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Public water system record

Uc Desert Research and Extension Center

On record as serving Imperial County, CA · Serves 30 people

Federal records show 1 health-based violation and 3 monitoring/reporting issues for Uc Desert Research and Extension Center in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.

  • CA1300571
  • HOLTVILLE
  • CA
  • 30 served

System profile

Source water Purchased surface water
ZIP 92250
EPA system ID CA1300571

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
0
Unresolved
1
Any acute record
No
Monitoring issues, last 10 years
3

Key facts

  • Uc Desert Research and Extension Center buys its water from Imperial Irrigation District.
  • Most recent formal enforcement: compliance order with a penalty by California, July 2025.
  • Record on file since 1982, with 41 health-based violations before October 20, 2016.

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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
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
 350 Oct 17, 2024 Active No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
LEAD AND COPPER RULE REVISIONS
RPT
 Oct 17, 2024 Active
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.

Full record since 1982

EPA's records for Uc Desert Research and Extension Center go back to 1982. Before October 20, 2016 they list 41 health-based violations (41 resolved) and 24 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 24
2000s 22 0
2010 to October 19, 2016 19 0
2020s 1 3

Most recent health-based violation before October 20, 2016: Total Trihalomethanes (TTHMs), began October 2015, Resolved.

Show all 41 health-based violations before October 20, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 102.8 µg/L, federal limit 80 µg/L (1.3 times the limit)
 Oct 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 124 µg/L, federal limit 80 µg/L (1.6 times the limit)
 Jul 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 116.5 µg/L, federal limit 80 µg/L (1.5 times the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 124 µg/L, federal limit 80 µg/L (1.6 times the limit)
 Jan 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 124 µg/L, federal limit 80 µg/L (1.6 times the limit)
 Oct 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.14 mg/L, federal limit 0.08 mg/L (1.8 times the limit)
 Jul 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.16 mg/L, federal limit 0.08 mg/L (2 times the limit)
 Apr 1, 2014 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.11 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 Jul 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.127 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
 Apr 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1223 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 Jan 1, 2013 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Oct 1, 2012 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.2 mg/L, federal limit 0.08 mg/L (2.5 times the limit)
 Jul 1, 2012 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Apr 1, 2012 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.104 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jan 1, 2012 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 Oct 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jul 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2011 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Jan 1, 2010 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09285 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Oct 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.099275 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.10353 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Apr 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.10053 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jan 1, 2009 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09725 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Oct 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09413 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097125 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092625 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2008 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0903 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.08488 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09613 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092875 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2007 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0913 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2006 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09245 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2006 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09243 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Oct 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0984 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0922 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Apr 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.080075 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 Apr 1, 2005 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09173 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07563 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 Jan 1, 2005 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.08008 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
 Apr 1, 2004 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086725 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2004 Resolved

Enforcement actions

California regulators took 4 formal enforcement actions against Uc Desert Research and Extension Center between 2007 and 2025. The most recent was a compliance order with a penalty in July 2025.

Date By Action Violations covered
Jul 11, 2025 California Compliance order with a penalty 2 violations: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Sep 2, 2014 California Compliance order with a penalty 7 violations (7 health-based): Total Trihalomethanes (TTHMs)
May 2, 2011 California Compliance order (no penalty) 13 violations (13 health-based): Total Trihalomethanes (TTHMs)
Jan 22, 2007 California Compliance order (no penalty) 22 violations (22 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)

What the violations mean

LEAD AND COPPER RULE REVISIONS

1 incident

The system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Uc Desert Research and Extension Center buys its water from Imperial Irrigation District. It lists no wells or intakes of its own.

Buys water from

  • Imperial Irrigation District Imperial, CA

Annual water quality report

Uc Desert Research and Extension Center 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.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Uc Desert Research and Extension Center for a copy.

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