Tapcensus

Water quality for ZIP code 95404

ZIP 95404 covers Santa Rosa and Larkfield-Wikiup 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

Heights Mutual Water Company CA4900612 · Community water system · Ground water
Serves 363 people Rules violated, past 3 years 0 Last sanitary survey May 25, 2023 Distance 0.6 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
Wilshire Heights Mutual Water Company
 70 0 1.2 mi
Mark West Acres Mwc
 61 0 1.7 mi
Mark West Meadows Mutual Water
 31 1 1.8 mi
Riebli Mutual Water Company
 150 0 1.8 mi
Michele Mutual Water Company
 93 0 1.8 mi
Rolling Oaks Road Association
 25 0 1.9 mi
Loch Haven Mutual Water Company
 26 0 2.4 mi
End-O-Valley Mutual Water Company
 129 1 2.9 mi
Randal's Ranchette Mutual Water Company
 93 2 3.0 mi
California-American Larkfield (puc)
 7,911 0 3.6 mi
Rincon Valley Mobile Estates
 460 1 4.5 mi
Colonial Park
 342 0 4.7 mi
Mobile Home Estates
 403 2 4.7 mi
Stonegate Mobile Home Park
 196 0 4.8 mi
Shamrock Mobile Home Park
 188 1 5.2 mi
Santa Rosa, City of
Santa Rosa		 178,452 0 5.4 mi
Melita Heights Mutual Water Company
 64 2 5.5 mi
Crystals
Santa Rosa		 48 0 5.6 mi
Windsor, Town of
 25,561 0 5.7 mi
Brand Water Company
 112 0 6.0 mi
Holland Heights Mutual Water Company
 300 0 6.8 mi
Roseland Mobile Home Park
 130 0 7.1 mi
Leisure Mobile Home Park
 410 0 7.3 mi
Branger Mutual Water Company, Inc.
 300 1 7.4 mi
James Court Water System
 208 1 7.4 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
Urj Camp Newman
 705 0 0
Safari West
 99 0 0
Paradise Ridge Winery
 35 0 0
Pepperwood Environmental Center
 35 0 0
Petrified Forest
 304 0 0
Cloverleaf Ranch Summer Camp
 100 0 0
Sutter Santa Rosa Regional Hospital
 1,000 0 0
Triple S Ranch
 130 0 0
Hans Fahden Vineyards
 87 1 0
Kendall-Jackson Wine Center
 45 0 0
Chalk Hill Winery
 25 0 0
LA Cantera Racquet Club
 75 1 0
Roth Winery
 25 0 0
Valley of the Moon Plaza Shopping Center
 100 0 0
Northwest Prep Charter School
 325 1 0
Fritsch Industrial Park
 36 0 0
LA Crema Winery
 75 0 0
Martinelli Ranch
 52 0 0
Sugarloaf Water System
 42 0 0
Bricoleur Vineyards
 57 0 0
Verite Winery
 38 0 0
Hook & Ladder Vineyards and Winery
 35 0 0
Olivet Elementary School
 400 2 2
Michael Lucas Water System
 25 0 0
Campobello
 45 0 0
Saralee's Vineyard and Tasting Room
 84 0 0
Gray Water System
 50 0 0
Sunce Winery
 26 0 0
Ledson Winery and Vineyards
 128 0 0
Lancaster Estate Winery
 46 0 0
Boisset de Loach Winery
 33 0 0
Copain Wine Cellars
 26 0 0
Summerfield Waldorf School
 301 0 0
Willowside School
 460 1 1
Merriam Winery
 50 0 0
Vino Farms, Inc. Preston Ranch
 72 0 0
Oak Grove School District Office
 36 0 0
Saint Francis Winery-Wild Oak Vineyards
 50 0 0
J Vineyards & Winery
 50 0 0
Spider Web Ranch
 38 0 0
Santa Rosa Golf & Country Club
 250 0 0
Rodney Strong Vineyards
 150 0 0
Field Stone Winery
 27 0 0
Santa Rosa Liquor and Deli
 95 0 0
Bellevue Union Sch Dist-Bellevue School
 380 0 0
Matanzas Creek Winery
 139 0 0
Sonoma County Parks-Riverfront Park
 50 0 0
Childkind Laguna Preschool
 42 0 0
Rochioli Winery
 26 0 0
Gracianna Winery
 64 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.