YOSEMITE NP, CA · Mariposa County
YOSEMITE NPS-YOSEMITE VALLEY Water System
Current status
1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA2210503
- System type
- Community Water System
- Population served
- 1,000
- Service connections
- 235
- Ownership
- federal government
- Water source
- groundwater (wells)
Violation history
Consumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2025
AddressedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2005 – November 14, 2006
Resolved
Addressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2025 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Addressed |
| July 1, 2005 – November 14, 2006 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
Addressed corrective action reported, pending final confirmationResolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Contact
TRUMM, MICHAEL
209-379-1055
YOSEMITE NP, CA 95389