Community Water System · PWSID OK1010401

Atoka

Serves 2,988 peopleSurface WaterOwner: Local GovernmentAtoka, Oklahoma
Nothing open right now.

On record since 1979: 50 violations. 6 over the limit · 23 treatment lapses · 20 missed or late tests · 1 notice or report. Most recent began 2025-04-01.

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

6Over the limit
23Treatment lapse
20Missed or late test
1Notice or report

More violations on record than 68% of active water systems in Oklahoma. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

1979 · Missed or late test: 41979 · Missed or late test: 41979 · Missed or late test: 41979 · Missed or late test: 41980 · Missed or late test: 51980 · Missed or late test: 51980 · Missed or late test: 51980 · Missed or late test: 51980 · Missed or late test: 519801981 · Missed or late test: 11982 · Missed or late test: 11983 · Missed or late test: 31983 · Missed or late test: 31983 · Missed or late test: 319851987 · Over the limit: 11988 · Missed or late test: 11989 · Missed or late test: 21989 · Missed or late test: 219901991 · Missed or late test: 119952000200520102012 · Notice or report: 12013 · Over the limit: 120152016 · Treatment lapse: 22016 · Treatment lapse: 22020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Treatment lapse: 72020 · Missed or late test: 120202021 · Treatment lapse: 12022 · Treatment lapse: 42022 · Treatment lapse: 42022 · Treatment lapse: 42022 · Treatment lapse: 42023 · Over the limit: 12023 · Treatment lapse: 72023 · Treatment lapse: 72023 · Treatment lapse: 72023 · Treatment lapse: 72023 · Treatment lapse: 72023 · Treatment lapse: 72023 · Treatment lapse: 72024 · Treatment lapse: 12024 · Missed or late test: 12025 · Over the limit: 32025 · Over the limit: 32025 · Over the limit: 32025 · Treatment lapse: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
12% over the limit · 646% treatment lapse · 2340% missed or late test · 202% notice or report · 1

Across Oklahoma, 73% of violations are missed or late tests and 19% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Total Haloacetic Acids (HAA5)Trihalomethanes (TTHM)2025-04-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2025-04-01 · Total Haloacetic Acids (HAA5): measured 0.0690 MG/L vs limit 0.0600 MG/L (1.2×)2025-01-01 · Total Haloacetic Acids (HAA5): measured 0.0650 MG/L vs limit 0.0600 MG/L (1.1×)2023-10-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2013-07-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)
Each dot is one over-the-limit violation: the measured value divided by the limit it broke, on a log scale. Most legal limits for chemicals are running averages set for a lifetime of drinking, so “just over” and “ten times over” are very different news. Hover a dot for the numbers.

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 4 results on file · action level 15 ppb

1.4 ppb
1.4 ppb
1.3 ppb
0 ppb

Every violation on record

  1. 2025-04-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9800 RATIOPeriod ended · no return to compliance on file
  2. 2025-04-01Total Haloacetic Acids (HAA5) ×2MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0650 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  4. 2024-10-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Period ended · no return to compliance on file
  5. 2024-08-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  6. 2023-10-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9900 RATIOPeriod ended · no return to compliance on file
  7. 2023-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  8. 2023-07-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9600 RATIOPeriod ended · no return to compliance on file
  9. 2023-04-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9600 RATIOPeriod ended · no return to compliance on file
  10. 2023-03-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  11. 2023-02-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  12. 2023-01-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9200 RATIOPeriod ended · no return to compliance on file
  13. 2023-01-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  14. 2022-12-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  15. 2022-12-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  16. 2022-10-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9600 RATIOPeriod ended · no return to compliance on file
  17. 2022-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  18. 2021-07-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.9900 RATIOPeriod ended · no return to compliance on file
  19. 2020-09-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  20. 2020-08-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  21. 2020-07-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  22. 2020-04-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  23. 2020-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  24. 2020-03-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  25. 2020-02-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
Show the other 24 entries
  1. 2020-01-01AsbestosMonitoring, RegularBack in compliance
  2. 2016-04-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  3. 2016-03-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Back in compliance
  4. 2013-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  6. 1991-08-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  7. 1989-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  8. 1989-01-01TurbidityMonitoring, RegularBack in compliance
  9. 1988-11-01TurbidityMonitoring, RegularBack in compliance
  10. 1987-04-01Coliform (Pre-TCR)MCL, Averagemeasured 80.00 Back in compliance
  11. 1983-12-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  12. 1983-11-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  13. 1983-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  14. 1982-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  15. 1981-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  16. 1980-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  17. 1980-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  18. 1980-08-31TurbidityMonitoring, RegularBack in compliance
  19. 1980-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  20. 1980-05-31TurbidityMonitoring, RegularBack in compliance
  21. 1979-11-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  22. 1979-11-30TurbidityMonitoring, RegularBack in compliance
  23. 1979-10-31TurbidityMonitoring, RegularBack in compliance
  24. 1979-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served2,988
Service connections1,364
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityAtoka
EPA ZIP on file74525

Areas served

  • Atoka County

Reading this record

Atoka is a community water system that draws from surface water and serves about 2,988 people in Atoka, Oklahoma. 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.