EPA public water records · 06055
Napa County, California
Find listed community water systems and their documented follow-up in federal fiscal 2026Q3.
- Systems with linked histories
- 19
- Systems with unresolved health-based records
- 8
- Of those, systems with a formally addressed health-based record
- 1
These counts cover the linked records shown here. A county listing can cover only part of the county or reflect a mailing location.
Find your water system
- AMERICAN CANYON, CITY OFCA2810005 · California · 1 violation records · 0 unresolved health-based in this snapshot
- BERRYESSA HIGHLANDSCA2810013 · California · 2 violation records · 0 unresolved health-based in this snapshot
- BERRYESSA PINES WATER SYSTEMCA2810009 · California · 7 violation records · 1 unresolved health-based in this snapshot
- CALISTOGA, CITY OFCA2810002 · California · 5 violation records · 0 unresolved health-based in this snapshot
- CAPELL VALLEY ESTATESCA2800543 · California · 3 violation records · 1 unresolved health-based in this snapshot
- CIRCLE OAKS WATER DISTRICTCA2800521 · California · 1 violation records · 0 unresolved health-based in this snapshot
- HESS WINERYCA2801016 · California · 3 violation records · 1 unresolved health-based in this snapshot
- HOWELL MOUNTAIN MUTUAL WATER COMPANYCA2810001 · California · 3 violation records · 0 unresolved health-based in this snapshot
- LA TIERRA HEIGHTS MUTUALCA2800525 · California · 5 violation records · 0 unresolved health-based in this snapshot
- MEYERS WATER CO.CA2800530 · California · 3 violation records · 0 unresolved health-based in this snapshot
- MILTON ROAD WATER COMPANYCA2801080 · California · 2 violation records · 1 unresolved health-based in this snapshot
- NAPA RIVER RANCHCA2800531 · California · 17 violation records · 1 unresolved health-based in this snapshot
- R RANCH AT THE LAKECA2800593 · California · 5 violation records · 1 unresolved health-based in this snapshot
- SPANISH FLAT WATER DISTRICTCA2810014 · California · 7 violation records · 1 unresolved health-based in this snapshot
- ST. HELENA, CITY OFCA2810004 · California · 9 violation records · 0 unresolved health-based in this snapshot
- TOWN OF YOUNTVILLECA2810007 · California · 1 violation records · 0 unresolved health-based in this snapshot
- TUCKER ACRES MUTUAL WATER CO.CA2800516 · California · 3 violation records · 0 unresolved health-based in this snapshot
- VAILIMA ESTATES MUTUAL WATERCA2800532 · California · 1 violation records · 0 unresolved health-based in this snapshot
- VETERANS HOME OF CALIFORNIACA2810008 · California · 2 violation records · 1 unresolved health-based in this snapshot
EPA data and scope
How to read the records
The enforcement snapshot is federal fiscal 2026Q3. The EPA archive labels its violation file October 13, 2026. EPA says federal reporting can lag by several months. For current advisories, check your utility or local drinking-water authority.
- We matched active community water systems by public water system ID between EPA’s system search and SDWIS inventory. We show violations with a recorded noncompliance, initial reporting or return-to-compliance date from 2021 onward, plus earlier records listed as Addressed or Unaddressed.
- EPA’s health-based flag identifies violations of contaminant or disinfectant limits or treatment requirements. Monitoring and reporting violations describe required tests or reports. Neither category measures household exposure.
- Addressed means EPA records formal enforcement on a violation that remains unresolved in the snapshot. Unaddressed means no formal action is recorded for an unresolved violation. Resolved can mean compliance was restored, the rule ceased to apply, or further action was unnecessary. Archived is a separate status.
- We count a violation once per water system and group its distinct linked actions. Conflicting records are set aside. Places are EPA-listed search locations and can include mailing locations. Use the provider name and system ID to identify your service.
EPA data dictionary and files · EPA reporting and enforcement FAQ · Find an annual water quality report · How to get the report from your utility