Tapcensus

Water quality for ZIP code 94508

ZIP 94508 covers Angwin and Deer Park in 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

Pacific Union College CA2810012 · Community water system · Ground water
Serves 758 people Rules violated, past 3 years 0 Last sanitary survey Jun 24, 2022 Distance 0.4 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
Howell Mountain Mutual Water Company
 1,244 0 1.1 mi
LA Tierra Heights Mutual
 67 2 1.4 mi
Linda Falls Terrace Mutual
 35 0 1.4 mi
Linda Vista Mutual Water CO
 90 0 2.0 mi
Adventist Health St. Helena Hospital
 617 0 2.9 mi
Vailima Estates Mutual Water
 25 0 3.9 mi
Tucker Acres Mutual Water Co.
 200 1 4.9 mi
Calistoga Farm Worker Center
 67 0 5.0 mi
River Ranch Farm Worker Center
 66 0 5.1 mi
St. Helena, City of
St. Helena		 5,386 2 5.2 mi
Calistoga, City of
Calistoga		 5,610 2 7.9 mi
Berryessa Estates (lbrid)
 474 0 9.1 mi
Berryessa Pines Water System
 261 2 9.2 mi
Spanish Flat Water District
 92 2 12.2 mi
Town of Yountville
 2,785 0 13.2 mi
R Ranch at the Lake
 20 2 13.4 mi
Veterans Home of California
 1,000 1 13.4 mi
Mondavi Farm Worker Center
 66 0 14.1 mi
Berryessa Highlands
 715 1 14.5 mi
Capell Valley Estates
 208 2 16.1 mi
Hess Winery
 100 2 16.9 mi
Circle Oaks Water District
 500 0 17.0 mi
Napa, City of
Napa		 84,804 0 20.4 mi
Napa River Ranch
 70 5 25.2 mi
Milton Road Water Company
 39 1 26.2 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
Howell Mountain School
 100 1 1
Mending Wall Winery
 37 0 0
O'shaughnessy Winery
 31 0 0
Outpost Wines
 30 0 0
Rancho la Jota
 40 0 0
Hunnicutt Winery
 35 0 0
Napa County Schools: Pope Valley
 100 0 0
Rombauer Vineyards
 50 0 0
Maxville Lake Winery
 36 0 0
Davis Estates
 84 0 0
Titus Winery
 64 0 0
Cal Fire Sonoma-Lake-Napa Unit HQ
 65 0 0
Duckhorn Vineyards
 25 0 0
Ehlers Estate
 42 0 0
Napa Valley Reserve Water System
 49 1 0
Frank Family Vineyards
 25 0 0
Trinchero Winery
 263 0 0
Wine Country Inn
 60 1 1
Larkmead Vineyards
 31 0 0
Markham Vineyards
 38 0 0
St. Helena Purlieu LLC
 25 0 0
Cairdean Winery
 30 1 0
Beringer Vineyards
 300 0 0
Phelps Vineyards
 56 0 0
Csp Bale Grist Mill State Historic Par
 185 0 0
Pcsh, LLC
 25 0 0
Fantesca Winery
 41 0 0
Lmr Main Street Partners LLC
 26 0 0
Sutter Home Winery
 244 0 0
Castello DI Amorosa
 98 1 1
Sterling Vineyards
 500 0 0
Schramsberg Winery
 65 0 0
Clos Pegase Winery
 45 1 1
Rutherford Hill Mutual Water
 232 0 0
Twomey Cellars
 43 0 0
V. Sattui Winery
 45 2 1
Wheeler Farms Winery
 43 0 0
The Ranch Winery
 200 1 1
William Hill Winery
 25 1 0
Rutherford Hill Winery
 30 2 1
Kathryn Hall Winery
 28 0 0
Csp-Bothe-Napa Valley State Park
 586 0 0
Robert Keenan Winery
 48 0 0
Round Hill Winery
 100 0 0
Milat Winery
 128 0 0
Quintessa Winery Water System
St. Helena 		33 0 0
Joseph Cellars Winery
 32 0 0
Stags Leap Wine Cellars North
 64 0 0
Dakota Shy Winery
 58 1 0
Del Dotto Winery
 27 0 0
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.