Community Water System · PWSID ID5160031

Oakley Valley Water Corporation

Serves 500 peopleGroundwaterOwner: PrivateOakley, Idaho
1 open treatment violation.

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 1995: 50 violations. 22 treatment lapses · 19 missed or late tests · 9 notices or reports. Most recent began 2025-06-01.

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
22Treatment lapse1 open
19Missed or late test2 open
9Notice or report

More violations on record than 94% of active water systems in Idaho. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

1995 · Treatment lapse: 119952000200520102012 · Notice or report: 12013 · Treatment lapse: 22014 · Treatment lapse: 22014 · Notice or report: 220152016 · Treatment lapse: 32016 · Treatment lapse: 32018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Missed or late test: 12020 · Treatment lapse: 120202022 · Missed or late test: 32022 · Missed or late test: 32023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72024 · Treatment lapse: 62024 · Treatment lapse: 62024 · Treatment lapse: 62024 · Missed or late test: 72024 · Missed or late test: 72024 · Missed or late test: 72024 · Missed or late test: 72024 · Notice or report: 62024 · Notice or report: 62024 · Notice or report: 62025 · Missed or late test: 12025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
44% treatment lapse · 2238% missed or late test · 1918% notice or report · 9

Across Idaho, 80% of violations are missed or late tests and 5% 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 10 results on file · action level 15 ppb

9 ppb
9 ppb
9 ppb
7 ppb
3 ppb
3 ppb
2 ppb
2 ppb
1 ppb
0 ppb

Open now (3)

  1. 2024-12-30Lead and Copper RuleLead Consumer NoticeOpen
  2. 2022-12-30Lead and Copper RuleLead Consumer NoticeOpen
  3. 2013-10-19Groundwater RuleFailure To Address DeficiencyOpen

Every violation on record

  1. 2025-06-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  2. 2024-12-30Lead and Copper RuleLead Consumer NoticeOpen
  3. 2024-12-29Public Notice ×5PN Violation for NPDWR ViolationBack in compliance
  4. 2024-12-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  5. 2024-12-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Period ended · no return to compliance on file
  6. 2024-11-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2024-10-31Groundwater Rule ×5Failure To Address DeficiencyBack in compliance
  8. 2024-10-01Groundwater RuleFailure To Address DeficiencyBack in compliance
  9. 2024-09-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  10. 2024-03-07Groundwater RuleFailure to Consult with StateBack in compliance
  11. 2024-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  12. 2024-01-01Revised Total Coliform RuleMONBack in compliance
  13. 2023-09-19E. ColiMonitoring, Source Water (GWR)Back in compliance
  14. 2023-08-01Revised Total Coliform RuleMONBack in compliance
  15. 2023-07-01Chlorine ×3Monitoring and Reporting (DBP)Back in compliance
  16. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  17. 2023-01-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  18. 2022-12-30Lead and Copper RuleLead Consumer NoticeOpen
  19. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  20. 2022-10-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  21. 2020-04-01Groundwater RuleFailure To Address DeficiencyBack in compliance
  22. 2018-11-01Groundwater Rule ×7Failure To Address DeficiencyBack in compliance
  23. 2018-01-01NitriteMonitoring, RegularBack in compliance
  24. 2016-11-25Groundwater Rule ×3Failure To Address DeficiencyBack in compliance
  25. 2014-03-30Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
Show the other 5 entries
  1. 2014-02-01Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  2. 2013-10-19Groundwater RuleFailure To Address DeficiencyOpen
  3. 2013-10-19Groundwater RuleFailure To Address DeficiencyBack in compliance
  4. 2012-03-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 1995-12-14Lead and Copper RuleOCCT/SOWT Study/RecommendationBack in compliance

System details

Population served500
Service connections178
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityOakley
EPA ZIP on file83346

Areas served

  • Cassia County

Reading this record

Oakley Valley Water Corporation is a community water system that draws from groundwater and serves about 500 people in Oakley, Idaho. 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.