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Public water system record

City of Willits

Serves Willits, Mendocino County, CA · 6,175 people served

Federal records show no health-based violations and no monitoring or reporting issues for City of Willits in the last ten years.

  • CA2310004
  • WILLITS
  • CA
  • 6,175 served

System profile

Source water Surface water
ZIP 95490
EPA system ID CA2310004

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
0

Key facts

  • City of Willits draws water from 1 well and 1 surface water intake.
  • Most recent formal enforcement: compliance order (no penalty) by California, August 2015.
  • Record on file since 1992, with 13 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 2,574 unknown out of 2,574 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.

None since October 2016, and no monitoring or reporting violations either.

Full record since 1992

EPA's records for City of Willits go back to 1992. Before October 19, 2016 they list 13 health-based violations (13 resolved) and 1 monitoring or reporting violation.

Violations that began in Health-based Monitoring and reporting
1990s 1 0
2000s 2 0
2010 to October 18, 2016 10 1

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

Show all 13 health-based violations before October 19, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0897 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Oct 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0896 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jul 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0951 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jul 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Apr 1, 2015 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 Jan 1, 2015 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 Jul 1, 2013 Resolved
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.065 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
 Apr 1, 2013 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Apr 1, 2012 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Jan 1, 2008 Resolved
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
 Jan 1, 2008 Resolved
Total Coliform
Contaminant limit exceeded
 Dec 1, 1992 Resolved

Enforcement actions

California regulators took 5 formal enforcement actions against City of Willits between 2008 and 2015. The most recent was a compliance order (no penalty) in August 2015.

Date By Action Violations covered
Aug 4, 2015 California Compliance order (no penalty) 7 violations (7 health-based): Total Trihalomethanes (TTHMs)
Oct 7, 2013 California Compliance order (no penalty) 2 violations (2 health-based): Haloacetic Acids (HAA5)
May 9, 2012 California Compliance order (no penalty) 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule
Sep 19, 2011 California Compliance order (no penalty) 1 violation: Total Coliform
Jan 14, 2008 California Compliance order (no penalty) 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule

Where the water comes from

City of Willits draws water from 1 well and 1 surface water intake.

Annual water quality report

City of Willits 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