Community Water System · PWSID OK2005535

Willow Creek MHP

Serves 99 peopleGroundwaterOwner: PrivateHarrah, Oklahoma
Nothing open right now.

On record since 1980: 142 violations. 7 over the limit · 2 treatment lapses · 129 missed or late tests · 4 notices or reports. Most recent began 2025-01-01.

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

7Over the limit
2Treatment lapse
129Missed 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

1980 · Missed or late test: 61980 · Missed or late test: 619801981 · Over the limit: 11981 · Missed or late test: 11982 · Over the limit: 11982 · Missed or late test: 119851988 · Over the limit: 21990 · Over the limit: 119901991 · Over the limit: 11991 · Missed or late test: 11992 · Over the limit: 11992 · Missed or late test: 21993 · Missed or late test: 31994 · Missed or late test: 21995 · Missed or late test: 11995200020052009 · Missed or late test: 120102011 · Treatment lapse: 12011 · Missed or late test: 212011 · Missed or late test: 212011 · Missed or late test: 212011 · Missed or late test: 212011 · Missed or late test: 212012 · Notice or report: 12013 · Notice or report: 12014 · Notice or report: 12015 · Missed or late test: 120152018 · Missed or late test: 120202023 · Missed or late test: 12024 · Treatment lapse: 12024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Missed or late test: 582024 · Notice or report: 12025 · Missed or late test: 292025 · Missed or late test: 292025 · Missed or late test: 292025 · Missed or late test: 292025 · Missed or late test: 292025 · Missed or late test: 292025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
5% over the limit · 71% treatment lapse · 291% missed or late test · 1293% notice or report · 4

Across Oklahoma, 73% of violations are missed or late tests and 19% are water over a limit.

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

0.5 ppb
0 ppb
0 ppb

Every violation on record

  1. 2025-01-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2025-01-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-01-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2025-01-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2025-01-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2025-01-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2025-01-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2025-01-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2025-01-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2025-01-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2025-01-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2025-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2025-01-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2025-01-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2025-01-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2025-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2025-01-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2025-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2025-01-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2025-01-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2025-01-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2025-01-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2025-01-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 117 entries
  1. 2025-01-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2025-01-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-01-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-01-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2024-10-17Lead service line inventoryRPTBack in compliance
  6. 2024-10-17Lead service line inventoryTTBack in compliance
  7. 2024-10-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2024-10-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2024-10-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2024-10-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  11. 2024-10-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2024-10-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2024-10-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2024-10-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2024-10-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2024-10-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2024-10-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2024-10-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2024-10-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2024-10-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2024-10-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-10-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2024-10-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2024-10-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-10-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2024-10-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2024-10-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2024-10-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2024-10-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2024-10-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2024-10-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2024-10-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2024-10-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2024-10-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2024-10-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  36. 2024-07-01ChlordaneMonitoring, RegularBack in compliance
  37. 2024-07-01Ethylene DibromideMonitoring, RegularBack in compliance
  38. 2024-07-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
  39. 2024-07-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  40. 2024-07-01PentachlorophenolMonitoring, RegularBack in compliance
  41. 2024-07-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  42. 2024-07-01HexachlorobenzeneMonitoring, RegularBack in compliance
  43. 2024-07-012, 4, 5-TpMonitoring, RegularBack in compliance
  44. 2024-07-012, 4-DMonitoring, RegularBack in compliance
  45. 2024-07-01Heptachlor epoxideMonitoring, RegularBack in compliance
  46. 2024-07-01HeptachlorMonitoring, RegularBack in compliance
  47. 2024-07-01LassoMonitoring, RegularBack in compliance
  48. 2024-07-01AtrazineMonitoring, RegularBack in compliance
  49. 2024-07-01CarbofuranMonitoring, RegularBack in compliance
  50. 2024-07-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  51. 2024-07-01DinosebMonitoring, RegularBack in compliance
  52. 2024-07-01PicloramMonitoring, RegularBack in compliance
  53. 2024-07-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  54. 2024-07-01SimazineMonitoring, RegularBack in compliance
  55. 2024-07-01OxamylMonitoring, RegularBack in compliance
  56. 2024-07-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  57. 2024-07-01GlyphosateMonitoring, RegularBack in compliance
  58. 2024-07-01EndothallMonitoring, RegularBack in compliance
  59. 2024-07-01DiquatMonitoring, RegularBack in compliance
  60. 2024-07-01DalaponMonitoring, RegularBack in compliance
  61. 2024-07-01ToxapheneMonitoring, RegularBack in compliance
  62. 2024-07-01MethoxychlorMonitoring, RegularBack in compliance
  63. 2024-07-01Bhc-GammaMonitoring, RegularBack in compliance
  64. 2024-07-01EndrinMonitoring, RegularBack in compliance
  65. 2023-07-26E. ColiMonitoring, Source Water (GWR)Back in compliance
  66. 2018-11-22E. ColiMonitoring, Source Water (GWR)Back in compliance
  67. 2015-05-30E. ColiMonitoring, Source Water (GWR)Back in compliance
  68. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  69. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  70. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  71. 2011-04-11Lead and Copper RulePublic EducationBack in compliance
  72. 2011-01-01StyreneMonitoring, RegularBack in compliance
  73. 2011-01-01EthylbenzeneMonitoring, RegularBack in compliance
  74. 2011-01-01TolueneMonitoring, RegularBack in compliance
  75. 2011-01-01BenzeneMonitoring, RegularBack in compliance
  76. 2011-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  77. 2011-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  78. 2011-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  79. 2011-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  80. 2011-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  81. 2011-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  82. 2011-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  83. 2011-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  84. 2011-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  85. 2011-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  86. 2011-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  87. 2011-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  88. 2011-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  89. 2011-01-01DichloromethaneMonitoring, RegularBack in compliance
  90. 2011-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  91. 2011-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  92. 2011-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  93. 2009-10-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  94. 1995-07-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  95. 1994-10-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  96. 1994-09-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  97. 1993-08-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  98. 1993-06-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  99. 1993-02-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  100. 1992-05-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  101. 1992-02-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  102. 1992-01-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  103. 1991-12-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  104. 1991-10-01Coliform (TCR)Monitoring, Routine Major (TCR)Back in compliance
  105. 1990-04-01Coliform (Pre-TCR)MCL, Averagemeasured 9.00 Back in compliance
  106. 1988-11-01Coliform (Pre-TCR)MCL, Averagemeasured 3.00 Back in compliance
  107. 1988-07-01Coliform (Pre-TCR)MCL, Averagemeasured 8.00 Back in compliance
  108. 1982-09-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  109. 1982-09-30Coliform (Pre-TCR)MCL, Averagemeasured 2.00 · limit 1.00 Back in compliance
  110. 1981-11-30Coliform (Pre-TCR)Monitoring, Check/Repeat/ConfirmationBack in compliance
  111. 1981-11-30Coliform (Pre-TCR)MCL, Averagemeasured 2.00 · limit 1.00 Back in compliance
  112. 1980-12-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  113. 1980-09-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  114. 1980-08-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  115. 1980-07-31Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  116. 1980-06-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance
  117. 1980-04-30Coliform (Pre-TCR)Monitoring, RegularBack in compliance

System details

Population served99
Service connections50
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityHarrah
EPA ZIP on file73045

Areas served

  • Oklahoma County

Reading this record

Willow Creek MHP is a community water system that draws from groundwater and serves about 99 people in Harrah, 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.