Tapcensus

Water quality for ZIP code 94954

ZIP 94954 covers Petaluma and Penngrove 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

George Ranch Mutual Water Company CA4900973 · Community water system · Ground water
Serves 148 people Rules violated, past 3 years 1 Unresolved 1 Distance 3.9 mi
View system details EPA facility report

Other community water systems in Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Petaluma, City of
Petaluma		 61,427 0 4.0 mi
Diamond a Mutual Water Company
 640 1 4.8 mi
Moon Valley Water System
 691 0 5.8 mi
Terrace View Water System
 60 0 6.4 mi
Boulevard Heights Mutual Water
 60 0 6.5 mi
Valley of the Moon Water District
 23,140 0 6.5 mi
Eddy Drive
Sonoma		 48 0 6.5 mi
Sonoma, City of
Sonoma		 10,619 1 6.7 mi
Sobre Vista Water Company
 80 1 6.7 mi
College Park Mutual Water Company
 244 1 7.3 mi
Penngrove Water Company (puc)
 1,742 0 7.8 mi
Lichau Hylands Mutual Water Company
 56 0 7.9 mi
Mission Highlands Mutual Water Co.
 150 0 8.0 mi
Sonoma Ranch Mutual Water Company
 151 1 8.8 mi
Canon Manor Water System
 828 0 9.0 mi
Summit View Ranch Mutual Water Co.
 45 0 9.4 mi
Sonoma State University
 1,500 0 9.6 mi
Sonoma Mountain County Water District
 185 0 10.6 mi
Happy Acres Mutual Benefit Water System
 260 0 10.6 mi
Cotati, City of
Cotati		 7,290 0 10.7 mi
Rohnert Park, City of
Rohnert Park		 43,821 0 10.9 mi
Sonoma Springs
 37 0 11.0 mi
Bennett Ridge Mutual Water Company
 439 0 11.3 mi
Madrone Mutual Water Company
 76 0 11.5 mi
Yulupa Mutual Water Company
 200 0 11.9 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
Csp-Petaluma Adobe State Historic Park
 134 0 0
Keller Estate Winery
 50 0 0
Adobe Christian Church
 50 0 0
Roche Family Winery
 45 0 0
Schug Cellars
 30 0 0
Westerbeke Ranch
 25 0 0
Gloria Ferrer Caves
 70 0 0
Anaba Winery
 105 0 0
Carneros Deli
 29 0 0
Cline Cellars
 500 0 0
Cornerstone Sonoma
 175 0 0
Sangiacomo Winery
Sonoma 		62 0 0
Sonoma County Parks-Putnam Park
 52 0 0
Petaluma Livestock Auction Yard
 100 0 0
Presentation School
 200 1 1
Fat Pilgrim General Store
Sonoma 		30 0 0
Sonoma Seventh Day Adventist Church
 70 0 0
Jan Klebe
 101 0 0
Lombardi's Deli & Bbq
 300 0 0
Schellville Grill
 50 0 0
Westside Storage Water System
 77 0 0
Broadway Market
 100 0 0
The Lodge at Sonoma
 300 1 0
Sonoma Valley Moose Lodge #2048
 80 0 0
Willowbrook Ale House
 50 0 0
Jacuzzi Winery
 108 0 0
Adair Viansa, LLC
 200 0 0
Cinnabar Elementary School
 228 0 0
Curotto Enterprises 2 LLC
 28 0 0
S & W Warehousing, LLC
 50 1 1
Casia Inn
Sonoma 		25 0 0
Carneros Warehousing
 50 0 0
Mayacamas Warehouse, LLC
 40 1 1
The Rental Place
 30 0 0
Buckley Family Partnership
 30 1 1
Wine Country Ind Park-Bldgs A&b
 30 0 0
Laura Chenel's Chevre Inc.
 50 1 1
Wine Country Ind Park Bldg C
 70 0 0
Sonoma Warehousing
 200 0 0
Eighth Street East Partners
 35 0 0
Vineburg Deli & Grocery
 104 0 0
Groskopf Warehouse & Logistics
 60 2 2
KOA Petaluma
 713 0 0
Tpwc Dba Quarry Lake Winery
 25 0 0
Rams Gate Winery
 135 0 0
Sebastiani Vineyards
 65 0 0
Heirs of MY Dream Winery, Inc.
 60 1 1
Speedway Sonoma LLC
 33 0 0
Fremont Diner
 50 1 0
Csp-Jack London State Historic Park
 130 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.