Tapcensus

Water quality for ZIP code 94567

Napa County, California, one of 10 ZIP codes in the county. 188 active public water systems serve the county; 56 had an EPA violation in the past three years.

Most likely your provider

Berryessa Estates (lbrid) CA2800526 · Community water system · Surface water
Serves 474 people Rules violated, past 3 years 0 Last sanitary survey Mar 28, 2022 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 Napa County

27 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Berryessa Pines Water System
 261 2 9.3 mi
Pacific Union College
 758 0 9.6 mi
Howell Mountain Mutual Water Company
 1,244 0 10.4 mi
LA Tierra Heights Mutual
 67 2 10.8 mi
Linda Falls Terrace Mutual
 35 0 10.8 mi
Linda Vista Mutual Water CO
 90 0 11.4 mi
Adventist Health St. Helena Hospital
 617 0 12.2 mi
Calistoga Farm Worker Center
 67 0 12.7 mi
Tucker Acres Mutual Water Co.
 200 1 12.9 mi
Vailima Estates Mutual Water
 25 0 13.1 mi
Calistoga, City of
Calistoga		 5,610 2 13.4 mi
River Ranch Farm Worker Center
 66 0 14.3 mi
St. Helena, City of
St. Helena		 5,386 2 14.6 mi
Spanish Flat Water District
 92 2 15.2 mi
Berryessa Highlands
 715 1 17.4 mi
R Ranch at the Lake
 20 2 18.4 mi
Capell Valley Estates
 208 2 20.8 mi
Town of Yountville
 2,785 0 21.6 mi
Veterans Home of California
 1,000 1 21.8 mi
Mondavi Farm Worker Center
 66 0 22.1 mi
Circle Oaks Water District
 500 0 22.8 mi
Hess Winery
 100 2 25.6 mi
Napa, City of
Napa		 84,804 0 28.4 mi
Napa River Ranch
 70 5 33.4 mi
Milton Road Water Company
 39 1 34.5 mi
All 28 community water systems in Napa County
Non-community systems in Napa County (160: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Napa County Schools: Pope Valley
 100 0 0
Outpost Wines
 30 0 0
Howell Mountain School
 100 1 1
O'shaughnessy Winery
 31 0 0
Maxville Lake Winery
 36 0 0
Mending Wall Winery
 37 0 0
Rancho la Jota
 40 0 0
Davis Estates
 84 0 0
Hunnicutt Winery
 35 0 0
Frank Family Vineyards
 25 0 0
Rombauer Vineyards
 50 0 0
Larkmead Vineyards
 31 0 0
Clos Pegase Winery
 45 1 1
Sterling Vineyards
 500 0 0
Cal Fire Sonoma-Lake-Napa Unit HQ
 65 0 0
Twomey Cellars
 43 0 0
Castello DI Amorosa
 98 1 1
Golden Haven Motel
 49 0 0
Titus Winery
 64 0 0
Chateau Montelena Winery
 26 0 0
Ehlers Estate
 42 0 0
Schramsberg Winery
 65 0 0
Duckhorn Vineyards
 25 0 0
Duffy's Napa Valley Rehab
 100 0 0
Joseph Cellars Winery
 32 0 0
Trinchero Winery
 263 0 0
Csp Bale Grist Mill State Historic Par
 185 0 0
Wine Country Inn
 60 1 1
St. Helena Purlieu LLC
 25 0 0
Napa Valley Reserve Water System
 49 1 0
Cairdean Winery
 30 1 0
Markham Vineyards
 38 0 0
Phelps Vineyards
 56 0 0
Beringer Vineyards
 300 0 0
Bennett Lane Winery
Calistoga 		83 0 0
Csp-Bothe-Napa Valley State Park
 586 0 0
Pcsh, LLC
 25 0 0
Fantesca Winery
 41 0 0
Lmr Main Street Partners LLC
 26 0 0
Rutherford Hill Mutual Water
 232 0 0
Sutter Home Winery
 244 0 0
Robert Keenan Winery
 48 0 0
Rutherford Hill Winery
 30 2 1
Kathryn Hall Winery
 28 0 0
Behrens Family Winery
 39 0 0
Round Hill Winery
 100 0 0
Quintessa Winery Water System
St. Helena 		33 0 0
Dakota Shy Winery
 58 1 0
Camp Berryessa
 25 0 0
Somerston Winery
 28 1 1
All non-community systems
About this data

Water systems are matched to Napa 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.