Community Water System · PWSID OK2002901

Hollis

Serves 2,264 peopleGroundwaterOwner: Local GovernmentHollis, Oklahoma
Nothing open that measures the water, but 1 open testing or paperwork violation.

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 1979: 155 violations. 103 over the limit · 52 missed or late tests. Most recent began 2024-10-01.

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

103Over the limit
0Treatment lapse
52Missed or late test1 open
0Notice or report

More violations on record than 92% 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: 11980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 91980 · Missed or late test: 919801981 · Missed or late test: 41981 · Missed or late test: 41981 · Missed or late test: 41981 · Missed or late test: 41982 · Missed or late test: 61982 · Missed or late test: 61982 · Missed or late test: 61982 · Missed or late test: 61982 · Missed or late test: 61982 · Missed or late test: 61983 · Missed or late test: 61983 · Missed or late test: 61983 · Missed or late test: 61983 · Missed or late test: 61983 · Missed or late test: 61983 · Missed or late test: 61984 · Missed or late test: 71984 · Missed or late test: 71984 · Missed or late test: 71984 · Missed or late test: 71984 · Missed or late test: 71984 · Missed or late test: 71984 · Missed or late test: 71985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 91985 · Missed or late test: 919851986 · Over the limit: 11986 · Missed or late test: 11987 · Missed or late test: 31987 · Missed or late test: 31987 · Missed or late test: 31988 · Missed or late test: 11990 · Missed or late test: 119901991 · Over the limit: 11992 · Over the limit: 11993 · Over the limit: 21993 · Over the limit: 21994 · Over the limit: 41994 · Over the limit: 41994 · Over the limit: 41994 · Over the limit: 41995 · Over the limit: 31995 · Over the limit: 31995 · Over the limit: 319951996 · Over the limit: 51996 · Over the limit: 51996 · Over the limit: 51996 · Over the limit: 51996 · Over the limit: 51997 · Over the limit: 41997 · Over the limit: 41997 · Over the limit: 41997 · Over the limit: 41998 · Over the limit: 51998 · Over the limit: 51998 · Over the limit: 51998 · Over the limit: 51998 · Over the limit: 51999 · Over the limit: 21999 · Over the limit: 22000 · Over the limit: 22000 · Over the limit: 220002001 · Over the limit: 32001 · Over the limit: 32001 · Over the limit: 32002 · Over the limit: 32002 · Over the limit: 32002 · Over the limit: 32003 · Over the limit: 62003 · Over the limit: 62003 · Over the limit: 62003 · Over the limit: 62003 · Over the limit: 62003 · Over the limit: 62004 · Over the limit: 62004 · Over the limit: 62004 · Over the limit: 62004 · Over the limit: 62004 · Over the limit: 62004 · Over the limit: 62005 · Over the limit: 62005 · Over the limit: 62005 · Over the limit: 62005 · Over the limit: 62005 · Over the limit: 62005 · Over the limit: 620052006 · Over the limit: 62006 · Over the limit: 62006 · Over the limit: 62006 · Over the limit: 62006 · Over the limit: 62006 · Over the limit: 62007 · Over the limit: 42007 · Over the limit: 42007 · Over the limit: 42007 · Over the limit: 42008 · Over the limit: 32008 · Over the limit: 32008 · Over the limit: 32009 · Over the limit: 32009 · Over the limit: 32009 · Over the limit: 32010 · Over the limit: 32010 · Over the limit: 32010 · Over the limit: 320102011 · Over the limit: 42011 · Over the limit: 42011 · Over the limit: 42011 · Over the limit: 42012 · Over the limit: 42012 · Over the limit: 42012 · Over the limit: 42012 · Over the limit: 42013 · Over the limit: 32013 · Over the limit: 32013 · Over the limit: 32014 · Over the limit: 32014 · Over the limit: 32014 · Over the limit: 32015 · Over the limit: 32015 · Over the limit: 32015 · Over the limit: 320152016 · Over the limit: 32016 · Over the limit: 32016 · Over the limit: 32016 · Missed or late test: 12017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42017 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42018 · Over the limit: 42020 · Over the limit: 120202022 · Missed or late test: 22022 · Missed or late test: 22024 · Over the limit: 12024 · Missed or late test: 12025
One square = one violation, by the year it began. Empty columns are years with nothing on EPA's record.
66% over the limit · 10334% missed or late test · 52

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×+Nitrate-NitriteNitrate2024-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2020-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2018-10-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2018-07-01 · Nitrate-Nitrite: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2018-04-01 · Nitrate-Nitrite: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2018-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2017-10-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2017-07-01 · Nitrate-Nitrite: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2017-04-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2017-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2016-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2016-04-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2016-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2015-10-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2015-07-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2015-04-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2014-10-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2014-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2014-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2013-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2013-04-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2013-01-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2012-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2012-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2012-01-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2012-01-01 · Nitrate-Nitrite: measured 11.40 MG/L vs limit 10.00 MG/L (1.1×)2011-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2011-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2011-04-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2011-01-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2010-10-01 · Nitrate-Nitrite: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2010-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2010-04-01 · Nitrate-Nitrite: measured 12.30 MG/L vs limit 10.00 MG/L (1.2×)2009-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2009-04-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2009-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2008-10-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2008-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2008-01-01 · Nitrate-Nitrite: measured 24.40 MG/L vs limit 10.00 MG/L (2.4×)2007-10-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2007-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2007-04-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2007-01-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2006-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2006-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2006-04-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2006-04-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2006-01-01 · Nitrate-Nitrite: measured 11.00 MG/L vs limit 10.00 MG/L (1.1×)2006-01-01 · Nitrate-Nitrite: measured 11.30 MG/L vs limit 10.00 MG/L (1.1×)2005-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2005-10-01 · Nitrate-Nitrite: measured 11.70 MG/L vs limit 10.00 MG/L (1.2×)2005-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2005-07-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2005-04-01 · Nitrate-Nitrite: measured 12.00 vs limit 10.00 (1.2×)2005-01-01 · Nitrate-Nitrite: measured 12.00 vs limit 10.00 (1.2×)2004-10-01 · Nitrate-Nitrite: measured 13.00 vs limit 10.00 (1.3×)2004-04-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2004-01-01 · Nitrate-Nitrite: measured 14.00 MG/L vs limit 10.00 MG/L (1.4×)2003-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2003-04-01 · Nitrate: measured 11.70 vs limit 10.00 (1.2×)2003-01-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2001-10-01 · Nitrate: measured 14.50 vs limit 10.00 (1.4×)2001-07-01 · Nitrate: measured 13.00 vs limit 10.00 (1.3×)2001-01-01 · Nitrate: measured 13.30 vs limit 10.00 (1.3×)1999-01-01 · Nitrate: measured 13.30 vs limit 10.00 (1.3×)1998-10-01 · Nitrate: measured 13.75 vs limit 10.00 (1.4×)1998-07-01 · Nitrate: measured 11.96 vs limit 10.00 (1.2×)1998-04-01 · Nitrate: measured 12.40 vs limit 10.00 (1.2×)1998-01-01 · Nitrate: measured 12.14 vs limit 10.00 (1.2×)1997-10-01 · Nitrate: measured 12.48 vs limit 10.00 (1.2×)1997-07-01 · Nitrate: measured 11.55 vs limit 10.00 (1.2×)1997-04-01 · Nitrate: measured 11.75 vs limit 10.00 (1.2×)1997-01-01 · Nitrate: measured 12.99 vs limit 10.00 (1.3×)1996-10-01 · Nitrate: measured 12.78 vs limit 10.00 (1.3×)1996-07-01 · Nitrate: measured 11.38 vs limit 10.00 (1.1×)1996-06-30 · Nitrate: measured 10.98 vs limit 10.00 (1.1×)1996-04-01 · Nitrate: measured 12.82 vs limit 10.00 (1.3×)1996-01-01 · Nitrate: measured 12.84 vs limit 10.00 (1.3×)1995-10-01 · Nitrate: measured 13.16 vs limit 10.00 (1.3×)1995-04-01 · Nitrate: measured 12.43 vs limit 10.00 (1.2×)1995-01-01 · Nitrate: measured 12.92 vs limit 10.00 (1.3×)1994-10-01 · Nitrate: measured 13.93 vs limit 10.00 (1.4×)1994-07-01 · Nitrate: measured 11.00 vs limit 10.00 (1.1×)1994-01-01 · Nitrate: measured 13.00 vs limit 10.00 (1.3×)1993-11-08 · Nitrate: measured 11.00 vs limit 10.00 (1.1×)1993-08-19 · Nitrate: measured 11.70 vs limit 10.00 (1.2×)
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 4 results on file · action level 15 ppb

5.1 ppb
2.6 ppb
0 ppb
0 ppb

Open now (1)

  1. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen

Every violation on record

  1. 2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2024-07-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  3. 2022-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  4. 2022-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  5. 2020-07-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  6. 2018-10-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  7. 2018-07-01Nitrate-NitriteMCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LBack in compliance
  8. 2018-04-01Nitrate-NitriteMCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LBack in compliance
  9. 2018-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  10. 2017-10-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  11. 2017-07-01Nitrate-NitriteMCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LBack in compliance
  12. 2017-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  13. 2017-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  14. 2016-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  15. 2016-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  16. 2016-01-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  17. 2016-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  18. 2015-10-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  19. 2015-07-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  20. 2015-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  21. 2014-10-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  22. 2014-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  23. 2014-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  24. 2013-07-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  25. 2013-04-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
Show the other 122 entries
  1. 2013-01-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  2. 2012-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  3. 2012-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  4. 2012-01-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  5. 2011-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  6. 2011-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  7. 2011-04-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  8. 2011-01-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  9. 2010-10-01Nitrate-NitriteMCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LBack in compliance
  10. 2010-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  11. 2010-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.30 MG/L · limit 10.00 MG/LBack in compliance
  12. 2009-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  13. 2009-04-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  14. 2009-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  15. 2008-10-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  16. 2008-07-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  17. 2008-01-01Nitrate-NitriteMCL, Single Samplemeasured 24.40 MG/L · limit 10.00 MG/LBack in compliance
  18. 2007-10-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  19. 2007-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  20. 2007-04-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  21. 2007-01-01Nitrate-NitriteMCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  22. 2006-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  23. 2006-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  24. 2006-04-01Nitrate-NitriteMCL, Averagemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  25. 2006-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  26. 2006-01-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 11.00 MG/L · limit 10.00 MG/LBack in compliance
  27. 2005-10-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  28. 2005-07-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  29. 2005-04-01Nitrate-NitriteMCL, Averagemeasured 12.00 · limit 10.00 Back in compliance
  30. 2005-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 · limit 10.00 Back in compliance
  31. 2004-10-01Nitrate-NitriteMCL, Averagemeasured 13.00 · limit 10.00 Back in compliance
  32. 2004-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.60 Back in compliance
  33. 2004-04-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  34. 2004-01-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 14.00 MG/L · limit 10.00 MG/LBack in compliance
  35. 2003-10-01Nitrate-NitriteMCL, Averagemeasured 11.70 Back in compliance
  36. 2003-07-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LBack in compliance
  37. 2003-04-01NitrateMCL, Averagemeasured 11.70 · limit 10.00 Back in compliance
  38. 2003-01-01Nitrate-Nitrite ×2MCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LBack in compliance
  39. 2002-10-01NitrateMCL, Averagemeasured 12.15 Back in compliance
  40. 2002-07-01NitrateMCL, Averagemeasured 12.55 Back in compliance
  41. 2002-01-01NitrateMCL, Averagemeasured 13.40 Back in compliance
  42. 2001-10-01NitrateMCL, Averagemeasured 14.50 · limit 10.00 Back in compliance
  43. 2001-07-01NitrateMCL, Averagemeasured 13.00 · limit 10.00 Back in compliance
  44. 2001-01-01NitrateMCL, Averagemeasured 13.30 · limit 10.00 Back in compliance
  45. 2000-10-01NitrateMCL, Averagemeasured 12.00 Back in compliance
  46. 2000-07-01NitrateMCL, Averagemeasured 12.95 Back in compliance
  47. 1999-10-01NitrateMCL, Averagemeasured 11.90 Back in compliance
  48. 1999-01-01NitrateMCL, Averagemeasured 13.30 · limit 10.00 Back in compliance
  49. 1998-10-01NitrateMCL, Averagemeasured 13.75 · limit 10.00 Back in compliance
  50. 1998-07-01NitrateMCL, Averagemeasured 11.96 · limit 10.00 Back in compliance
  51. 1998-05-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  52. 1998-04-01NitrateMCL, Averagemeasured 12.40 · limit 10.00 Back in compliance
  53. 1998-01-01NitrateMCL, Averagemeasured 12.14 · limit 10.00 Back in compliance
  54. 1997-10-01NitrateMCL, Averagemeasured 12.48 · limit 10.00 Back in compliance
  55. 1997-07-01NitrateMCL, Averagemeasured 11.55 · limit 10.00 Back in compliance
  56. 1997-04-01NitrateMCL, Averagemeasured 11.75 · limit 10.00 Back in compliance
  57. 1997-01-01NitrateMCL, Averagemeasured 12.99 · limit 10.00 Back in compliance
  58. 1996-10-01NitrateMCL, Averagemeasured 12.78 · limit 10.00 Back in compliance
  59. 1996-07-01NitrateMCL, Averagemeasured 11.38 · limit 10.00 Back in compliance
  60. 1996-06-30NitrateMCL, Averagemeasured 10.98 · limit 10.00 Back in compliance
  61. 1996-04-01NitrateMCL, Averagemeasured 12.82 · limit 10.00 Back in compliance
  62. 1996-01-01NitrateMCL, Averagemeasured 12.84 · limit 10.00 Back in compliance
  63. 1995-10-01NitrateMCL, Averagemeasured 13.16 · limit 10.00 Back in compliance
  64. 1995-04-01NitrateMCL, Averagemeasured 12.43 · limit 10.00 Back in compliance
  65. 1995-01-01NitrateMCL, Averagemeasured 12.92 · limit 10.00 Back in compliance
  66. 1994-10-01NitrateMCL, Averagemeasured 13.93 · limit 10.00 Back in compliance
  67. 1994-07-01NitrateMCL, Averagemeasured 11.00 · limit 10.00 Back in compliance
  68. 1994-04-01NitrateMCL, Averagemeasured 11.40 Back in compliance
  69. 1994-01-01NitrateMCL, Averagemeasured 13.00 · limit 10.00 Back in compliance
  70. 1993-11-08NitrateMCL, Averagemeasured 11.00 · limit 10.00 Back in compliance
  71. 1993-08-19NitrateMCL, Averagemeasured 11.70 · limit 10.00 Back in compliance
  72. 1992-11-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  73. 1991-08-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  74. 1990-03-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  75. 1988-07-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  76. 1987-12-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  77. 1987-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  78. 1987-02-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  79. 1986-09-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  80. 1986-01-01Coliform (Pre-TCR)MCL, Averagemeasured 3.00 Back in compliance
  81. 1985-11-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  82. 1985-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  83. 1985-09-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  84. 1985-08-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  85. 1985-07-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  86. 1985-06-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  87. 1985-05-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  88. 1985-02-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  89. 1985-01-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  90. 1984-09-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  91. 1984-07-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  92. 1984-06-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  93. 1984-05-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  94. 1984-03-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  95. 1984-02-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  96. 1984-01-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  97. 1983-12-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  98. 1983-11-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  99. 1983-10-01Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  100. 1983-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  101. 1983-05-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  102. 1983-01-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  103. 1982-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  104. 1982-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  105. 1982-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  106. 1982-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  107. 1982-04-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  108. 1982-02-28Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  109. 1981-11-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  110. 1981-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  111. 1981-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  112. 1981-01-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  113. 1980-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  114. 1980-11-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  115. 1980-10-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  116. 1980-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  117. 1980-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  118. 1980-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  119. 1980-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  120. 1980-05-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  121. 1980-02-29Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  122. 1979-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served2,264
Service connections957
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityHollis
EPA ZIP on file73550

Areas served

  • Harmon County

Reading this record

Hollis is a community water system that draws from groundwater and serves about 2,264 people in Hollis, 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.