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Public water system record

Winterhaven Mobile Estates

Serves an area of Los Angeles County, CA · 56 people served

Federal records show 25 health-based violations and 2 monitoring/reporting issues for Winterhaven Mobile Estates in the last ten years. The most serious issue in this window was a Arsenic violation that EPA lists as archived, not resolved.

  • CA1900961
  • LAKE HUGHES
  • CA
  • 56 served

System profile

Source water Groundwater
ZIP 93532
EPA system ID CA1900961

Verify this system on EPA ECHO →

Health-based violations, last 10 years
25
Resolved
0
Unresolved
0
Archived by EPA
25
Any acute record
No
Monitoring issues, last 10 years
2

Key facts

  • Winterhaven Mobile Estates draws water from 1 well.
  • Highest measured level in the last 10 years: Arsenic, 76 µg/L, federal limit 10 µg/L (7.6 times the limit), 2020.
  • Most recent formal enforcement: compliance order (no penalty) by California, June 2025.
  • Record on file since 1984, with 9 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 21 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
Arsenic
Contaminant limit exceeded
Measured 54 µg/L, federal limit 10 µg/L (5.4 times the limit)
 330 Apr 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 59 µg/L, federal limit 10 µg/L (5.9 times the limit)
 330 Jan 1, 2024 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 35 µg/L, federal limit 10 µg/L (3.5 times the limit)
 330 Oct 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 50 µg/L, federal limit 10 µg/L (5 times the limit)
 330 Jul 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 68 µg/L, federal limit 10 µg/L (6.8 times the limit)
 330 Apr 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 28 µg/L, federal limit 10 µg/L (2.8 times the limit)
 330 Jan 1, 2023 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 61 µg/L, federal limit 10 µg/L (6.1 times the limit)
 330 Oct 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 49 µg/L, federal limit 10 µg/L (4.9 times the limit)
 330 Jul 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 49 µg/L, federal limit 10 µg/L (4.9 times the limit)
 330 Apr 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 49 µg/L, federal limit 10 µg/L (4.9 times the limit)
 330 Jan 1, 2022 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
 330 Oct 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 57 µg/L, federal limit 10 µg/L (5.7 times the limit)
 330 Jul 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 63 µg/L, federal limit 10 µg/L (6.3 times the limit)
 330 Apr 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 64 µg/L, federal limit 10 µg/L (6.4 times the limit)
 330 Jan 1, 2021 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 56 µg/L, federal limit 10 µg/L (5.6 times the limit)
 330 Oct 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 45 µg/L, federal limit 10 µg/L (4.5 times the limit)
 330 Jul 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 76 µg/L, federal limit 10 µg/L (7.6 times the limit)
 330 Apr 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 51 µg/L, federal limit 10 µg/L (5.1 times the limit)
 330 Jan 1, 2020 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 45 µg/L, federal limit 10 µg/L (4.5 times the limit)
 330 Jul 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 53 µg/L, federal limit 10 µg/L (5.3 times the limit)
 330 Apr 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 49 µg/L, federal limit 10 µg/L (4.9 times the limit)
 330 Jan 1, 2018 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 51 µg/L, federal limit 10 µg/L (5.1 times the limit)
 330 Oct 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 51 µg/L, federal limit 10 µg/L (5.1 times the limit)
 330 Jul 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 59 µg/L, federal limit 10 µg/L (5.9 times the limit)
 330 Apr 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No
Arsenic
Contaminant limit exceeded
Measured 60 µg/L, federal limit 10 µg/L (6 times the limit)
 330 Jan 1, 2017 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
 No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Revised Total Coliform Rule
Monitoring violation
 Jul 1, 2024 Resolved
Nitrate
Monitoring and reporting
 Jan 1, 2017 Resolved

Full record since 1984

EPA's records for Winterhaven Mobile Estates go back to 1984. Before October 19, 2016 they list 9 health-based violations (1 resolved, 8 archived by EPA without a recorded fix) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1980s 0 1
2010 to October 18, 2016 9 1
October 19, 2016 to 2019 7 1
2020s 18 1

Most recent health-based violation before October 19, 2016: Arsenic, began April 2016, Archived.

Show all 9 health-based violations before October 19, 2016
Contaminant Start date Status
Arsenic
Contaminant limit exceeded
Measured 0.051 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
 Apr 1, 2016 Archived
Arsenic
Contaminant limit exceeded
Measured 0.057 mg/L, federal limit 0.01 mg/L (5.7 times the limit)
 Jan 1, 2016 Archived
Arsenic
Contaminant limit exceeded
Measured 0.054 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
 Oct 1, 2015 Archived
Arsenic
Contaminant limit exceeded
Measured 0.05 mg/L, federal limit 0.01 mg/L (5 times the limit)
 Jul 1, 2015 Archived
Arsenic
Contaminant limit exceeded
Measured 0.046 mg/L, federal limit 0.01 mg/L (4.6 times the limit)
 Apr 1, 2015 Archived
Arsenic
Contaminant limit exceeded
 Oct 1, 2014 Archived
Arsenic
Contaminant limit exceeded
Measured 0.053 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
 Apr 1, 2014 Archived
Arsenic
Contaminant limit exceeded
Measured 0.0525 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
 Jan 1, 2014 Archived
Total Coliform
Contaminant limit exceeded
 Jul 1, 2011 Resolved

Enforcement actions

California regulators and EPA took 5 formal enforcement actions against Winterhaven Mobile Estates between 2011 and 2025. The most recent was a compliance order (no penalty) in June 2025.

Date By Action Violations covered
Jun 9, 2025 California Compliance order (no penalty) 1 violation: Revised Total Coliform Rule
Aug 8, 2019 EPA Compliance order (no penalty) 33 violations (33 health-based): Arsenic
Jul 12, 2018 California Compliance order (no penalty) 1 violation: Nitrate
Apr 9, 2015 California Compliance order (no penalty) 33 violations (33 health-based): Arsenic
Nov 29, 2011 California Compliance order (no penalty) 1 violation (1 health-based): Total Coliform

What the violations mean

Arsenic

25 incidents

Arsenic exceeded the federal limit

Long-term arsenic exposure is linked to cancer and cardiovascular effects

Where the water comes from

Winterhaven Mobile Estates draws water from 1 well.

Annual water quality report

Winterhaven Mobile Estates 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 Winterhaven Mobile Estates 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