Community Water System · PWSID OK3006701

Seminole Co. Rwd #2

Serves 315 peopleSurface Water PurchasedOwner: Local GovernmentWewoka, Oklahoma
1 open treatment violation.

Open for: Lead service line inventory. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 1979: 63 violations. 43 over the limit · 1 treatment lapse · 16 missed or late tests · 3 notices or reports. Most recent began 2025-06-30.

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

43Over the limit
1Treatment lapse1 open
16Missed or late test
3Notice or report1 open

More violations on record than 74% 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: 119801981 · Missed or late test: 11982 · Over the limit: 11982 · Missed or late test: 21982 · Missed or late test: 219851986 · Over the limit: 1199019952000200520102012 · Notice or report: 12014 · Notice or report: 120152016 · Over the limit: 72016 · Over the limit: 72016 · Over the limit: 72016 · Over the limit: 72016 · Over the limit: 72016 · Over the limit: 72016 · Over the limit: 72017 · 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 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
68% over the limit · 432% treatment lapse · 125% missed or late test · 165% notice or report · 3

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)2025-04-01 · Trihalomethanes (TTHM): measured 0.0960 MG/L vs limit 0.0800 MG/L (1.2×)2025-01-01 · Trihalomethanes (TTHM): measured 0.1140 MG/L vs limit 0.0800 MG/L (1.4×)2024-10-01 · Trihalomethanes (TTHM): measured 0.1160 MG/L vs limit 0.0800 MG/L (1.4×)2024-07-01 · Trihalomethanes (TTHM): measured 0.1160 MG/L vs limit 0.0800 MG/L (1.4×)2024-04-01 · Trihalomethanes (TTHM): measured 0.1210 MG/L vs limit 0.0800 MG/L (1.5×)2024-01-01 · Trihalomethanes (TTHM): measured 0.1000 MG/L vs limit 0.0800 MG/L (1.2×)2023-10-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2023-07-01 · Trihalomethanes (TTHM): measured 0.1190 MG/L vs limit 0.0800 MG/L (1.5×)2023-04-01 · Trihalomethanes (TTHM): measured 0.1270 MG/L vs limit 0.0800 MG/L (1.6×)2023-01-01 · Trihalomethanes (TTHM): measured 0.1350 MG/L vs limit 0.0800 MG/L (1.7×)2022-10-01 · Trihalomethanes (TTHM): measured 0.1190 MG/L vs limit 0.0800 MG/L (1.5×)2022-07-01 · Trihalomethanes (TTHM): measured 0.1310 MG/L vs limit 0.0800 MG/L (1.6×)2022-04-01 · Trihalomethanes (TTHM): measured 0.1330 MG/L vs limit 0.0800 MG/L (1.7×)2022-01-01 · Trihalomethanes (TTHM): measured 0.1500 MG/L vs limit 0.0800 MG/L (1.9×)2021-10-01 · Trihalomethanes (TTHM): measured 0.1470 MG/L vs limit 0.0800 MG/L (1.8×)2021-07-01 · Trihalomethanes (TTHM): measured 0.1370 MG/L vs limit 0.0800 MG/L (1.7×)2021-04-01 · Trihalomethanes (TTHM): measured 0.1370 MG/L vs limit 0.0800 MG/L (1.7×)2021-01-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)2020-10-01 · Trihalomethanes (TTHM): measured 0.1520 MG/L vs limit 0.0800 MG/L (1.9×)2020-07-01 · Trihalomethanes (TTHM): measured 0.1560 MG/L vs limit 0.0800 MG/L (1.9×)2020-04-01 · Trihalomethanes (TTHM): measured 0.1570 MG/L vs limit 0.0800 MG/L (2.0×)2020-01-01 · Trihalomethanes (TTHM): measured 0.1490 MG/L vs limit 0.0800 MG/L (1.9×)2019-10-01 · Trihalomethanes (TTHM): measured 0.1510 MG/L vs limit 0.0800 MG/L (1.9×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1460 MG/L vs limit 0.0800 MG/L (1.8×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)2019-01-01 · Trihalomethanes (TTHM): measured 0.1360 MG/L vs limit 0.0800 MG/L (1.7×)2018-10-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2018-07-01 · Trihalomethanes (TTHM): measured 0.1370 MG/L vs limit 0.0800 MG/L (1.7×)2018-04-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2018-01-01 · Trihalomethanes (TTHM): measured 0.1350 MG/L vs limit 0.0800 MG/L (1.7×)2017-10-01 · Trihalomethanes (TTHM): measured 0.1250 MG/L vs limit 0.0800 MG/L (1.6×)2017-07-01 · Trihalomethanes (TTHM): measured 0.1220 MG/L vs limit 0.0800 MG/L (1.5×)2017-04-01 · Trihalomethanes (TTHM): measured 0.1500 MG/L vs limit 0.0800 MG/L (1.9×)2017-01-01 · Trihalomethanes (TTHM): measured 0.1670 MG/L vs limit 0.0800 MG/L (2.1×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1610 MG/L vs limit 0.0800 MG/L (2.0×)2016-07-01 · Trihalomethanes (TTHM): measured 0.1750 MG/L vs limit 0.0800 MG/L (2.2×)2016-07-01 · Total Haloacetic Acids (HAA5): measured 0.0770 MG/L vs limit 0.0600 MG/L (1.3×)2016-04-01 · Trihalomethanes (TTHM): measured 0.1740 MG/L vs limit 0.0800 MG/L (2.2×)2016-04-01 · Total Haloacetic Acids (HAA5): measured 0.1150 MG/L vs limit 0.0600 MG/L (1.9×)2016-01-01 · Trihalomethanes (TTHM): measured 0.2090 MG/L vs limit 0.0800 MG/L (2.6×)2016-01-01 · Total Haloacetic Acids (HAA5): measured 0.1330 MG/L vs limit 0.0600 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 7 results on file · action level 15 ppb

4.9 ppb
2.3 ppb
2.2 ppb
1.2 ppb
0.88 ppb
0.33 ppb
0 ppb

Open now (2)

  1. 2024-10-17Lead service line inventoryRPTOpen
  2. 2024-10-17Lead service line inventoryTTOpen

Every violation on record

  1. 2025-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  2. 2025-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0960 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2025-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1140 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  4. 2024-10-17Lead service line inventoryRPTOpen
  5. 2024-10-17Lead service line inventoryTTOpen
  6. 2024-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1160 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2024-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  8. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1160 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1210 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1000 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1230 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2023-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  13. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1190 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1270 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1350 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  16. 2022-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  17. 2022-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1190 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2022-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  19. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1310 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1330 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  21. 2022-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  22. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1500 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2021-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  24. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1470 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2021-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
Show the other 38 entries
  1. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1370 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1370 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2021-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  4. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  5. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1520 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2020-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1560 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  7. 2020-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1570 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2020-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1490 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1510 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  10. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1460 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1360 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  13. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1370 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2018-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  16. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  17. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1350 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2017-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  19. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1250 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2017-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  21. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1220 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  22. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1500 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1670 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  24. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1610 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  25. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1750 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  26. 2016-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0770 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  27. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1740 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  28. 2016-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1150 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  29. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2090 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  30. 2016-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1330 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  31. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  32. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  33. 1986-08-01Coliform (Pre-TCR)MCL, Averagemeasured 19.00 Back in compliance
  34. 1982-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  35. 1982-06-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  36. 1982-06-30Coliform (Pre-TCR)MCL, Averagemeasured 4.00 · limit 1.00 Back in compliance
  37. 1981-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  38. 1979-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served315
Service connections149
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 #2 is a community water system that draws from surface water purchased and serves about 315 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.