Community Water System · PWSID OK3006702

Seminole Co. Rwd #1

Serves 387 peopleSurface Water PurchasedOwner: Local GovernmentWewoka, Oklahoma
Nothing open right now.

On record since 1980: 67 violations. 40 over the limit · 1 treatment lapse · 22 missed or late tests · 4 notices or reports. 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.

40Over the limit
1Treatment lapse
22Missed or late test
4Notice or report

More violations on record than 76% 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 · Missed or late test: 21980 · Missed or late test: 219801981 · Missed or late test: 41981 · Missed or late test: 41981 · Missed or late test: 41981 · Missed or late test: 41982 · Over the limit: 11982 · Missed or late test: 21982 · Missed or late test: 21983 · Missed or late test: 31983 · Missed or late test: 31983 · Missed or late test: 319851986 · Over the limit: 1199019952000200520102012 · Notice or report: 12014 · Notice or report: 12015 · Notice or report: 120152016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42016 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Missed or late test: 22017 · Missed or late test: 22018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Missed or late test: 12019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42019 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 42020 · Over the limit: 420202021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Over the limit: 42021 · Missed or late test: 32021 · Missed or late test: 32021 · Missed or late test: 32022 · 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: 12024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Over the limit: 42024 · Treatment lapse: 12024 · Missed or late test: 12024 · Notice or report: 12025 · Over the limit: 22025 · Over the limit: 22025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
60% over the limit · 401% treatment lapse · 133% missed or late test · 226% notice or report · 4

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)2025-04-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2025-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2024-10-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2024-07-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2023-07-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0940 MG/L vs limit 0.0800 MG/L (1.2×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2022-10-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2022-07-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1080 MG/L vs limit 0.0800 MG/L (1.3×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1050 MG/L vs limit 0.0800 MG/L (1.3×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2021-04-01 · Trihalomethanes (TTHM): measured 0.0980 MG/L vs limit 0.0800 MG/L (1.2×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2020-07-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1300 MG/L vs limit 0.0800 MG/L (1.6×)2019-10-01 · Trihalomethanes (TTHM): measured 0.1320 MG/L vs limit 0.0800 MG/L (1.7×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1390 MG/L vs limit 0.0800 MG/L (1.7×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1390 MG/L vs limit 0.0800 MG/L (1.7×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1330 MG/L vs limit 0.0800 MG/L (1.7×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1430 MG/L vs limit 0.0800 MG/L (1.8×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1490 MG/L vs limit 0.0800 MG/L (1.9×)2018-04-01 · Trihalomethanes (TTHM): measured 0.1640 MG/L vs limit 0.0800 MG/L (2.0×)2018-01-01 · Trihalomethanes (TTHM): measured 0.1780 MG/L vs limit 0.0800 MG/L (2.2×)2017-10-01 · Trihalomethanes (TTHM): measured 0.1510 MG/L vs limit 0.0800 MG/L (1.9×)2017-07-01 · Trihalomethanes (TTHM): measured 0.1600 MG/L vs limit 0.0800 MG/L (2.0×)2017-04-01 · Trihalomethanes (TTHM): measured 0.1630 MG/L vs limit 0.0800 MG/L (2.0×)2017-01-01 · Trihalomethanes (TTHM): measured 0.1890 MG/L vs limit 0.0800 MG/L (2.4×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1720 MG/L vs limit 0.0800 MG/L (2.1×)2016-07-01 · Trihalomethanes (TTHM): measured 0.1630 MG/L vs limit 0.0800 MG/L (2.0×)2016-04-01 · Trihalomethanes (TTHM): measured 0.1650 MG/L vs limit 0.0800 MG/L (2.1×)2016-01-01 · Trihalomethanes (TTHM): measured 0.1570 MG/L vs limit 0.0800 MG/L (2.0×)
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 3 results on file · action level 15 ppb

0.71 ppb
0.48 ppb
0.26 ppb

Every violation on record

  1. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2024-10-17Lead service line inventoryRPTBack in compliance
  4. 2024-10-17Lead service line inventoryTTBack in compliance
  5. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2024-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  7. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2023-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  12. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0940 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2022-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  16. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2022-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  18. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2022-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  21. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1080 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2021-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  23. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1050 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2021-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  25. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
Show the other 42 entries
  1. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0980 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  3. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1300 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1320 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1390 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1390 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1330 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1430 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1490 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2018-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  15. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1640 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1780 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2017-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  18. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1510 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  19. 2017-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  20. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1600 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1630 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1890 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1720 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1630 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1650 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  26. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1570 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  27. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  28. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  29. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  30. 1986-07-01Coliform (Pre-TCR)MCL, Averagemeasured 14.00 Back in compliance
  31. 1983-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  32. 1983-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  33. 1983-04-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  34. 1982-06-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  35. 1982-06-30Coliform (Pre-TCR)MCL, Averagemeasured 27.00 · limit 1.00 Back in compliance
  36. 1982-05-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  37. 1981-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  38. 1981-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  39. 1981-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  40. 1981-05-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  41. 1980-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  42. 1980-04-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served387
Service connections119
Water sourceSurface Water Purchased
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWewoka
EPA ZIP on file74884

Areas served

  • Seminole County

Reading this record

Seminole Co. Rwd #1 is a community water system that draws from surface water purchased and serves about 387 people in Wewoka, 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.