MARIPOSA, CA · Mariposa County
MPWD-COULTERVILLE CSA 1 Water System
Consumer Confidence Report status
MPWD-COULTERVILLE CSA 1 must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for MPWD-COULTERVILLE CSA 1.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 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)
- CA2210901
- System type
- Community Water System
- Population served
- 193
- Service connections
- 83
- Ownership
- local government
- Water source
- groundwater (wells)
MPWD-COULTERVILLE CSA 1 is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 193 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 2010 and 2022, all of which EPA lists as closed. Nothing has been added since 2022.
All 2 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Total Coliform Rules.
Violation history
Monitoring, Routine (RTCR)
—Revised Total Coliform Rule
February 1, 2022 – February 28, 2022
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 2010 – December 31, 2010
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| February 1, 2022 – February 28, 2022 | Monitoring, Routine (RTCR) | Revised Total Coliform Rule | — | Resolved |
| December 1, 2010 – December 31, 2010 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- April 20, 2022State Administrative/Compliance Order without penalty issued7 linked violations
- August 1, 2011State Administrative/Compliance Order without penalty issued2 linked violations
- January 31, 2011State Violation/Reminder Notice1 linked violation
- February 29, 2008State Compliance achieved60 linked violations
Common questions
Is MPWD-COULTERVILLE CSA 1 required to publish a Consumer Confidence Report?
- Yes. MPWD-COULTERVILLE CSA 1 is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MPWD-COULTERVILLE CSA 1’s next Consumer Confidence Report due?
- MPWD-COULTERVILLE CSA 1’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MPWD-COULTERVILLE CSA 1 have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MPWD-COULTERVILLE CSA 1.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
LUTHEY JR., JOHN
209-966-5356
MARIPOSA, CA 95338