Public water system record

DD Mobile Home Park

Serves Salton City, Imperial County, CA · 300 people served

Federal records show 11 health-based violations and 79 monitoring/reporting issues for DD Mobile Home Park in the last ten years, including an unresolved Groundwater Rule violation.

  • 090605160
  • THERMAL
  • CA
  • 300 served

System profile

Source water Groundwater
ZIP 92274
EPA system ID 090605160

Verify this system on EPA ECHO →

Health-based violations, last 10 years
11
Resolved
8
Unresolved
3
Any acute record
No
Monitoring issues, last 10 years
79

Key facts

  • DD Mobile Home Park draws water from 1 well.
  • Highest measured level in the last 10 years: Arsenic, 0.1255 mg/L, federal limit 0.01 mg/L (13 times the limit), 2023.
  • Most recent formal enforcement: emergency order under section 1431 of the Safe Drinking Water Act by EPA, January 2023.
  • Record on file since 2004, with 33 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 76 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
Groundwater Rule
Treatment technique failure
140 Jun 20, 2024 Resolved No
Groundwater Rule
Treatment technique failure
140 Jun 20, 2024 Active No
Arsenic
Contaminant limit exceeded
Measured 0.071 mg/L, federal limit 0.01 mg/L (7.1 times the limit)
330 Apr 1, 2024 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.1255 mg/L, federal limit 0.01 mg/L (13 times the limit)
330 Oct 1, 2023 Resolved No
Arsenic
Contaminant limit exceeded
Measured 0.1247 mg/L, federal limit 0.01 mg/L (12 times the limit)
330 Jul 1, 2023 Resolved No
Groundwater Rule
Treatment technique failure
140 May 1, 2021 Resolved No
Groundwater Rule
Treatment technique failure
140 May 1, 2021 Active No
Groundwater Rule
Treatment technique failure
140 May 1, 2021 Resolved No
Groundwater Rule
Treatment technique failure
140 May 1, 2021 Active No
Stage 1 Disinfection Byproducts Rule
Treatment technique failure
210 Oct 1, 2019 Resolved No
Groundwater Rule
Treatment technique failure
140 Sep 21, 2017 Resolved 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
RPT
Nov 1, 2025 Resolved
Lead and Copper Rule
Monitoring and reporting
Oct 1, 2025 Active
Revised Total Coliform Rule
RPT
Oct 1, 2025 Resolved
Chlorine
Monitoring and reporting
Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Public Notice
OTHER
Sep 1, 2025 Active
Revised Total Coliform Rule
RPT
Sep 1, 2025 Resolved
Public Notice
OTHER
Jul 1, 2025 Active
Revised Total Coliform Rule
Monitoring violation
Jul 1, 2025 Resolved
Chlorine
Monitoring and reporting
Jul 1, 2025 Resolved
Fluoride
Monitoring and reporting
Jul 1, 2025 Resolved
Revised Total Coliform Rule
RPT
Jun 1, 2025 Resolved
Revised Total Coliform Rule
RPT
May 1, 2025 Resolved
Public Notice
OTHER
Apr 1, 2025 Active
Revised Total Coliform Rule
RPT
Apr 1, 2025 Resolved
Chlorine
Monitoring and reporting
Apr 1, 2025 Resolved
Fluoride
Monitoring and reporting
Apr 1, 2025 Resolved
Public Notice
OTHER
Mar 1, 2025 Active
Revised Total Coliform Rule
RPT
Mar 1, 2025 Resolved
Public Notice
OTHER
Feb 1, 2025 Active
Revised Total Coliform Rule
Monitoring violation
Feb 1, 2025 Resolved
Revised Total Coliform Rule
RPT
Jan 1, 2025 Resolved
Chlorine
Monitoring and reporting
Jan 1, 2025 Resolved
Revised Total Coliform Rule
Monitoring violation
Nov 1, 2024 Resolved
Chlorine
Monitoring and reporting
Oct 1, 2024 Resolved
Fluoride
Monitoring and reporting
Oct 1, 2024 Resolved
Revised Total Coliform Rule
RPT
Sep 1, 2024 Resolved
Revised Total Coliform Rule
RPT
Aug 1, 2024 Resolved
Consumer Confidence Rule
OTHER
Jul 1, 2024 Resolved
Revised Total Coliform Rule
RPT
Jul 1, 2024 Resolved
Public Notice
OTHER
Jun 20, 2024 Resolved
Public Notice
OTHER
Jun 20, 2024 Resolved
Public Notice
OTHER
Apr 1, 2024 Active
Public Notice
OTHER
Mar 1, 2024 Resolved
Revised Total Coliform Rule
Monitoring violation
Mar 1, 2024 Resolved
Chlorine
Monitoring and reporting
Jan 1, 2024 Resolved
Nitrate
Monitoring and reporting
Jan 1, 2024 Resolved
Fluoride
Monitoring and reporting
Jan 1, 2024 Resolved
Arsenic
Monitoring and reporting
Jan 1, 2024 Resolved
Revised Total Coliform Rule
RPT
Dec 1, 2023 Resolved
Revised Total Coliform Rule
RPT
Nov 1, 2023 Resolved
Revised Total Coliform Rule
RPT
Oct 1, 2023 Resolved
Consumer Confidence Rule
OTHER
Jul 1, 2023 Resolved
Revised Total Coliform Rule
RPT
Jun 1, 2023 Resolved
Revised Total Coliform Rule
RPT
May 1, 2023 Resolved
Revised Total Coliform Rule
RPT
Apr 1, 2023 Resolved
Public Notice
OTHER
Feb 1, 2023 Resolved
Revised Total Coliform Rule
Monitoring violation
Feb 1, 2023 Resolved
Chlorine
Monitoring and reporting
Jan 1, 2023 Resolved
Fluoride
Monitoring and reporting
Jan 1, 2023 Resolved
Revised Total Coliform Rule
Monitoring violation
Nov 1, 2022 Resolved
Lead and Copper Rule
Monitoring and reporting
Oct 29, 2022 Active
E. coli
Monitoring and reporting
Oct 1, 2022 Resolved
Chlorine
Monitoring and reporting
Oct 1, 2022 Resolved
Public Notice
OTHER
Sep 1, 2022 Resolved
Revised Total Coliform Rule
Monitoring violation
Sep 1, 2022 Resolved
Public Notice
OTHER
Aug 1, 2022 Resolved
Revised Total Coliform Rule
Monitoring violation
Aug 1, 2022 Resolved
Chlorine
Monitoring and reporting
Jul 1, 2022 Resolved
Nitrate
Monitoring and reporting
Jan 1, 2022 Resolved
Revised Total Coliform Rule
RPT
Oct 1, 2021 Resolved
Revised Total Coliform Rule
RPT
Sep 1, 2021 Resolved
Chlorine
Monitoring and reporting
Jul 1, 2021 Resolved
Public Notice
OTHER
May 1, 2021 Resolved
Public Notice
OTHER
May 1, 2021 Resolved
Public Notice
OTHER
May 1, 2021 Resolved
Public Notice
OTHER
May 1, 2021 Resolved
Revised Total Coliform Rule
RPT
Apr 1, 2021 Resolved
Chlorine
Monitoring and reporting
Apr 1, 2021 Resolved
Fluoride
Monitoring and reporting
Jan 1, 2021 Resolved
Arsenic
Monitoring and reporting
Jan 1, 2021 Resolved
Revised Total Coliform Rule
RPT
Dec 1, 2020 Resolved
Revised Total Coliform Rule
Monitoring violation
Nov 1, 2020 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
Jan 1, 2020 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
Jan 1, 2020 Resolved
Fluoride
Monitoring and reporting
Jul 1, 2018 Resolved
Arsenic
Monitoring and reporting
Jul 1, 2018 Resolved
Nitrate
Monitoring and reporting
Jan 1, 2017 Resolved
Revised Total Coliform Rule
OTHER
Apr 1, 2016 Resolved
Stage 2 Disinfection Byproducts Rule
Monitoring and reporting
Oct 1, 2013 Resolved

Full record since 2004

EPA's records for DD Mobile Home Park go back to 2004. Before October 19, 2016 they list 33 health-based violations (33 resolved) and 28 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 12 8
2010 to October 18, 2016 21 20
October 19, 2016 to 2019 2 3
2020s 9 74

Most recent health-based violation before October 19, 2016: Fluoride, began July 2016, Resolved.

Show all 33 health-based violations before October 19, 2016
Contaminant Start date Status
Fluoride
Contaminant limit exceeded
Measured 5.2 mg/L, federal limit 4 mg/L (1.3 times the limit)
Jul 1, 2016 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.0565 mg/L, federal limit 0.01 mg/L (5.7 times the limit)
Apr 1, 2014 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.0565 mg/L, federal limit 0.01 mg/L (5.7 times the limit)
Jan 1, 2014 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05575 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
Oct 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
Oct 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.0565 mg/L, federal limit 0.01 mg/L (5.7 times the limit)
Jul 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.056 mg/L, federal limit 0.01 mg/L (5.6 times the limit)
Jul 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05475 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
Apr 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.055 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
Jan 1, 2013 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05388 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
Oct 1, 2012 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05275 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
Jul 1, 2012 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05325 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
Apr 1, 2012 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05125 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
Jan 1, 2012 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05188 mg/L, federal limit 0.01 mg/L (5.2 times the limit)
Oct 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05125 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
Jul 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.053 mg/L, federal limit 0.01 mg/L (5.3 times the limit)
Apr 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05467 mg/L, federal limit 0.01 mg/L (5.5 times the limit)
Jan 1, 2011 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05375 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
Oct 1, 2010 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Jul 1, 2010 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Apr 1, 2010 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Jan 1, 2010 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Oct 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Jul 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Apr 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Jan 1, 2009 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Oct 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.03706 mg/L, federal limit 0.01 mg/L (3.7 times the limit)
Jul 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05133 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
Apr 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.05133 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
Jan 1, 2008 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.0505 mg/L, federal limit 0.01 mg/L (5.1 times the limit)
Oct 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.059 mg/L, federal limit 0.01 mg/L (5.9 times the limit)
Jul 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Measured 0.0536 mg/L, federal limit 0.01 mg/L (5.4 times the limit)
Apr 1, 2007 Resolved
Arsenic
Contaminant limit exceeded
Jan 1, 2006 Resolved

Enforcement actions

EPA took 4 formal enforcement actions against DD Mobile Home Park between 2008 and 2023, filed as 34 records in EPA's data. The most recent was an emergency order under section 1431 of the Safe Drinking Water Act in January 2023.

Date By Action Violations covered
Jan 31, 2023 EPA Emergency order under section 1431 of the Safe Drinking Water Act 3 violations (3 health-based): Arsenic
Sep 5, 2013 EPA Compliance order (no penalty) 5 violations (2 health-based): E. coli, Total Coliform, Arsenic
Mar 9, 2012 EPA Compliance order (no penalty) 2 violations (2 health-based): Arsenic
Jan 23, 2008 EPA Signed compliance agreement 26 violations (23 health-based): Arsenic

What the violations mean

Groundwater Rule

7 incidents

The system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).

The utility had to notify customers about each of these violations.

Arsenic

3 incidents

Arsenic exceeded the federal limit

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

Stage 1 Disinfection Byproducts Rule

1 incident

The system did not meet a treatment requirement of the Stage 1 Disinfectants and Disinfection Byproducts Rule

Byproducts form when disinfectants react with natural material in water. Long-term exposure above federal limits may increase cancer risk

Where the water comes from

DD Mobile Home Park draws water from 1 well.

Annual water quality report

DD Mobile Home Park 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 DD Mobile Home Park 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 EPA Region 9.