Community Water System · PWSID OK3001934

Oaks Mobile Home Park

Serves 250 peopleSurface Water PurchasedOwner: PrivateLadera Ranch, California
1 open treatment violation.

Open for: Lead service line inventory. 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 1993: 57 violations. 1 treatment lapse · 43 missed or late tests · 13 notices or reports. Most recent began 2025-08-01.

None of them is a measurement of contaminated water.

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

0Over the limit
1Treatment lapse1 open
43Missed or late test
13Notice or report8 open

More violations on record than 98% 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

1993 · Missed or late test: 119952000200520102012 · Notice or report: 12013 · Missed or late test: 12013 · Notice or report: 12014 · Notice or report: 12015 · Notice or report: 120152016 · Notice or report: 12017 · Missed or late test: 32017 · Missed or late test: 32019 · Missed or late test: 22019 · Notice or report: 12020 · Missed or late test: 12020 · Notice or report: 120202021 · Missed or late test: 52021 · Missed or late test: 52021 · Missed or late test: 52021 · Notice or report: 12022 · Missed or late test: 42022 · Missed or late test: 42022 · Notice or report: 12023 · Notice or report: 12024 · Treatment lapse: 12024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Missed or late test: 82024 · Notice or report: 22025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Missed or late test: 182025 · Notice or report: 12025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
2% treatment lapse · 175% missed or late test · 4323% notice or report · 13

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

0 ppb
0 ppb
0 ppb

Open now (9)

  1. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  2. 2024-10-17Lead service line inventoryRPTOpen
  3. 2024-10-17Lead service line inventoryTTOpen
  4. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  5. 2023-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  6. 2022-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  7. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  8. 2020-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  9. 2019-12-02Consumer Confidence RuleCCR Inadequate ReportingOpen

Every violation on record

  1. 2025-08-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2025-08-01ChloramineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  4. 2025-07-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  5. 2025-07-01ChloramineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2025-06-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  7. 2025-06-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  8. 2025-05-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  9. 2025-05-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  10. 2025-04-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  11. 2025-04-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  12. 2025-03-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  13. 2025-03-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  14. 2025-02-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  15. 2025-02-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  16. 2025-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  17. 2025-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  18. 2025-01-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  19. 2025-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  20. 2024-12-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  21. 2024-12-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  22. 2024-11-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  23. 2024-11-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  24. 2024-10-17Lead service line inventoryRPTOpen
  25. 2024-10-17Lead service line inventoryTTOpen
Show the other 32 entries
  1. 2024-10-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2024-10-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  4. 2024-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  5. 2024-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2023-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  7. 2022-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  8. 2022-04-01Revised Total Coliform RuleMONBack in compliance
  9. 2022-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  10. 2022-03-01Revised Total Coliform RuleMONBack in compliance
  11. 2022-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  12. 2021-09-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  13. 2021-09-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  14. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportOpen
  15. 2021-04-01Revised Total Coliform RuleMONBack in compliance
  16. 2021-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  17. 2021-02-01Revised Total Coliform RuleMONBack in compliance
  18. 2020-10-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  19. 2020-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  20. 2019-12-02Consumer Confidence RuleCCR Inadequate ReportingOpen
  21. 2019-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  22. 2019-10-01Revised Total Coliform RuleMONBack in compliance
  23. 2017-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  24. 2017-09-01Revised Total Coliform RuleMONBack in compliance
  25. 2017-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  26. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  27. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  28. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  29. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  30. 2013-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  31. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  32. 1993-06-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance

System details

Population served250
Service connections96
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerPrivate
StatusActive
CityLadera Ranch
EPA ZIP on file92694

Areas served

  • Creek County

Reading this record

Oaks Mobile Home Park is a community water system that draws from surface water purchased and serves about 250 people in Ladera Ranch, 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.