Tapcensus

Water quality for ZIP code 94951

ZIP 94951 covers 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

Penngrove Water Company (puc) CA4910003 · Community water system · Ground water purchased
Serves 1,742 people Rules violated, past 3 years 0 Last sanitary survey May 19, 2023 Distance 1.2 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
College Park Mutual Water Company
 244 1 1.1 mi
Canon Manor Water System
 828 0 1.4 mi
Terrace View Water System
 60 0 1.9 mi
Sonoma State University
 1,500 0 2.0 mi
Lichau Hylands Mutual Water Company
 56 0 2.4 mi
Summit View Ranch Mutual Water Co.
 45 0 2.9 mi
Rohnert Park, City of
Rohnert Park		 43,821 0 3.3 mi
Sonoma Mountain County Water District
 185 0 3.4 mi
Cotati, City of
Cotati		 7,290 0 4.0 mi
Boulevard Heights Mutual Water
 60 0 4.3 mi
Madrone Mutual Water Company
 76 0 4.6 mi
Happy Acres Mutual Benefit Water System
 260 0 4.9 mi
Petaluma, City of
Petaluma		 61,427 0 5.4 mi
Diamond a Mutual Water Company
 640 1 5.5 mi
Yulupa Mutual Water Company
 200 0 5.7 mi
Bennett Ridge Mutual Water Company
 439 0 5.8 mi
Santa Rosa Mobile Estates
 420 0 6.0 mi
Delores Lane Water System
 54 0 6.1 mi
Plaza Mobile Home Park
 169 1 6.3 mi
George Ranch Mutual Water Company
 148 1 6.3 mi
Western Mobile Home Park
 178 1 6.4 mi
North Star Mobile Home Park
 221 0 6.4 mi
EL Portal Mobile Estates
 344 1 6.7 mi
Robin Way Water System
 66 0 6.8 mi
Wendell Lane Mutual Water Company
 82 0 6.9 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
Karah Estate Winery
 27 1 1
Sonoma State U.-Fairfield Osborn Pres
 151 0 0
KOA Petaluma
 713 0 0
Petaluma Livestock Auction Yard
 100 0 0
Willowbrook Ale House
 50 0 0
Westside Storage Water System
 77 0 0
Lombardi's Deli & Bbq
 300 0 0
Liberty School
 225 0 0
Jan Klebe
 101 0 0
Cinnabar Elementary School
 228 0 0
Adobe Christian Church
 50 0 0
Sonoma Mountain Zen Center
 33 0 0
Stripe N Seal
 26 0 0
Washoe House
 75 0 0
Csp-Jack London State Historic Park
 130 0 0
7180 Hwy 116 LLC
 57 1 0
Jehovah's Witnesses Hall
 650 0 0
Friedman Brothers Hardware
 95 0 0
Csp-Petaluma Adobe State Historic Park
 134 0 0
Matanzas Creek Winery
 139 0 0
Truck Tops USA
Santa Rosa 		40 0 0
Seneca Family of Agencies
 30 1 1
United Rentals
 35 0 0
Sonoma County Pub Works-Central Landfill
 34 1 1
Dunham School
 175 1 1
Benziger Family Winery
 25 0 0
Santa Rosa Liquor and Deli
 95 0 0
LA Hacienda del Toro
 58 0 0
Michael Ellis School for Dog Trainers
 31 0 0
Westerbeke Ranch
 25 0 0
Bellevue Union Sch Dist-Bellevue School
 380 0 0
Saints Peter & Paul Russian Church
 25 0 0
Sonoma County Parks-Putnam Park
 52 0 0
Hessel Church
 116 0 0
Lasseter Family Winery
 75 0 0
Deerfield Ranch Winery LLC
 35 0 0
Gravenstein School District-Gravenstein
 398 1 1
Salt & Stone Restaurant
 80 0 0
Adair B.r. Cohn, LLC
 155 0 0
Imagery Estate Winery
 135 0 0
Sonoma Botanical Garden
 35 0 0
Arrowood Vineyards & Winery
 44 0 0
Adair Kunde, LLC
 250 0 0
Hamel Family Wines
 59 0 0
Saint Anne's Crossing Winery
 55 0 0
Kenwood Vineyards and Winery
 50 0 0
Tips Roadside
 86 0 0
Landmark Vineyards, Ltd.
 175 0 0
Gravenstein Business Park
 50 0 0
Fritsch Industrial Park
 36 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.