Official EPA Records
Mariposa Public Utility Dist
Official EPA contamination & sampling records · California, CA
What official records show
Health violations
37
All 37 resolved · Most recent: October 2012
PFAS detected (UCMR 5)
None
0 monitoring samples — no detections above MRL
Above MCL level (monitoring)
None
No PFAS above EPA MCL thresholds in monitoring data
EPA compliance records for Mariposa Public Utility Dist (PWSID: CA2210001) in California, CA show 37 health-based violations recorded in EPA SDWIS, all resolved and no PFAS detections above the minimum reporting level in EPA UCMR 5 monitoring. All records on this page are sourced from EPA SDWIS and the UCMR 5 dataset. This is official monitoring data — not a health risk determination.
Health-Based Violation History
Source: EPA SDWIS (Safe Drinking Water Information System). A health-based violation means a contaminant exceeded the legal Maximum Contaminant Level (MCL) or a required treatment technique was not met during the violation period. Resolved violations indicate the utility returned to compliance.
| Contaminant | Violation date |
|---|---|
| Oct 2012 | |
| Jul 2012 | |
| Jul 2012 | |
| Apr 2012 | |
| Apr 2012 | |
| Jan 2012 | |
| Jan 2012 | |
| Apr 2011 | |
| Apr 2011 | |
| Jan 2011 | |
| Jan 2011 | |
| Jul 2009 | |
| Apr 2009 | |
| Jan 2009 | |
| Jul 2008 | |
| Apr 2008 | |
| Jan 2008 | |
| Oct 2007 | |
| Jul 2007 | |
| Apr 2007 | |
| Jan 2007 | |
| Oct 2006 | |
| Jul 2006 | |
| Apr 2006 | |
| Apr 2006 | |
| Apr 2005 | |
| Apr 2005 | |
| Jan 2005 | |
| Jan 2005 | |
| Oct 2004 | |
| Oct 2004 | |
| Jul 2004 | |
| Jul 2004 | |
| Apr 2004 | |
| Apr 2004 | |
| Jan 2004 | |
| Jan 2004 |
Showing 37 health-based violations. View full violation history on EPA ECHO ↗
What this does not mean
- —Violations do not indicate current non-compliance. A health-based violation that is marked resolved means the utility has returned to compliance per EPA records. Historic violations are shown for transparency, not to imply ongoing risk.
- —PFAS detections above MRL are not themselves violations. UCMR 5 monitoring is a surveillance program. Detection does not mean the utility violated a regulation. The 2024 EPA PFAS rule (MCLs for PFOA, PFOS, etc.) has a compliance deadline of 2029.
- —This page does not assess health risk. WaterUtilityReport.com presents official government records — we do not make health risk determinations, safety certifications, or compliance judgments. Consult a licensed water quality specialist or physician for health advice.
- —Records may be incomplete. EPA SDWIS and UCMR 5 represent what was reported to the EPA. Not all utilities or contaminants are covered. Small systems (<10,000 people) may not have been required to participate in UCMR 5 monitoring.
Independent Verification
Get your water tested by a certified lab
EPA compliance data shows what utilities report to regulators. An independent test from a certified laboratory confirms what is actually coming out of your tap at the point of use. Labs in California can test for PFAS (EPA Method 533 or 537.1), lead, nitrates, bacteria, and more.
Official Records FAQs
Official Data Sources
EPA SDWIS — Compliance & Violations
EPA ECHO: Mariposa Public Utility Dist Detailed Facility ReportEPA UCMR 5 — PFAS Monitoring Data
EPA UCMR 5 Program OverviewEPA PFAS Rule (April 2024)
EPA PFAS in Drinking Water RuleRelated pages
Public drinking water datasets may not include every recent test, private well result, household plumbing issue, or local advisory. Use this page as a starting point, not as a substitute for official guidance, your utility's Consumer Confidence Report, or professional testing.
Water Utility Report summarizes public records from official federal, state, utility, or testing datasets where available. For urgent health or compliance questions, contact your utility, local health department, or the EPA directly. How Water Utility Report uses public drinking water data