Community Water System · PWSID OK1021222

Otoe-Missouria Tribe

Serves 250 peopleSurface WaterOwner: Native AmericanRed Rock, Oklahoma
Nothing open right now.

On record since 1997: 146 violations. 82 over the limit · 32 treatment lapses · 28 missed or late tests · 4 notices or reports. Most recent began 2023-01-01.

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

82Over the limit
32Treatment lapse
28Missed or late test
4Notice or report

More violations on record than 91% 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

1997 · Missed or late test: 120002004 · Over the limit: 32004 · Over the limit: 32005 · Over the limit: 42005 · Over the limit: 420052006 · Over the limit: 52006 · Over the limit: 52006 · Over the limit: 52007 · Over the limit: 42007 · Over the limit: 42008 · Over the limit: 42008 · Over the limit: 42008 · Missed or late test: 22009 · Over the limit: 42009 · Over the limit: 42009 · Treatment lapse: 12010 · Over the limit: 42010 · Over the limit: 42010 · Treatment lapse: 12010 · Missed or late test: 32010 · Missed or late test: 320102011 · Over the limit: 42011 · Over the limit: 42011 · Missed or late test: 12012 · Over the limit: 42012 · Over the limit: 42013 · Over the limit: 32013 · Over the limit: 32013 · Treatment lapse: 42013 · Treatment lapse: 42013 · Notice or report: 12014 · Over the limit: 22014 · Treatment lapse: 32014 · Treatment lapse: 32014 · Notice or report: 12015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Over the limit: 72015 · Treatment lapse: 42015 · Treatment lapse: 42015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Missed or late test: 72015 · Notice or report: 120152016 · Over the limit: 42016 · Over the limit: 42016 · Treatment lapse: 72016 · Treatment lapse: 72016 · Treatment lapse: 72016 · Treatment lapse: 72016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Missed or late test: 122016 · Notice or report: 12017 · Over the limit: 72017 · Over the limit: 72017 · Over the limit: 72017 · Over the limit: 72017 · Treatment lapse: 42017 · Treatment lapse: 42018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Over the limit: 82018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Treatment lapse: 72018 · Missed or late test: 22019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Over the limit: 72019 · Treatment lapse: 12020 · Over the limit: 120202021 · Over the limit: 42021 · Over the limit: 42022 · Over the limit: 22023 · Over the limit: 12025
One square ≈ 2 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
56% over the limit · 8222% treatment lapse · 3219% missed or late test · 283% 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)Total Haloacetic Acids (HAA5)2023-01-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2022-07-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2022-01-01 · Trihalomethanes (TTHM): measured 0.0850 MG/L vs limit 0.0800 MG/L (1.1×)2021-10-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-07-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2021-04-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-01-01 · Trihalomethanes (TTHM): measured 0.0910 MG/L vs limit 0.0800 MG/L (1.1×)2020-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0810 MG/L vs limit 0.0800 MG/L (1.0×)2019-07-01 · Trihalomethanes (TTHM): measured 0.1420 MG/L vs limit 0.0800 MG/L (1.8×)2019-07-01 · Total Haloacetic Acids (HAA5): measured 0.1300 MG/L vs limit 0.0600 MG/L (2.2×)2019-04-01 · Trihalomethanes (TTHM): measured 0.1820 MG/L vs limit 0.0800 MG/L (2.3×)2019-04-01 · Total Haloacetic Acids (HAA5): measured 0.1370 MG/L vs limit 0.0600 MG/L (2.3×)2019-01-01 · Trihalomethanes (TTHM): measured 0.2110 MG/L vs limit 0.0800 MG/L (2.6×)2019-01-01 · Total Haloacetic Acids (HAA5): measured 0.1470 MG/L vs limit 0.0600 MG/L (2.4×)2018-10-01 · Trihalomethanes (TTHM): measured 0.2430 MG/L vs limit 0.0800 MG/L (3.0×)2018-10-01 · Total Haloacetic Acids (HAA5): measured 0.1600 MG/L vs limit 0.0600 MG/L (2.7×)2018-07-01 · Trihalomethanes (TTHM): measured 0.2170 MG/L vs limit 0.0800 MG/L (2.7×)2018-07-01 · Total Haloacetic Acids (HAA5): measured 0.0840 MG/L vs limit 0.0600 MG/L (1.4×)2018-04-01 · Total Haloacetic Acids (HAA5): measured 0.0710 MG/L vs limit 0.0600 MG/L (1.2×)2018-04-01 · Trihalomethanes (TTHM): measured 0.2070 MG/L vs limit 0.0800 MG/L (2.6×)2018-01-01 · Total Haloacetic Acids (HAA5): measured 0.0890 MG/L vs limit 0.0600 MG/L (1.5×)2018-01-01 · Trihalomethanes (TTHM): measured 0.2300 MG/L vs limit 0.0800 MG/L (2.9×)2017-10-01 · Total Haloacetic Acids (HAA5): measured 0.0860 MG/L vs limit 0.0600 MG/L (1.4×)2017-10-01 · Trihalomethanes (TTHM): measured 0.2110 MG/L vs limit 0.0800 MG/L (2.6×)2017-07-01 · Total Haloacetic Acids (HAA5): measured 0.0650 MG/L vs limit 0.0600 MG/L (1.1×)2017-07-01 · Trihalomethanes (TTHM): measured 0.2260 MG/L vs limit 0.0800 MG/L (2.8×)2017-04-01 · Total Haloacetic Acids (HAA5): measured 0.0620 MG/L vs limit 0.0600 MG/L (1.0×)2017-04-01 · Trihalomethanes (TTHM): measured 0.1930 MG/L vs limit 0.0800 MG/L (2.4×)2017-01-01 · Trihalomethanes (TTHM): measured 0.1810 MG/L vs limit 0.0800 MG/L (2.3×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1770 MG/L vs limit 0.0800 MG/L (2.2×)2016-07-01 · Trihalomethanes (TTHM): measured 0.1410 MG/L vs limit 0.0800 MG/L (1.8×)2016-04-01 · Trihalomethanes (TTHM): measured 0.1830 MG/L vs limit 0.0800 MG/L (2.3×)2016-01-01 · Trihalomethanes (TTHM): measured 0.1740 MG/L vs limit 0.0800 MG/L (2.2×)2015-10-01 · Trihalomethanes (TTHM): measured 0.1900 MG/L vs limit 0.0800 MG/L (2.4×)2015-07-01 · Trihalomethanes (TTHM): measured 0.2120 MG/L vs limit 0.0800 MG/L (2.6×)2015-07-01 · Total Haloacetic Acids (HAA5): measured 0.0620 MG/L vs limit 0.0600 MG/L (1.0×)2015-04-01 · Trihalomethanes (TTHM): measured 0.2060 MG/L vs limit 0.0800 MG/L (2.6×)2015-04-01 · Total Haloacetic Acids (HAA5): measured 0.0740 MG/L vs limit 0.0600 MG/L (1.2×)2015-01-01 · Trihalomethanes (TTHM): measured 0.2120 MG/L vs limit 0.0800 MG/L (2.6×)2015-01-01 · Total Haloacetic Acids (HAA5): measured 0.0640 MG/L vs limit 0.0600 MG/L (1.1×)2014-10-01 · Trihalomethanes (TTHM): measured 0.1990 MG/L vs limit 0.0800 MG/L (2.5×)2014-07-01 · Trihalomethanes (TTHM): measured 0.1910 MG/L vs limit 0.0800 MG/L (2.4×)2013-07-01 · Trihalomethanes (TTHM): measured 0.1720 MG/L vs limit 0.0800 MG/L (2.1×)2013-04-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2013-01-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2012-10-01 · Trihalomethanes (TTHM): measured 0.1230 MG/L vs limit 0.0800 MG/L (1.5×)2012-07-01 · Trihalomethanes (TTHM): measured 0.1290 MG/L vs limit 0.0800 MG/L (1.6×)2012-04-01 · Trihalomethanes (TTHM): measured 0.1590 MG/L vs limit 0.0800 MG/L (2.0×)2012-01-01 · Trihalomethanes (TTHM): measured 0.1500 MG/L vs limit 0.0800 MG/L (1.9×)2011-10-01 · Trihalomethanes (TTHM): measured 0.1510 MG/L vs limit 0.0800 MG/L (1.9×)2011-07-01 · Trihalomethanes (TTHM): measured 0.1470 MG/L vs limit 0.0800 MG/L (1.8×)2011-04-01 · Trihalomethanes (TTHM): measured 0.1520 MG/L vs limit 0.0800 MG/L (1.9×)2011-01-01 · Trihalomethanes (TTHM): measured 0.1690 MG/L vs limit 0.0800 MG/L (2.1×)2010-10-01 · Trihalomethanes (TTHM): measured 0.1610 MG/L vs limit 0.0800 MG/L (2.0×)2010-07-01 · Trihalomethanes (TTHM): measured 0.1560 MG/L vs limit 0.0800 MG/L (1.9×)2010-04-01 · Trihalomethanes (TTHM): measured 0.1610 MG/L vs limit 0.0800 MG/L (2.0×)2010-01-01 · Trihalomethanes (TTHM): measured 0.1330 MG/L vs limit 0.0800 MG/L (1.7×)2009-10-01 · Trihalomethanes (TTHM): measured 0.1310 MG/L vs limit 0.0800 MG/L (1.6×)2009-07-01 · Trihalomethanes (TTHM): measured 0.1240 MG/L vs limit 0.0800 MG/L (1.6×)2009-04-01 · Trihalomethanes (TTHM): measured 0.1290 MG/L vs limit 0.0800 MG/L (1.6×)2009-01-01 · Trihalomethanes (TTHM): measured 0.1450 MG/L vs limit 0.0800 MG/L (1.8×)2008-10-01 · Trihalomethanes (TTHM): measured 0.1590 MG/L vs limit 0.0800 MG/L (2.0×)2008-07-01 · Trihalomethanes (TTHM): measured 0.1650 MG/L vs limit 0.0800 MG/L (2.1×)2008-04-01 · Trihalomethanes (TTHM): measured 0.1570 MG/L vs limit 0.0800 MG/L (2.0×)2008-01-01 · Trihalomethanes (TTHM): measured 0.1600 MG/L vs limit 0.0800 MG/L (2.0×)2007-10-01 · Trihalomethanes (TTHM): measured 0.1590 MG/L vs limit 0.0800 MG/L (2.0×)2007-07-01 · Trihalomethanes (TTHM): measured 0.1600 MG/L vs limit 0.0800 MG/L (2.0×)2007-04-01 · Trihalomethanes (TTHM): measured 0.1470 MG/L vs limit 0.0800 MG/L (1.8×)2007-01-01 · Trihalomethanes (TTHM): measured 0.1310 MG/L vs limit 0.0800 MG/L (1.6×)2006-07-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2006-07-01 · Total Haloacetic Acids (HAA5): measured 0.0630 MG/L vs limit 0.0600 MG/L (1.1×)2006-04-01 · Trihalomethanes (TTHM): measured 0.1340 MG/L vs limit 0.0800 MG/L (1.7×)2006-04-01 · Total Haloacetic Acids (HAA5): measured 0.0640 MG/L vs limit 0.0600 MG/L (1.1×)2006-01-01 · Trihalomethanes (TTHM): measured 0.1220 MG/L vs limit 0.0800 MG/L (1.5×)2005-10-01 · Total Haloacetic Acids (HAA5): measured 0.0650 vs limit 0.0600 (1.1×)2005-10-01 · Trihalomethanes (TTHM): measured 0.1280 vs limit 0.0800 (1.6×)2005-04-01 · Trihalomethanes (TTHM): measured 0.1060 vs limit 0.0800 (1.3×)2005-01-01 · Trihalomethanes (TTHM): measured 0.1400 vs limit 0.0800 (1.8×)
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 5 results on file · action level 15 ppb

12.5 ppb
3.3 ppb
1.3 ppb
0 ppb
0 ppb

Every violation on record

  1. 2023-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LBack in compliance
  2. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  3. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0850 MG/L · limit 0.0800 MG/LBack in compliance
  4. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LBack in compliance
  6. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  7. 2021-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0910 MG/L · limit 0.0800 MG/LBack in compliance
  8. 2020-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  9. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0810 MG/L · limit 0.0800 MG/LBack in compliance
  10. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1420 MG/L · limit 0.0800 MG/LBack in compliance
  11. 2019-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1300 MG/L · limit 0.0600 MG/LBack in compliance
  12. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1820 MG/L · limit 0.0800 MG/LBack in compliance
  13. 2019-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1370 MG/L · limit 0.0600 MG/LBack in compliance
  14. 2019-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  15. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2110 MG/L · limit 0.0800 MG/LBack in compliance
  16. 2019-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1470 MG/L · limit 0.0600 MG/LBack in compliance
  17. 2018-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  18. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2430 MG/L · limit 0.0800 MG/LBack in compliance
  19. 2018-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.1600 MG/L · limit 0.0600 MG/LBack in compliance
  20. 2018-08-01Surface water treatment (SWTR)Treatment Technique (SWTR and GWR)Back in compliance
  21. 2018-08-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  22. 2018-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  23. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2170 MG/L · limit 0.0800 MG/LBack in compliance
  24. 2018-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0840 MG/L · limit 0.0600 MG/LBack in compliance
  25. 2018-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
Show the other 121 entries
  1. 2018-04-01Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  2. 2018-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  3. 2018-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0710 MG/L · limit 0.0600 MG/LBack in compliance
  4. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2070 MG/L · limit 0.0800 MG/LBack in compliance
  5. 2018-02-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  6. 2018-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  7. 2018-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0890 MG/L · limit 0.0600 MG/LBack in compliance
  8. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2300 MG/L · limit 0.0800 MG/LBack in compliance
  9. 2017-10-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  10. 2017-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0860 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  11. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2110 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  12. 2017-07-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  13. 2017-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0650 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  14. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2260 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  15. 2017-04-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  16. 2017-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0620 MG/L · limit 0.0600 MG/LPeriod ended · no return to compliance on file
  17. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1930 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  18. 2017-01-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  19. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1810 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  20. 2016-10-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  21. 2016-10-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  22. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1770 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  23. 2016-09-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  24. 2016-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  25. 2016-09-01Surface water filtration (IESWTR)Single Turbidity Exceed (Enhanced SWTR)Back in compliance
  26. 2016-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  27. 2016-07-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  28. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1410 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  29. 2016-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  30. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  31. 2016-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  32. 2016-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  33. 2016-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  34. 2016-04-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  35. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  36. 2016-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  37. 2016-03-31Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  38. 2016-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  39. 2016-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  40. 2016-01-01Carbon, TotalTreatment Technique Precursor RemovalPeriod ended · no return to compliance on file
  41. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1740 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  42. 2016-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
  43. 2016-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  44. 2015-12-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  45. 2015-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  46. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1900 MG/L · limit 0.0800 MG/LBack in compliance
  47. 2015-09-29Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  48. 2015-09-29Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  49. 2015-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  50. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2120 MG/L · limit 0.0800 MG/LBack in compliance
  51. 2015-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0620 MG/L · limit 0.0600 MG/LBack in compliance
  52. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  53. 2015-06-30Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  54. 2015-06-30Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  55. 2015-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  56. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2060 MG/L · limit 0.0800 MG/LBack in compliance
  57. 2015-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0740 MG/L · limit 0.0600 MG/LBack in compliance
  58. 2015-04-01Total Haloacetic Acids (HAA5)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  59. 2015-04-01Trihalomethanes (TTHM)Failure Submit IDSE/Subpart V Plan RptBack in compliance
  60. 2015-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  61. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.2120 MG/L · limit 0.0800 MG/LBack in compliance
  62. 2015-01-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/L · limit 0.0600 MG/LBack in compliance
  63. 2014-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  64. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1990 MG/L · limit 0.0800 MG/LBack in compliance
  65. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  66. 2014-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1910 MG/L · limit 0.0800 MG/LBack in compliance
  67. 2014-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  68. 2014-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  69. 2013-10-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  70. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  71. 2013-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1720 MG/L · limit 0.0800 MG/LBack in compliance
  72. 2013-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  73. 2013-04-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  74. 2013-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LBack in compliance
  75. 2013-01-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  76. 2013-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LBack in compliance
  77. 2012-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1230 MG/L · limit 0.0800 MG/LBack in compliance
  78. 2012-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1290 MG/L · limit 0.0800 MG/LBack in compliance
  79. 2012-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1590 MG/L · limit 0.0800 MG/LBack in compliance
  80. 2012-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1500 MG/L · limit 0.0800 MG/LBack in compliance
  81. 2011-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1510 MG/L · limit 0.0800 MG/LBack in compliance
  82. 2011-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  83. 2011-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1470 MG/L · limit 0.0800 MG/LBack in compliance
  84. 2011-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1520 MG/L · limit 0.0800 MG/LBack in compliance
  85. 2011-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1690 MG/L · limit 0.0800 MG/LBack in compliance
  86. 2010-10-01Dbp Stage 2Failure Submit IDSE/Subpart V Plan RptBack in compliance
  87. 2010-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1610 MG/L · limit 0.0800 MG/LBack in compliance
  88. 2010-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1560 MG/L · limit 0.0800 MG/LBack in compliance
  89. 2010-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  90. 2010-04-02Surface water treatment (LT2)Failure Submit Treatment Requirement RptBack in compliance
  91. 2010-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1610 MG/L · limit 0.0800 MG/LBack in compliance
  92. 2010-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1330 MG/L · limit 0.0800 MG/LBack in compliance
  93. 2010-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  94. 2009-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1310 MG/L · limit 0.0800 MG/LBack in compliance
  95. 2009-07-01Carbon, TotalTreatment Technique Precursor RemovalBack in compliance
  96. 2009-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1240 MG/L · limit 0.0800 MG/LBack in compliance
  97. 2009-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1290 MG/L · limit 0.0800 MG/LBack in compliance
  98. 2009-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1450 MG/L · limit 0.0800 MG/LBack in compliance
  99. 2008-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1590 MG/L · limit 0.0800 MG/LBack in compliance
  100. 2008-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1650 MG/L · limit 0.0800 MG/LBack in compliance
  101. 2008-04-02Surface water treatment (LT2)Monitoring, Source Water (LT2)Back in compliance
  102. 2008-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1570 MG/L · limit 0.0800 MG/LBack in compliance
  103. 2008-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  104. 2008-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1600 MG/L · limit 0.0800 MG/LBack in compliance
  105. 2007-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1590 MG/L · limit 0.0800 MG/LBack in compliance
  106. 2007-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1600 MG/L · limit 0.0800 MG/LBack in compliance
  107. 2007-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1470 MG/L · limit 0.0800 MG/LBack in compliance
  108. 2007-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1310 MG/L · limit 0.0800 MG/LBack in compliance
  109. 2006-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LBack in compliance
  110. 2006-07-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0630 MG/L · limit 0.0600 MG/LBack in compliance
  111. 2006-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1340 MG/L · limit 0.0800 MG/LBack in compliance
  112. 2006-04-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0640 MG/L · limit 0.0600 MG/LBack in compliance
  113. 2006-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1220 MG/L · limit 0.0800 MG/LBack in compliance
  114. 2005-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 0.0650 · limit 0.0600 Back in compliance
  115. 2005-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1280 · limit 0.0800 Back in compliance
  116. 2005-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1060 · limit 0.0800 Back in compliance
  117. 2005-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1400 · limit 0.0800 Back in compliance
  118. 2004-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 151.82 Back in compliance
  119. 2004-10-01Total Haloacetic Acids (HAA5)MCL, Averagemeasured 61.99 Back in compliance
  120. 2004-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 100.06 Back in compliance
  121. 1997-08-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance

System details

Population served250
Service connections92
Water sourceSurface Water
System typeCommunity Water System
OwnerNative American
StatusActive
CityRed Rock
EPA ZIP on file74651

Areas served

  • Noble County

Reading this record

Otoe-Missouria Tribe is a community water system that draws from surface water and serves about 250 people in Red Rock, 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.