Tapcensus

Water quality for ZIP code 95421

ZIP 95421 covers Cazadero and Timber Cove 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

Cazadero Water Company, Inc. (puc) CA4900508 · Community water system · Groundwater under influence of surface water
Serves 525 people Rules violated, past 3 years 3 Unresolved 2 Last sanitary survey Oct 9, 2024 Distance 7.6 mi
View system details EPA facility report

Other community water systems in Sonoma County

128 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Timber Cove County Water District
 190 2 8.8 mi
Sunrise Mountain Mutual Water Company
 100 0 9.9 mi
Redwood Heights Mutual Water Company
 30 1 10.2 mi
Sonoma County Mutual Water Company
 40 0 10.7 mi
Austin Creek Mutual (springhill)
 150 0 11.1 mi
Huckleberry Mutual Water Company
 45 1 11.3 mi
Armstrong Valley-Cal Water Service (puc)
 539 0 11.6 mi
Austin Acres Mutual Water Company
 82 0 11.9 mi
Magic Mountain Mutual Water Company
 171 0 12.0 mi
Sonoma County Csa 41-Jenner
 406 0 12.4 mi
Sweetwater Springs Cwd Guerneville
 5,156 0 12.7 mi
Rains Creek Water District
 208 0 13.0 mi
South Cloverdale Water Company
 90 2 13.2 mi
Six Acres Water Company
 66 2 13.6 mi
Sweetwater Springs Cwd Monte Rio
 3,531 0 13.7 mi
Rancho del Paradiso-Cal Water Svc (puc)
 110 0 13.8 mi
Bridgehaven Park
 30 2 14.0 mi
Cloverdale, City of
Cloverdale		 8,710 1 14.1 mi
Odd Fellows Recreation Club
 557 0 14.4 mi
Noel Heights-Cal Water Service (puc)
 86 0 14.5 mi
Hilton Mutual Water Company
 36 1 14.7 mi
Palomino Lakes Mutual Water Co.
 300 0 14.7 mi
California-American Geyserville (puc)
 1,050 0 14.7 mi
Gill Creek Mutual Water Company
 290 0 15.2 mi
Clear Creek Water Company
 40 0 15.3 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
Camp Liahona Redwoods
 150 0 0
Fort Ross School District
 100 0 0
Padmasambhava Peace Institute
 28 0 0
Ratna Ling Retreat
 37 0 0
Fort Ross Vineyard
 100 0 0
Cazadero Performing Arts Camp
 301 0 0
Csp-Fort Ross State Park
 3,501 0 0
Fort Ross Lodge, LLC
 33 0 0
Timber Cove Inn
 38 0 0
Sonoma County Parks-Stillwater Cove
 70 1 1
Camp Royaneh
 70 0 0
Ocean Cove Lodge Bar & Grill
 100 0 0
East Austin Creek Mutual Water Company
 32 0 0
Lake Sonoma Marina
 51 0 0
Csp-Salt Point State Park
 3,513 0 0
Csp-Armstrong Redwoods State Reserve
 611 0 0
U.s. Army Corps-Lake Sonoma Headquarters
 52 0 0
Gurdjieff Foundation
 40 0 0
Sbragia Winery
 68 0 0
Bella Vineyards and Wine Caves
 45 0 0
Ferrari-Carano Winery
 75 1 1
Dutcher Crossing Winery
 40 0 0
Michel-Schlumberger Fine Wine Estate
 50 0 0
Preston Winery
 55 0 0
Cast Estate Vineyards & Cellars
 50 0 0
E String Cellars
 54 0 0
Zichichi Winery
 41 0 0
Fritz Winery and Vineyard
 26 0 0
Quivira Vineyards
 31 1 0
Lambert Bridge Winery
Healdsburg 		38 0 0
Truett & Hurst Winery
 35 0 0
Chateau Diana
 64 0 0
Johnson's Beach Resort
 200 0 0
Passalacqua Winery
 25 0 0
Horicon School
 100 0 0
Rued Vineyards
 26 0 0
Dry Creek Vineyard
 36 0 0
Amista Vineyards
 51 0 0
Dry Creek Store
 60 0 0
Casini Ranch Campground
 442 0 0
Stewarts Point Water System
 29 0 0
Timber Crest Farms
 26 0 0
Korbel Brothers Winery
 296 0 0
Csp-Goat Rock State Beach
 402 0 0
E & J Gallo Winery-Sonoma
 124 0 0
Pedroncelli Winery
 25 0 0
Duncans Mills Trading Company
 45 0 0
Blue Heron Restaurant
 50 1 1
Mauritson Family Winery
 40 0 0
Duncans Mills Camping Club
 127 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.