Public water system record
Mariposa Public Utility Dist
Serves Mariposa, Mariposa County, CA · 2,000 people served
Federal records show no health-based violations and no monitoring or reporting issues for Mariposa Public Utility Dist in the last ten years.
System profile
Source water
Surface water
ZIP
95338
EPA system ID
CA2210001
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Mariposa Public Utility Dist draws water from 4 wells and 2 surface water intakes.
- Most recent formal enforcement: compliance order (no penalty) by California, November 2012.
- Record on file since 1989, with 47 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 680 service lines.
Check whether Mariposa Public Utility Dist serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016, and no monitoring or reporting violations either.
Full record since 1989
EPA's records for Mariposa Public Utility Dist go back to 1989. Before October 19, 2016 they list 47 health-based violations (47 resolved) and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 1990s | 1 | 1 |
| 2000s | 29 | 2 |
| 2010 to October 18, 2016 | 17 | 0 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2013, Resolved.
Show all 47 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0891 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.06 mg/L (1.6 times the limit)
|
Oct 1, 2012 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1396 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
|
Oct 1, 2012 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2012 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2012 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1368 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
|
Jul 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
|
Jul 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Apr 1, 2012 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1105 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Apr 1, 2012 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1096 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jan 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0615 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Apr 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0815 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Apr 1, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0708 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2011 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jan 1, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0628 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jul 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0653 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2009 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0668 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0689 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2008 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0758 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Apr 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0703 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0783 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Oct 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Jul 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0763 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Apr 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1013 mg/L, federal limit 0.06 mg/L (1.7 times the limit)
|
Jan 1, 2007 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1225 mg/L, federal limit 0.06 mg/L (2 times the limit)
|
Oct 1, 2006 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1233 mg/L, federal limit 0.06 mg/L (2.1 times the limit)
|
Jul 1, 2006 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1218 mg/L, federal limit 0.06 mg/L (2 times the limit)
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0902 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2006 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0888 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2005 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1147 mg/L, federal limit 0.06 mg/L (1.9 times the limit)
|
Apr 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0947 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2005 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1153 mg/L, federal limit 0.06 mg/L (1.9 times the limit)
|
Jan 1, 2005 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1196 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
Oct 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1866 mg/L, federal limit 0.06 mg/L (3.1 times the limit)
|
Oct 1, 2004 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1056 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jul 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1841 mg/L, federal limit 0.06 mg/L (3.1 times the limit)
|
Jul 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1743 mg/L, federal limit 0.06 mg/L (2.9 times the limit)
|
Apr 1, 2004 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1232 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
Apr 1, 2004 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.157 mg/L, federal limit 0.06 mg/L (2.6 times the limit)
|
Jan 1, 2004 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2004 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1176 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
|
Jan 1, 2004 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 1995 | Resolved |
Enforcement actions
California regulators and EPA took 8 formal enforcement actions against Mariposa Public Utility Dist between 2006 and 2012. The most recent was a compliance order (no penalty) in November 2012.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 1, 2012 | California | Compliance order (no penalty) | 7 violations (7 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL |
| Aug 9, 2012 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| May 1, 2012 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Jul 21, 2011 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Apr 27, 2011 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Apr 15, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Oct 24, 2008 | California | Compliance order (no penalty) | 1 violation (1 health-based): CARBON, TOTAL |
| Apr 27, 2006 | EPA | Compliance order (no penalty) | 40 violations (40 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
Where the water comes from
Mariposa Public Utility Dist draws water from 4 wells and 2 surface water intakes. 1 other public water system has an interim connection to Mariposa Public Utility Dist.
Annual water quality report
Mariposa Public Utility Dist must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells