Community Water System · PWSID OK3005308

Nowata Co Rwd #6

Serves 450 peopleSurface Water PurchasedOwner: Local GovernmentNowata, Oklahoma
Nothing open that measures the water, but 25 open testing or paperwork violations.

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 1980: 87 violations. 24 over the limit · 38 missed or late tests · 25 notices or reports. 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.

24Over the limit
0Treatment lapse
38Missed or late test14 open
25Notice or report11 open

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

1980 · Over the limit: 21980 · Missed or late test: 119801981 · Missed or late test: 81981 · Missed or late test: 81981 · Missed or late test: 81981 · Missed or late test: 81982 · Over the limit: 11982 · Missed or late test: 21984 · Missed or late test: 11985 · Missed or late test: 219851986 · Over the limit: 119901993 · Missed or late test: 119952000200520102012 · Notice or report: 12013 · Notice or report: 12014 · Over the limit: 12014 · Notice or report: 12015 · Over the limit: 32015 · Over the limit: 32015 · Missed or late test: 32015 · Missed or late test: 32015 · Notice or report: 120152016 · Notice or report: 12017 · Notice or report: 12018 · Over the limit: 62018 · Over the limit: 62018 · Over the limit: 62018 · Missed or late test: 32018 · Missed or late test: 32018 · Notice or report: 22019 · Over the limit: 12019 · Missed or late test: 32019 · Missed or late test: 32019 · Notice or report: 22020 · Over the limit: 52020 · Over the limit: 52020 · Over the limit: 52020 · Missed or late test: 62020 · Missed or late test: 62020 · Missed or late test: 62020 · Notice or report: 62020 · Notice or report: 62020 · Notice or report: 620202021 · Over the limit: 12021 · Missed or late test: 12021 · Notice or report: 32021 · Notice or report: 32022 · Over the limit: 12022 · Missed or late test: 12022 · Notice or report: 12023 · Over the limit: 22023 · Missed or late test: 32023 · Missed or late test: 32023 · Notice or report: 42023 · Notice or report: 42024 · Missed or late test: 12024 · Notice or report: 12025 · Missed or late test: 22025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
28% over the limit · 2444% missed or late test · 3829% notice or report · 25

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)Total Haloacetic Acids (HAA5)2023-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2023-01-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2022-10-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0990 MG/L vs limit 0.0800 MG/L (1.2×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1110 MG/L vs limit 0.0800 MG/L (1.4×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1150 MG/L vs limit 0.0800 MG/L (1.4×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1180 MG/L vs limit 0.0800 MG/L (1.5×)2020-01-01 · Total Haloacetic Acids (HAA5): measured 0.0700 MG/L vs limit 0.0600 MG/L (1.2×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0930 MG/L vs limit 0.0800 MG/L (1.2×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1120 MG/L vs limit 0.0800 MG/L (1.4×)2018-07-01 · Total Haloacetic Acids (HAA5): measured 0.0640 MG/L vs limit 0.0600 MG/L (1.1×)2018-04-01 · Total Haloacetic Acids (HAA5): measured 0.0670 MG/L vs limit 0.0600 MG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2018-01-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2015-07-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2015-04-01 · Trihalomethanes (TTHM): measured 0.0840 MG/L vs limit 0.0800 MG/L (1.1×)2015-01-01 · Trihalomethanes (TTHM): measured 0.0890 MG/L vs limit 0.0800 MG/L (1.1×)2014-10-01 · Trihalomethanes (TTHM): measured 0.0830 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 2 results on file · action level 15 ppb

0 ppb
0 ppb

Open now (25)

  1. 2025-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2025-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  3. 2024-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  4. 2023-10-01Public Notice ×2PN Violation for NPDWR ViolationOpen
  5. 2023-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  6. 2023-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  7. 2023-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  8. 2023-03-06Public NoticePN Violation for NPDWR ViolationOpen
  9. 2022-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  10. 2021-12-16Public NoticePN Violation for NPDWR ViolationOpen
  11. 2021-05-05Public NoticePN Violation for NPDWR ViolationOpen
  12. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  13. 2020-12-31Public Notice ×2PN Violation for NPDWR ViolationOpen
  14. 2020-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  15. 2020-06-30Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  16. 2020-06-25Public Notice ×2PN Violation for NPDWR ViolationOpen
  17. 2020-03-31Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  18. 2020-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  19. 2019-12-30Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  20. 2019-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  21. 2018-12-17Public Notice ×2PN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2025-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  3. 2024-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  4. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  5. 2023-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  6. 2023-10-01Public Notice ×2PN Violation for NPDWR ViolationOpen
  7. 2023-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  8. 2023-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  9. 2023-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  10. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2023-03-06Public NoticePN Violation for NPDWR ViolationOpen
  12. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2022-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  14. 2022-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  15. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2021-12-16Public NoticePN Violation for NPDWR ViolationOpen
  17. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  18. 2021-05-05Public NoticePN Violation for NPDWR ViolationOpen
  19. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  20. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  21. 2020-12-31Public Notice ×2PN Violation for NPDWR ViolationOpen
  22. 2020-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  23. 2020-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  24. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0990 MG/L · limit 0.0800 MG/LBack in compliance
  25. 2020-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
Show the other 58 entries
  1. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1110 MG/L · limit 0.0800 MG/LBack in compliance
  2. 2020-06-30Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  3. 2020-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  4. 2020-06-25Public Notice ×2PN Violation for NPDWR ViolationOpen
  5. 2020-04-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1150 MG/L · limit 0.0800 MG/LBack in compliance
  7. 2020-03-31Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  8. 2020-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  9. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1180 MG/L · limit 0.0800 MG/LBack in compliance
  10. 2020-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0700 MG/L · limit 0.0600 MG/LBack in compliance
  11. 2019-12-30Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptOpen
  12. 2019-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptOpen
  13. 2019-12-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  14. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0930 MG/L · limit 0.0800 MG/LBack in compliance
  15. 2019-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  16. 2019-03-17Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2018-12-17Public Notice ×2PN Violation for NPDWR ViolationOpen
  18. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2018-09-29Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  20. 2018-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  21. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1120 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2018-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  23. 2018-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  24. 2018-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0670 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  25. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  26. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  27. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  28. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  29. 2015-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  30. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  31. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  32. 2015-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  33. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0840 MG/L · limit 0.0800 MG/LBack in compliance
  34. 2015-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  35. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0890 MG/L · limit 0.0800 MG/LBack in compliance
  36. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  37. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  38. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  39. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  40. 1993-06-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  41. 1986-06-01Coliform (Pre-TCR)MCL, Averagemeasured 3.00 Back in compliance
  42. 1985-09-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  43. 1985-02-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  44. 1984-07-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  45. 1982-06-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  46. 1982-06-30Coliform (Pre-TCR)MCL, Averagemeasured 5.00 · limit 1.00 Back in compliance
  47. 1982-02-28Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  48. 1981-12-31Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  49. 1981-11-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  50. 1981-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  51. 1981-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  52. 1981-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  53. 1981-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  54. 1981-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  55. 1981-05-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  56. 1980-12-31Coliform (Pre-TCR)MCL, Averagemeasured 21.00 · limit 1.00 Back in compliance
  57. 1980-06-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  58. 1980-06-30Coliform (Pre-TCR)MCL, Averagemeasured 2.00 · limit 1.00 Back in compliance

System details

Population served450
Service connections356
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityNowata
EPA ZIP on file74048

Areas served

  • Nowata County

Reading this record

Nowata Co Rwd #6 is a community water system that draws from surface water purchased and serves about 450 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.