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Public water system record

Control Gorge Power Plant Ladwp

Serves Mesa, Inyo County, CA · 32 people served

Federal records show no health-based violations and 3 monitoring/reporting issues for Control Gorge Power Plant Ladwp in the last ten years.

  • CA1400155
  • LOS ANGELES
  • CA
  • 32 served

System profile

Source water Groundwater under direct influence
ZIP 90012
EPA system ID CA1400155

Verify this system on EPA ECHO →

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

Key facts

  • Control Gorge Power Plant Ladwp draws water from 1 spring.
  • Most recent formal enforcement: compliance order (no penalty) by California, November 2020.
  • Record on file since 2006, with 16 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 12 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.

None since October 2016.

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
Monitoring and reporting
 Oct 1, 2020 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Jan 1, 2020 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Jan 1, 2020 Resolved

Full record since 2006

EPA's records for Control Gorge Power Plant Ladwp go back to 2006. Before October 19, 2016 they list 16 health-based violations (16 resolved) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 15 0
2010 to October 18, 2016 1 2
2020s 0 3

Most recent health-based violation before October 19, 2016: Arsenic, began January 2010, Resolved.

Show all 16 health-based violations before October 19, 2016
Contaminant Start date Status
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
 Jan 1, 2010 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
 Oct 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.029 mg/L, federal limit 0.01 mg/L (2.9 times the limit)
 Jul 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Apr 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Jan 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Oct 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.036 mg/L, federal limit 0.01 mg/L (3.6 times the limit)
 Jul 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Apr 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Jan 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.034 mg/L, federal limit 0.01 mg/L (3.4 times the limit)
 Oct 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.033 mg/L, federal limit 0.01 mg/L (3.3 times the limit)
 Jul 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.033 mg/L, federal limit 0.01 mg/L (3.3 times the limit)
 Apr 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Jan 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Oct 1, 2006 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.035 mg/L, federal limit 0.01 mg/L (3.5 times the limit)
 Jul 1, 2006 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.036 mg/L, federal limit 0.01 mg/L (3.6 times the limit)
 Apr 1, 2006 Resolved

Enforcement actions

California regulators took 1 formal enforcement action against Control Gorge Power Plant Ladwp in 2020, filed as 2 records in EPA's data. The most recent was a compliance order (no penalty) in November 2020.

Date By Action Violations covered
Nov 6, 2020 California Compliance order (no penalty) 3 violations: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Lead and Copper Rule

Where the water comes from

Control Gorge Power Plant Ladwp draws water from 1 spring.

Annual water quality report

Control Gorge Power Plant Ladwp 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 Control Gorge Power Plant Ladwp 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