Tapcensus

Water quality in Sonoma, California

Sonoma 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

Sonoma, City of CA4910012 · Community water system · Ground water · Sonoma
Serves 10,619 people Rules violated, past 3 years 1 Unresolved 1 Last sanitary survey Jul 23, 2024 Distance 0.7 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
Eddy Drive
Sonoma		 48 0 0.7 mi
Moon Valley Water System
 691 0 0.7 mi
Sonoma Ranch Mutual Water Company
 151 1 2.8 mi
Mission Highlands Mutual Water Co.
 150 0 2.8 mi
Valley of the Moon Water District
 23,140 0 3.3 mi
George Ranch Mutual Water Company
 148 1 4.2 mi
Sobre Vista Water Company
 80 1 4.6 mi
Diamond a Mutual Water Company
 640 1 5.0 mi
Terrace View Water System
 60 0 8.6 mi
Lichau Hylands Mutual Water Company
 56 0 9.3 mi
Sonoma Springs
 37 0 9.3 mi
Petaluma, City of
Petaluma		 61,427 0 9.6 mi
College Park Mutual Water Company
 244 1 9.6 mi
Kenwood Village Water Company (puc)
 1,029 0 10.4 mi
Summit View Ranch Mutual Water Co.
 45 0 10.6 mi
Lawndale Mutual Water Company
 208 1 10.7 mi
Kinnybrook Mutual Water Company
 48 0 10.7 mi
Bennett Ridge Mutual Water Company
 439 0 10.9 mi
Penngrove Water Company (puc)
 1,742 0 11.3 mi
Boulevard Heights Mutual Water
 60 0 11.6 mi
Canon Manor Water System
 828 0 11.9 mi
Yulupa Mutual Water Company
 200 0 12.0 mi
Sonoma Mountain County Water District
 185 0 12.0 mi
Sonoma State University
 1,500 0 12.3 mi
Rohnert Park, City of
Rohnert Park		 43,821 0 13.7 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
The Lodge at Sonoma
 300 1 0
Broadway Market
 100 0 0
Sonoma Valley Moose Lodge #2048
 80 0 0
Sonoma Seventh Day Adventist Church
 70 0 0
Fat Pilgrim General Store
Sonoma 		30 0 0
Casia Inn
Sonoma 		25 0 0
Presentation School
 200 1 1
Sebastiani Vineyards
 65 0 0
Vineburg Deli & Grocery
 104 0 0
Groskopf Warehouse & Logistics
 60 2 2
Carneros Warehousing
 50 0 0
Sangiacomo Winery
Sonoma 		62 0 0
Eighth Street East Partners
 35 0 0
The Rental Place
 30 0 0
Sonoma Warehousing
 200 0 0
Wine Country Ind Park-Bldgs A&b
 30 0 0
Wine Country Ind Park Bldg C
 70 0 0
Mayacamas Warehouse, LLC
 40 1 1
Buckley Family Partnership
 30 1 1
Gundlach Bundschu Winery
 51 0 0
Laura Chenel's Chevre Inc.
 50 1 1
Boisset Buena Vista Winery
 122 0 0
S & W Warehousing, LLC
 50 1 1
Curotto Enterprises 2 LLC
 28 0 0
Bartholomew Foundation
 50 0 0
Schellville Grill
 50 0 0
Scribe Winery
 62 0 0
Roche Family Winery
 45 0 0
Anaba Winery
 105 0 0
Carneros Deli
 29 0 0
Fremont Diner
 50 1 0
Heirs of MY Dream Winery, Inc.
 60 1 1
Westerbeke Ranch
 25 0 0
Schug Cellars
 30 0 0
Cornerstone Sonoma
 175 0 0
Gloria Ferrer Caves
 70 0 0
Nicholson Ranch Winery
 150 0 0
Jacuzzi Winery
 108 0 0
Cline Cellars
 500 0 0
Adair Viansa, LLC
 200 0 0
Donum Estate Water System
 55 0 0
Hamel Family Wines
 59 0 0
Adair B.r. Cohn, LLC
 155 0 0
KJ Carneros Hills Winery
 65 0 0
Arrowood Vineyards & Winery
 44 0 0
Imagery Estate Winery
 135 0 0
Tpwc Dba Quarry Lake Winery
 25 0 0
Keller Estate Winery
 50 0 0
Csp-Petaluma Adobe State Historic Park
 134 0 0
Sonoma Botanical Garden
 35 0 0
All non-community systems
About this data

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