Spruce Mobile Home Park
 90 0 2.5 mi
Kelly Mutual Water Company
 135 1 2.8 mi
Park Royal Mutual Water Company
 75 0 3.6 mi
Athena Terrace Mutual Water Company
 47 0 4.2 mi
Lone Pine Mutual Water Company
 65 0 4.2 mi
Vinehill Vistas Mutual Water Company
 37 0 4.3 mi
Hawkins Water Co-Cal Water Service (puc)
 91 0 4.8 mi
Leisure Mobile Home Park
 410 0 5.0 mi
Sonoma County Csa 41-Freestone
 90 0 5.2 mi
Forestville Water District
 3,717 1 5.2 mi
Roseland Mobile Home Park
 130 0 5.8 mi
Occidental Community Services District
 383 0 5.8 mi
Wendell Lane Mutual Water Company
 82 0 6.2 mi
Camp Meeker Water System
 1,171 0 6.3 mi
Larkin Woods Mutual Water Company
 34 0 6.4 mi
James Court Water System
 208 1 6.4 mi
Robin Way Water System
 66 0 6.6 mi
Sunset Park Community
 157 1 6.9 mi
Western Mobile Home Park
 178 1 7.0 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
Sebastopol Charter School
 310 0 0
Horse & Plow Tasting Room
 45 0 0
Andy's Produce Market, Inc.
 71 1 1
Tlc Child & Family Services
 35 0 0
Sonoma West Holdings North Plant
 50 0 0
Molino Corner Water System
 100 0 0
Gold Ridge Pinot Dba Emeritus Vineyards
 26 0 0
Balletto Vineyards
 42 0 0
Mycopia LLC
Sebastopol 		70 0 0
Lynmar Winery
 100 0 0
Char Vale Vineyards
 25 0 0
Oak Grove School
 500 1 1
Plumfield Academy School (occidental Rd)
 30 0 0
Dutton Ranch Corporation
 75 0 0
Lieto Water System (reach Chartr School)
 30 0 0
Graton Commerce Center
 30 0 0
Furthermore Wines Water System
 27 0 0
Twin Hills School Dist-Apple Blossom Sch
 400 0 0
Santa Rosa Golf & Country Club
 250 0 0
Farmer Water System
 26 0 0
Sebastopol Vineyards
 156 0 0
Oak Grove School District Office
 36 0 0
Humane Society of Sonoma County
 27 0 0
Willowside School
 460 1 1
Summerfield Waldorf School
 301 0 0
Twin Hills School Dist-Twin Hills School
 400 0 0
Spider Web Ranch
 38 0 0
Manzana Products Company, Inc.
 175 0 0
Dutton Farmworker Housing
 38 0 0
Sonoma West Holdings Industrial Park
 25 0 0
Sequoia Water Company
 100 0 0
Twin Hills Vineyard
 50 0 0
Mom's Apple Pie
 40 0 0
Traditional Medicinals, Inc.
 120 0 0
Gray Water System
 50 0 0
Jjapt Bloomfield
 37 0 0
Azure Acres CD Recovery Center
 30 0 0
Boisset de Loach Winery
 33 0 0
Vca Forestville Animal Hospital
 26 0 0
Campobello
 45 0 0
Ektimo Vineyards
 57 0 0
Midgley's Country Flea Market
 100 0 0
Sonoma Wine Shop
 25 0 0
Sunce Winery
 26 0 0
Russian River Winery
 73 0 0
Childkind Laguna Preschool
 42 0 0
Olivet Elementary School
 400 2 2
Gravenstein School District-Hillcrest
 289 1 1
Crowell King Ridge, LLC
 76 0 0
Gravenstein Business Park
 50 0 0
All non-community systems
About this data

Water systems are matched to Sonoma County, nearest to Sebastopol 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. Retrieved from ECHO on Oct 11, 2026.