Community Water System · PWSID OK1021503

Nowata Municipal Authority

Serves 3,971 peopleSurface WaterOwner: Local GovernmentNowata, Oklahoma
Nothing open right now.

On record since 1984: 86 violations. 26 over the limit · 21 treatment lapses · 31 missed or late tests · 8 notices or reports. Most recent began 2024-10-17.

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

26Over the limit
21Treatment lapse
31Missed or late test
8Notice or report

More violations on record than 82% 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

1984 · Missed or late test: 11985 · Missed or late test: 119851986 · Missed or late test: 11988 · Missed or late test: 11989 · Missed or late test: 319901991 · Over the limit: 119951996 · Over the limit: 12000200520102014 · Treatment lapse: 22014 · Notice or report: 32015 · Over the limit: 12015 · Treatment lapse: 62015 · Treatment lapse: 62015 · Missed or late test: 12015 · Notice or report: 42015 · Notice or report: 420152016 · Over the limit: 32016 · Missed or late test: 92016 · Missed or late test: 92016 · Missed or late test: 92017 · Over the limit: 22017 · Treatment lapse: 122017 · Treatment lapse: 122017 · Treatment lapse: 122017 · Treatment lapse: 122017 · Missed or late test: 122017 · Missed or late test: 122017 · Missed or late test: 122017 · Missed or late test: 122018 · Over the limit: 22019 · Over the limit: 32019 · Missed or late test: 12020 · Over the limit: 120202021 · Over the limit: 12021 · Missed or late test: 12022 · Over the limit: 32023 · Over the limit: 42023 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Treatment lapse: 12024 · Notice or report: 12025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
30% over the limit · 2624% treatment lapse · 2136% missed or late test · 319% notice or report · 8

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)2024-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2023-10-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2023-10-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2023-07-01 · Trihalomethanes (TTHM): measured 0.1060 MG/L vs limit 0.0800 MG/L (1.3×)2023-07-01 · Trihalomethanes (TTHM): measured 0.1090 MG/L vs limit 0.0800 MG/L (1.4×)2022-10-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2022-10-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2022-04-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2019-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2019-01-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2018-10-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2018-07-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2017-10-01 · Trihalomethanes (TTHM): measured 0.0810 MG/L vs limit 0.0800 MG/L (1.0×)2017-04-01 · Trihalomethanes (TTHM): measured 0.0810 MG/L vs limit 0.0800 MG/L (1.0×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2016-04-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2016-01-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2015-10-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)
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

1.2 ppb
0 ppb
0 ppb

Every violation on record

  1. 2024-10-17Lead service line inventoryRPTBack in compliance
  2. 2024-10-17Lead service line inventoryTTBack in compliance
  3. 2024-04-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2023-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2023-07-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.1060 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2022-10-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2021-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  10. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  13. 2019-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  14. 2019-01-01Trihalomethanes (TTHM) ×2MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LBack in compliance
  15. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  16. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LBack in compliance
  17. 2017-12-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2017-12-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  19. 2017-11-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  20. 2017-11-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  21. 2017-10-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2017-10-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  23. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0810 MG/L · limit 0.0800 MG/LBack in compliance
  24. 2017-09-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  25. 2017-09-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
Show the other 55 entries
  1. 2017-08-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  2. 2017-08-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  3. 2017-07-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  4. 2017-07-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  5. 2017-06-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  6. 2017-06-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  7. 2017-05-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  8. 2017-05-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  9. 2017-04-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  10. 2017-04-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  11. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0810 MG/L · limit 0.0800 MG/LBack in compliance
  12. 2017-03-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  13. 2017-03-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  14. 2017-02-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  15. 2017-02-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  16. 2017-01-01Surface water treatment (LT2)Treatment Technique (SWTR and GWR)Back in compliance
  17. 2017-01-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2016-10-01Carbon, TotalMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  19. 2016-08-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  20. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  21. 2016-07-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2016-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  23. 2016-05-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  24. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  25. 2016-04-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  26. 2016-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  27. 2016-03-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  28. 2016-02-01Surface water treatment (LT2)Monitoring of Treatment (SWTR-Filter)Back in compliance
  29. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  30. 2015-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  31. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  32. 2015-08-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  33. 2015-07-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  34. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  35. 2015-06-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  36. 2015-05-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  37. 2015-05-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  38. 2015-04-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  39. 2015-04-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  40. 2015-01-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  41. 2015-01-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  42. 2014-11-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  43. 2014-11-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  44. 2014-10-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  45. 2014-10-01Surface water treatment (LT2)Failure to Filter (SWTR)Back in compliance
  46. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  47. 1996-06-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  48. 1991-02-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  49. 1989-03-01TurbidityMonitoring, RegularBack in compliance
  50. 1989-02-01TurbidityMonitoring, RegularBack in compliance
  51. 1989-01-01TurbidityMonitoring, RegularBack in compliance
  52. 1988-12-01TurbidityMonitoring, RegularBack in compliance
  53. 1986-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  54. 1985-01-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  55. 1984-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served3,971
Service connections2,072
Water sourceSurface Water
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityNowata
EPA ZIP on file74048

Areas served

  • Nowata County

Reading this record

Nowata Municipal Authority is a community water system that draws from surface water and serves about 3,971 people in Nowata, 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.