Community Water System · PWSID OK2001609

Indiahoma Public Works Authority

Serves 350 peopleSurface Water PurchasedOwner: Local GovernmentIndiahoma, Oklahoma
Nothing open that measures the water, but 1 open testing or paperwork violation.

A missed test is not evidence of bad water. It also is not evidence of good water: for that period nobody checked.

On record since 1979: 68 violations. 37 over the limit · 2 treatment lapses · 28 missed or late tests · 1 notice or report. Most recent began 2025-07-01.

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

37Over the limit
2Treatment lapse
28Missed or late test1 open
1Notice or report

More violations on record than 77% 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: 21979 · Missed or late test: 219801981 · Missed or late test: 119851987 · Over the limit: 1199019951998 · Missed or late test: 21998 · Missed or late test: 2200020052009 · Missed or late test: 12010 · Missed or late test: 120102012 · Treatment lapse: 12014 · Missed or late test: 12015 · Missed or late test: 120152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Missed or late test: 22016 · Missed or late test: 22017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42019 · Over the limit: 22019 · Over the limit: 22020 · Over the limit: 32020 · Over the limit: 32020 · Over the limit: 32020 · Missed or late test: 22020 · Missed or late test: 220202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Missed or late test: 12022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42022 · Over the limit: 42022 · Missed or late test: 32022 · Missed or late test: 32022 · Missed or late test: 32023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42023 · Over the limit: 42023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72023 · Missed or late test: 72024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Treatment lapse: 12024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42024 · Missed or late test: 42024 · Notice or report: 12025 · Over the limit: 32025 · Over the limit: 32025 · Over the limit: 32025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
54% over the limit · 373% treatment lapse · 241% missed or late test · 281% 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×+Trihalomethanes (TTHM)2025-07-01 · Trihalomethanes (TTHM): measured 0.1860 MG/L vs limit 0.0800 MG/L (2.3×)2025-04-01 · Trihalomethanes (TTHM): measured 0.1870 MG/L vs limit 0.0800 MG/L (2.3×)2025-01-01 · Trihalomethanes (TTHM): measured 0.1850 MG/L vs limit 0.0800 MG/L (2.3×)2024-10-01 · Trihalomethanes (TTHM): measured 0.1770 MG/L vs limit 0.0800 MG/L (2.2×)2024-07-01 · Trihalomethanes (TTHM): measured 0.1940 MG/L vs limit 0.0800 MG/L (2.4×)2024-04-01 · Trihalomethanes (TTHM): measured 0.1650 MG/L vs limit 0.0800 MG/L (2.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.1520 MG/L vs limit 0.0800 MG/L (1.9×)2023-10-01 · Trihalomethanes (TTHM): measured 0.1520 MG/L vs limit 0.0800 MG/L (1.9×)2023-07-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2022-10-01 · Trihalomethanes (TTHM): measured 0.1120 MG/L vs limit 0.0800 MG/L (1.4×)2022-07-01 · Trihalomethanes (TTHM): measured 0.1550 MG/L vs limit 0.0800 MG/L (1.9×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1900 MG/L vs limit 0.0800 MG/L (2.4×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1860 MG/L vs limit 0.0800 MG/L (2.3×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1900 MG/L vs limit 0.0800 MG/L (2.4×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1780 MG/L vs limit 0.0800 MG/L (2.2×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1390 MG/L vs limit 0.0800 MG/L (1.7×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1440 MG/L vs limit 0.0800 MG/L (1.8×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1440 MG/L vs limit 0.0800 MG/L (1.8×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1360 MG/L vs limit 0.0800 MG/L (1.7×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1930 MG/L vs limit 0.0800 MG/L (2.4×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1400 MG/L vs limit 0.0800 MG/L (1.8×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1760 MG/L vs limit 0.0800 MG/L (2.2×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1760 MG/L vs limit 0.0800 MG/L (2.2×)2018-04-01 · Trihalomethanes (TTHM): measured 0.1790 MG/L vs limit 0.0800 MG/L (2.2×)2018-01-01 · Trihalomethanes (TTHM): measured 0.1750 MG/L vs limit 0.0800 MG/L (2.2×)2017-10-01 · Trihalomethanes (TTHM): measured 0.1720 MG/L vs limit 0.0800 MG/L (2.1×)2017-07-01 · Trihalomethanes (TTHM): measured 0.1550 MG/L vs limit 0.0800 MG/L (1.9×)2017-04-01 · Trihalomethanes (TTHM): measured 0.1420 MG/L vs limit 0.0800 MG/L (1.8×)2017-01-01 · Trihalomethanes (TTHM): measured 0.1490 MG/L vs limit 0.0800 MG/L (1.9×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1440 MG/L vs limit 0.0800 MG/L (1.8×)2016-07-01 · Trihalomethanes (TTHM): measured 0.1550 MG/L vs limit 0.0800 MG/L (1.9×)2016-04-01 · Trihalomethanes (TTHM): measured 0.1820 MG/L vs limit 0.0800 MG/L (2.3×)2016-01-01 · Trihalomethanes (TTHM): measured 0.1780 MG/L vs limit 0.0800 MG/L (2.2×)
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

1.9 ppb
1.4 ppb
0.31 ppb

Open now (1)

  1. 2024-08-20E. ColiMonitoring, Source Water (GWR)Open

Every violation on record

  1. 2025-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1870 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-11-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  5. 2024-11-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2024-10-17Lead service line inventoryRPTBack in compliance
  7. 2024-10-17Lead service line inventoryTTBack in compliance
  8. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1770 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2024-08-20E. ColiMonitoring, Source Water (GWR)Open
  10. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1650 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2024-01-01SodiumMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1520 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2023-12-01Revised Total Coliform RuleMONBack in compliance
  15. 2023-10-01Chlorine ×2Monitoring and Reporting (DBP)Back in compliance
  16. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1520 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2023-10-01Revised Total Coliform RuleMONBack in compliance
  18. 2023-07-01Revised Total Coliform RuleMONBack in compliance
  19. 2023-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  20. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1020 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  24. 2022-10-01Revised Total Coliform RuleMONBack in compliance
  25. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
Show the other 42 entries
  1. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1120 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2022-09-01Revised Total Coliform RuleMONBack in compliance
  3. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1550 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1780 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1390 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  10. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1440 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2020-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  12. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1440 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2020-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  14. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1360 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1400 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1760 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1760 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1790 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1750 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1720 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1550 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1420 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1490 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  26. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1440 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  27. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1550 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  28. 2016-05-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  29. 2016-05-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  30. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  31. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1780 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  32. 2015-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  33. 2014-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  34. 2012-10-01Lead and Copper RulePublic EducationBack in compliance
  35. 2010-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  36. 2009-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  37. 1998-06-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  38. 1998-05-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  39. 1987-09-01Coliform (Pre-TCR)MCL, Averagemeasured 80.00 Back in compliance
  40. 1981-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  41. 1979-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  42. 1979-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served350
Service connections232
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityIndiahoma
EPA ZIP on file73552

Areas served

  • Comanche County

Reading this record

Indiahoma Public Works Authority is a community water system that draws from surface water purchased and serves about 350 people in Indiahoma, 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.