EPA public water records · 06013
Contra Costa County, California
Find listed community water systems and their documented follow-up in federal fiscal 2026Q3.
- Systems with linked histories
- 18
- Systems with unresolved health-based records
- 7
- Of those, systems with a formally addressed health-based record
- 0
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
- ANGLER S RANCH #3CA0707501 · California · 1 violation records · 0 unresolved health-based in this snapshot
- ANGLERS SUBDIVISION 4CA0707569 · California · 1 violation records · 0 unresolved health-based in this snapshot
- BELLA VISTA WATER SYSCA0707589 · California · 16 violation records · 1 unresolved health-based in this snapshot
- BETHEL ISLAND MUTUAL WATER COCA0707572 · California · 1 violation records · 0 unresolved health-based in this snapshot
- CASA MEDANOS WATER SYSTEMCA0707594 · California · 1 violation records · 0 unresolved health-based in this snapshot
- CLAYTON PALMS WATERCA0707603 · California · 1 violation records · 0 unresolved health-based in this snapshot
- COLONIA SANTA MARIACA0707517 · California · 3 violation records · 1 unresolved health-based in this snapshot
- DELTA MUTUAL WATER COMPANYCA0707573 · California · 18 violation records · 0 unresolved health-based in this snapshot
- DUTCH SLOUGH WATER WORKSCA0707519 · California · 1 violation records · 0 unresolved health-based in this snapshot
- OAKLEY MUTUAL WATER COMPANYCA0706004 · California · 20 violation records · 1 unresolved health-based in this snapshot
- ORWOOD RESORTCA0707545 · California · 3 violation records · 1 unresolved health-based in this snapshot
- RIVERVIEW MOBILE HOME PARKCA0707553 · California · 1 violation records · 0 unresolved health-based in this snapshot
- RIVERVIEW WATER ASSOCIATIONCA0707577 · California · 1 violation records · 0 unresolved health-based in this snapshot
- RUSSOS MOBILE PARKCA0707601 · California · 3 violation records · 1 unresolved health-based in this snapshot
- SANDMOUND MUTUALCA0707556 · California · 3 violation records · 1 unresolved health-based in this snapshot
- SANDY POINT MOBILE HOME PARKCA0707597 · California · 3 violation records · 1 unresolved health-based in this snapshot
- WILCOX STATION RANCHCA0707623 · California · 1 violation records · 0 unresolved health-based in this snapshot
- WILLOW PARK MARINACA0707507 · California · 21 violation records · 0 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