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Public water system record

Mt. Konocti Mutual Water Company

Serves Clearlake Riviera, Lake County, CA · 4,360 people served

Federal records show 3 health-based violations and 1 monitoring/reporting issue for Mt. Konocti Mutual Water Company in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.

  • CA1710014
  • KELSEYVILLE
  • CA
  • 4,360 served

System profile

Source water Surface water
ZIP 95451
EPA system ID CA1710014

Verify this system on EPA ECHO →

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

Key facts

  • Mt. Konocti Mutual Water Company draws water from 1 surface water intake.
  • Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 66.9 µg/L, federal limit 60 µg/L (1.1 times the limit), 2019.
  • Most recent formal enforcement: compliance order (no penalty) by California, January 2021.
  • Record on file since 1986, with 2 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 1,574 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
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 64.8 µg/L, federal limit 60 µg/L (1.1 times the limit)
 220 Apr 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 66.9 µg/L, federal limit 60 µg/L (1.1 times the limit)
 220 Jan 1, 2019 Resolved No
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 64.9 µg/L, federal limit 60 µg/L (1.1 times the limit)
 220 Oct 1, 2018 Resolved 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
Monitoring and reporting
 Oct 1, 2020 Resolved

Full record since 1986

EPA's records for Mt. Konocti Mutual Water Company go back to 1986. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 2
2010 to October 18, 2016 2 0
October 19, 2016 to 2019 3 0
2020s 0 1

Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began April 2015, Resolved.

Show all 2 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0843 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2015 Resolved

Enforcement actions

California regulators took 3 formal enforcement actions against Mt. Konocti Mutual Water Company between 2015 and 2021. The most recent was a compliance order (no penalty) in January 2021.

Date By Action Violations covered
Jan 11, 2021 California Compliance order (no penalty) 1 violation: Lead and Copper Rule
Jan 22, 2019 California Compliance order (no penalty) 3 violations (3 health-based): Haloacetic Acids (HAA5)
Mar 11, 2015 California Compliance order (no penalty) 2 violations (2 health-based): Total Trihalomethanes (TTHMs)

What the violations mean

Haloacetic Acids (HAA5)

3 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Where the water comes from

Mt. Konocti Mutual Water Company draws water from 1 surface water intake.

Annual water quality report

Mt. Konocti Mutual Water Company 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