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Public water system record

Union Public Utility District

Serves Murphys, Calaveras County, CA · 4,774 people served

Federal records show 5 health-based violations and no monitoring/reporting issues for Union Public Utility District in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • CA0510001
  • MURPHYS
  • CA
  • 4,774 served

System profile

Source water Surface water
ZIP 95247
EPA system ID CA0510001

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
5
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
0

Key facts

  • Union Public Utility District draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit), 2020.
  • Most recent formal enforcement: compliance order (no penalty) by California, July 2020.
  • Record on file since 1987, with 6 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 740 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
 220 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jan 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.091 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Apr 1, 2020 Resolved No

Full record since 1987

EPA's records for Union Public Utility District go back to 1987. Before October 19, 2016 they list 6 health-based violations (6 resolved) and 6 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 5
2000s 6 1
2020s 5 0

Most recent health-based violation before October 19, 2016: Haloacetic Acids (HAA5), began January 2006, Resolved.

Show all 6 health-based violations before October 19, 2016
Contaminant Start date Status
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0643 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 Jan 1, 2006 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0839 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 Oct 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0908 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
 Jul 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1008 mg/L, federal limit 0.06 mg/L (1.7 times the limit)
 Apr 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.0868 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
 Jan 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.1073 mg/L, federal limit 0.06 mg/L (1.8 times the limit)
 Oct 1, 2004 Resolved

Enforcement actions

California regulators took 1 formal enforcement action against Union Public Utility District in 2020. The most recent was a compliance order (no penalty) in July 2020.

Date By Action Violations covered
Jul 15, 2020 California Compliance order (no penalty) 5 violations (5 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Total Trihalomethanes (TTHMs)

5 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Where the water comes from

Union Public Utility District draws water from 1 surface water intake.

Annual water quality report

Union Public Utility District 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