Community Water System · PWSID 090605160

Dd Mobile Home Park

Serves 300 peopleGroundwaterOwner: PrivateThermal, California
3 open treatment violations.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2009: 93 violations. 4 over the limit · 8 treatment lapses · 45 missed or late tests · 36 notices or reports. Most recent began 2025-09-01.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

4Over the limit
8Treatment lapse3 open
45Missed or late test1 open
36Notice or report4 open

More violations on record than 99% of active water systems in California. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

20052009 · Missed or late test: 120102013 · Missed or late test: 22013 · Notice or report: 32013 · Notice or report: 32015 · Missed or late test: 120152016 · Over the limit: 12016 · Missed or late test: 12016 · Notice or report: 12017 · Treatment lapse: 12017 · Missed or late test: 12018 · Missed or late test: 22019 · Treatment lapse: 12020 · Missed or late test: 42020 · Missed or late test: 42020 · Notice or report: 120202021 · Treatment lapse: 42021 · Treatment lapse: 42021 · Missed or late test: 42021 · Missed or late test: 42021 · Notice or report: 72021 · Notice or report: 72021 · Notice or report: 72021 · Notice or report: 72022 · Missed or late test: 82022 · Missed or late test: 82022 · Missed or late test: 82022 · Missed or late test: 82022 · Notice or report: 22023 · Over the limit: 22023 · Missed or late test: 32023 · Missed or late test: 32023 · Notice or report: 82023 · Notice or report: 82023 · Notice or report: 82023 · Notice or report: 82024 · Over the limit: 12024 · Treatment lapse: 22024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Notice or report: 82024 · Notice or report: 82024 · Notice or report: 82024 · Notice or report: 82025 · Missed or late test: 102025 · Missed or late test: 102025 · Missed or late test: 102025 · Missed or late test: 102025 · Missed or late test: 102025 · Notice or report: 62025 · Notice or report: 62025 · Notice or report: 62025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
4% over the limit · 49% treatment lapse · 848% missed or late test · 4539% notice or report · 36

Across California, 52% of violations are missed or late tests and 29% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 3 results on file · action level 15 ppb

9.5 ppb
below 5 ppb
below 1 ppb

Open now (8)

  1. 2025-04-01Public NoticePN Violation for NPDWR ViolationOpen
  2. 2025-03-01Public NoticePN Violation for NPDWR ViolationOpen
  3. 2025-02-01Public NoticePN Violation for NPDWR ViolationOpen
  4. 2024-06-20Groundwater RuleFailure To Address DeficiencyOpen
  5. 2024-04-01Public NoticePN Violation for NPDWR ViolationOpen
  6. 2022-10-29Lead and Copper RuleLead Consumer NoticeOpen
  7. 2021-05-01Groundwater Rule ×2Failure To Address DeficiencyOpen

Every violation on record

  1. 2025-09-01Revised Total Coliform RuleMONBack in compliance
  2. 2025-07-01Revised Total Coliform RuleMONBack in compliance
  3. 2025-07-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  4. 2025-07-01FluorideMonitoring, RegularBack in compliance
  5. 2025-06-01Revised Total Coliform RuleRPTBack in compliance
  6. 2025-05-01Revised Total Coliform RuleRPTBack in compliance
  7. 2025-04-01Public NoticePN Violation for NPDWR ViolationOpen
  8. 2025-04-01Revised Total Coliform RuleMONBack in compliance
  9. 2025-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  10. 2025-04-01FluorideMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2025-03-01Public NoticePN Violation for NPDWR ViolationOpen
  12. 2025-03-01Revised Total Coliform RuleMONBack in compliance
  13. 2025-02-01Public NoticePN Violation for NPDWR ViolationOpen
  14. 2025-02-01Revised Total Coliform RuleMONBack in compliance
  15. 2025-01-01Revised Total Coliform RuleRPTBack in compliance
  16. 2025-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  17. 2024-11-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  18. 2024-10-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  19. 2024-10-01FluorideMonitoring, RegularBack in compliance
  20. 2024-09-01Revised Total Coliform RuleRPTBack in compliance
  21. 2024-08-01Revised Total Coliform RuleRPTBack in compliance
  22. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  23. 2024-07-01Revised Total Coliform RuleRPTBack in compliance
  24. 2024-06-20Groundwater RuleFailure To Address DeficiencyOpen
  25. 2024-06-20Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
Show the other 62 entries
  1. 2024-06-20Groundwater RuleFailure To Address DeficiencyBack in compliance
  2. 2024-04-01Public NoticePN Violation for NPDWR ViolationOpen
  3. 2024-04-01ArsenicMCL, Averagemeasured 0.0710 MG/LPeriod ended · no return to compliance on file
  4. 2024-03-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2024-03-01Revised Total Coliform RuleMONBack in compliance
  6. 2024-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  7. 2024-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2024-01-01FluorideMonitoring, RegularBack in compliance
  9. 2024-01-01ArsenicMonitoring, RegularBack in compliance
  10. 2023-12-01Revised Total Coliform RuleRPTBack in compliance
  11. 2023-11-01Revised Total Coliform RuleRPTBack in compliance
  12. 2023-10-01Revised Total Coliform RuleRPTBack in compliance
  13. 2023-10-01ArsenicMCL, Averagemeasured 0.1255 MG/LPeriod ended · no return to compliance on file
  14. 2023-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  15. 2023-07-01ArsenicMCL, Averagemeasured 0.1247 MG/LPeriod ended · no return to compliance on file
  16. 2023-06-01Revised Total Coliform RuleRPTBack in compliance
  17. 2023-05-01Revised Total Coliform RuleRPTBack in compliance
  18. 2023-04-01Revised Total Coliform RuleRPTBack in compliance
  19. 2023-02-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  20. 2023-02-01Revised Total Coliform RuleMONBack in compliance
  21. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  22. 2023-01-01FluorideMonitoring, RegularBack in compliance
  23. 2022-11-01Revised Total Coliform RuleMONBack in compliance
  24. 2022-10-29Lead and Copper RuleLead Consumer NoticeOpen
  25. 2022-10-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  26. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  27. 2022-09-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  28. 2022-09-01Revised Total Coliform RuleMONBack in compliance
  29. 2022-08-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  30. 2022-08-01Revised Total Coliform RuleMONBack in compliance
  31. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  32. 2022-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2021-10-01Revised Total Coliform RuleRPTBack in compliance
  34. 2021-09-01Revised Total Coliform RuleRPTBack in compliance
  35. 2021-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  36. 2021-05-01Groundwater Rule ×2Failure To Address DeficiencyOpen
  37. 2021-05-01Public Notice ×4PN Violation for NPDWR ViolationBack in compliance
  38. 2021-05-01Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  39. 2021-04-01Revised Total Coliform RuleRPTBack in compliance
  40. 2021-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  41. 2021-01-01FluorideMonitoring, RegularBack in compliance
  42. 2021-01-01ArsenicMonitoring, RegularBack in compliance
  43. 2020-12-01Revised Total Coliform RuleRPTBack in compliance
  44. 2020-11-01Revised Total Coliform RuleMONBack in compliance
  45. 2020-01-01Trihalomethanes (TTHM)Monitoring, Routine (IDSE)Period ended · no return to compliance on file
  46. 2020-01-01Total Haloacetic Acids (HAA5)Monitoring, Routine (IDSE)Period ended · no return to compliance on file
  47. 2020-01-01SodiumMonitoring, RegularPeriod ended · no return to compliance on file
  48. 2019-10-01DBP Stage 1Treatment Technique No Certif. OperatorBack in compliance
  49. 2018-07-01FluorideMonitoring, RegularBack in compliance
  50. 2018-07-01ArsenicMonitoring, RegularBack in compliance
  51. 2017-09-21Groundwater RuleFailure To Address DeficiencyBack in compliance
  52. 2017-01-01NitrateMonitoring, RegularBack in compliance
  53. 2016-07-01FluorideMCL, Averagemeasured 5.20 MG/LBack in compliance
  54. 2016-04-01Revised Total Coliform RuleOtherBack in compliance
  55. 2016-01-01FluorideMonitoring, RegularBack in compliance
  56. 2015-01-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  57. 2013-10-01Dbp Stage 2Failure Submit IDSE/Subpart V Plan RptBack in compliance
  58. 2013-07-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  59. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  60. 2013-06-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  61. 2013-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  62. 2009-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance

System details

Population served300
Service connections76
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityThermal
EPA ZIP on file92274

Areas served

    Reading this record

    Dd Mobile Home Park is a community water system that draws from groundwater and serves about 300 people in Thermal, California. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

    Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

    Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.