Community Water System · PWSID OK1011101

Comanche Public Works Authority

Serves 1,649 peopleSurface WaterOwner: Local GovernmentComanche, Oklahoma
Nothing open right now.

On record since 1979: 90 violations. 57 over the limit · 4 treatment lapses · 29 missed or late tests. Most recent began 2025-08-01.

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

57Over the limit
4Treatment lapse
29Missed or late test
0Notice or report

More violations on record than 83% 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: 41980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 919801985199019952000200520102014 · Over the limit: 32014 · Over the limit: 32015 · Over the limit: 42015 · Over the limit: 420152016 · Over the limit: 42016 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Missed or late test: 12019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82019 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 82020 · Over the limit: 820202021 · Over the limit: 82021 · Over the limit: 82021 · Over the limit: 82021 · Over the limit: 82021 · Treatment lapse: 12021 · Missed or late test: 12022 · Over the limit: 82022 · Over the limit: 82022 · Over the limit: 82022 · Over the limit: 82022 · Treatment lapse: 12023 · Over the limit: 62023 · Over the limit: 62023 · Over the limit: 62023 · Treatment lapse: 12023 · Missed or late test: 102023 · Missed or late test: 102023 · Missed or late test: 102023 · Missed or late test: 102023 · Missed or late test: 102024 · Treatment lapse: 12024 · Missed or late test: 12025 · Missed or late test: 32025 · Missed or late test: 32025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
63% over the limit · 574% treatment lapse · 432% missed or late test · 29

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×+Trihalomethanes (TTHM)2023-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2023-07-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2023-04-01 · Trihalomethanes (TTHM): measured 0.1290 MG/L vs limit 0.0800 MG/L (1.6×)2023-04-01 · Trihalomethanes (TTHM): measured 0.1080 MG/L vs limit 0.0800 MG/L (1.3×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1190 MG/L vs limit 0.0800 MG/L (1.5×)2022-10-01 · Trihalomethanes (TTHM): measured 0.1200 MG/L vs limit 0.0800 MG/L (1.5×)2022-10-01 · Trihalomethanes (TTHM): measured 0.1490 MG/L vs limit 0.0800 MG/L (1.9×)2022-07-01 · Trihalomethanes (TTHM): measured 0.1170 MG/L vs limit 0.0800 MG/L (1.5×)2022-07-01 · Trihalomethanes (TTHM): measured 0.1350 MG/L vs limit 0.0800 MG/L (1.7×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1120 MG/L vs limit 0.0800 MG/L (1.4×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1300 MG/L vs limit 0.0800 MG/L (1.6×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1300 MG/L vs limit 0.0800 MG/L (1.6×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1070 MG/L vs limit 0.0800 MG/L (1.3×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1170 MG/L vs limit 0.0800 MG/L (1.5×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1010 MG/L vs limit 0.0800 MG/L (1.3×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2021-04-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1120 MG/L vs limit 0.0800 MG/L (1.4×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1080 MG/L vs limit 0.0800 MG/L (1.3×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2020-07-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2020-07-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2020-04-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2020-04-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2020-01-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0810 MG/L vs limit 0.0800 MG/L (1.0×)2019-07-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0970 MG/L vs limit 0.0800 MG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1130 MG/L vs limit 0.0800 MG/L (1.4×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1220 MG/L vs limit 0.0800 MG/L (1.5×)2018-04-01 · Trihalomethanes (TTHM): measured 0.1280 MG/L vs limit 0.0800 MG/L (1.6×)2018-01-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2017-10-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2017-07-01 · Trihalomethanes (TTHM): measured 0.1130 MG/L vs limit 0.0800 MG/L (1.4×)2017-04-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2017-01-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2016-04-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2016-01-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2015-10-01 · Trihalomethanes (TTHM): measured 0.1100 MG/L vs limit 0.0800 MG/L (1.4×)2015-07-01 · Trihalomethanes (TTHM): measured 0.1210 MG/L vs limit 0.0800 MG/L (1.5×)2015-04-01 · Trihalomethanes (TTHM): measured 0.1670 MG/L vs limit 0.0800 MG/L (2.1×)2015-01-01 · Trihalomethanes (TTHM): measured 0.1640 MG/L vs limit 0.0800 MG/L (2.0×)2014-10-01 · Trihalomethanes (TTHM): measured 0.1480 MG/L vs limit 0.0800 MG/L (1.8×)2014-07-01 · Trihalomethanes (TTHM): measured 0.1440 MG/L vs limit 0.0800 MG/L (1.8×)2014-01-01 · Trihalomethanes (TTHM): measured 0.1240 MG/L vs limit 0.0800 MG/L (1.6×)
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 3 results on file · action level 15 ppb

0 ppb
0 ppb
0 ppb

Every violation on record

  1. 2025-08-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  2. 2025-08-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  3. 2025-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  4. 2024-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  5. 2024-04-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.8900 RATIOPeriod ended · no return to compliance on file
  6. 2023-10-01Carbon, Total ×2Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2023-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  8. 2023-07-01Carbon, Total ×4Monitoring and Reporting (DBP)Back in compliance
  9. 2023-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2023-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1290 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2023-02-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  12. 2023-01-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.8700 RATIOPeriod ended · no return to compliance on file
  13. 2023-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2023-01-01ChloriteMonitoring and Reporting (DBP)Back in compliance
  15. 2023-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  16. 2022-10-01Carbon, TotalTreatment Technique Precursor Removalmeasured 0.8800 RATIOPeriod ended · no return to compliance on file
  17. 2022-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1200 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2022-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1170 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2022-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1120 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2022-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1300 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2021-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1170 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2021-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2021-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  25. 2021-01-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
Show the other 42 entries
  1. 2021-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2020-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1080 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2020-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2020-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2020-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2019-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2019-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2019-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2019-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1130 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1220 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2018-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  13. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1280 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1230 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1130 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1020 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1100 MG/L · limit 0.0800 MG/LBack in compliance
  24. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1210 MG/L · limit 0.0800 MG/LBack in compliance
  25. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1670 MG/L · limit 0.0800 MG/LBack in compliance
  26. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1640 MG/L · limit 0.0800 MG/LBack in compliance
  27. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1480 MG/L · limit 0.0800 MG/LBack in compliance
  28. 2014-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1440 MG/L · limit 0.0800 MG/LBack in compliance
  29. 2014-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1240 MG/L · limit 0.0800 MG/LBack in compliance
  30. 1980-09-30TurbidityMonitoring, RegularBack in compliance
  31. 1980-08-31TurbidityMonitoring, RegularBack in compliance
  32. 1980-07-31TurbidityMonitoring, RegularBack in compliance
  33. 1980-06-30TurbidityMonitoring, RegularBack in compliance
  34. 1980-05-31TurbidityMonitoring, RegularBack in compliance
  35. 1980-04-30TurbidityMonitoring, RegularBack in compliance
  36. 1980-03-31TurbidityMonitoring, RegularBack in compliance
  37. 1980-02-29TurbidityMonitoring, RegularBack in compliance
  38. 1980-01-31TurbidityMonitoring, RegularBack in compliance
  39. 1979-12-31TurbidityMonitoring, RegularBack in compliance
  40. 1979-11-30TurbidityMonitoring, RegularBack in compliance
  41. 1979-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  42. 1979-10-31TurbidityMonitoring, RegularBack in compliance

System details

Population served1,649
Service connections856
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityComanche
EPA ZIP on file73529

Areas served

  • Stephens County

Reading this record

Comanche Public Works Authority is a community water system that draws from surface water and serves about 1,649 people in Comanche, 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.