Community Water System · PWSID TX0940085

Oak Hills Ranch Water

Serves 624 peopleGroundwaterOwner: PrivateDes Peres, Missouri
Nothing open right now.

On record since 2004: 156 violations. 1 treatment lapse · 101 missed or late tests · 54 notices or reports. Most recent began 2025-04-01.

None of them is a measurement of contaminated water.

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

0Over the limit
1Treatment lapse
101Missed or late test
54Notice or report

More violations on record than 99% of active water systems in Missouri. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2004 · Notice or report: 12005 · Notice or report: 120052006 · Notice or report: 12007 · Notice or report: 22008 · Notice or report: 12009 · Notice or report: 22010 · Missed or late test: 22010 · Notice or report: 220102012 · Missed or late test: 12012 · Notice or report: 12013 · Missed or late test: 52013 · Missed or late test: 52013 · Notice or report: 22014 · Missed or late test: 12014 · Notice or report: 72014 · Notice or report: 72014 · Notice or report: 72015 · Missed or late test: 12015 · Notice or report: 120152016 · Notice or report: 22017 · Missed or late test: 42017 · Missed or late test: 42017 · Notice or report: 12018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Missed or late test: 222018 · Notice or report: 22019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Missed or late test: 282019 · Notice or report: 22020 · Treatment lapse: 12020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Missed or late test: 282020 · Notice or report: 62020 · Notice or report: 620202021 · Notice or report: 112021 · Notice or report: 112021 · Notice or report: 112021 · Notice or report: 112022 · Notice or report: 72022 · Notice or report: 72022 · Notice or report: 72023 · Missed or late test: 32024 · Missed or late test: 42024 · Missed or late test: 42024 · Notice or report: 22025 · Missed or late test: 22025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
<1% treatment lapse · 165% missed or late test · 10135% notice or report · 54

Across Missouri, 54% of violations are missed or late tests and 8% 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 4 results on file · action level 15 ppb

15 ppb
7.6 ppb
4.1 ppb
2.5 ppb

Every violation on record

  1. 2025-04-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  2. 2025-01-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  3. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  4. 2024-08-18Public NoticePN Violation for NPDWR ViolationBack in compliance
  5. 2024-07-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  6. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  7. 2024-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  8. 2024-01-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  9. 2023-07-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  10. 2023-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  11. 2023-01-01Lead and Copper RuleWater Quality Parameter M/RPeriod ended · no return to compliance on file
  12. 2022-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  13. 2022-04-03Public NoticePN Violation for NPDWR ViolationBack in compliance
  14. 2022-04-02Public Notice ×5PN Violation for NPDWR ViolationBack in compliance
  15. 2021-12-23Public NoticePN Violation for NPDWR ViolationBack in compliance
  16. 2021-12-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  17. 2021-10-02Public NoticePN Violation for NPDWR ViolationBack in compliance
  18. 2021-07-22Public NoticePN Violation for NPDWR ViolationBack in compliance
  19. 2021-07-04Public NoticePN Violation for NPDWR ViolationBack in compliance
  20. 2021-04-18Public Notice ×3PN Violation for NPDWR ViolationBack in compliance
  21. 2021-03-15Public NoticePN Violation for NPDWR ViolationBack in compliance
  22. 2021-02-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  23. 2021-01-16Public NoticePN Violation for NPDWR ViolationBack in compliance
  24. 2020-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  25. 2020-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
Show the other 124 entries
  1. 2020-09-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  2. 2020-07-02Revised Total Coliform RuleTTBack in compliance
  3. 2020-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  4. 2020-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  5. 2020-05-31Public NoticePN Violation for NPDWR ViolationBack in compliance
  6. 2020-05-12E. ColiMonitoring, Source Water (GWR)Back in compliance
  7. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  8. 2020-03-23Public NoticePN Violation for NPDWR ViolationBack in compliance
  9. 2020-01-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  10. 2020-01-09Public NoticePN Violation for NPDWR ViolationBack in compliance
  11. 2020-01-01StyreneMonitoring, RegularBack in compliance
  12. 2020-01-01EthylbenzeneMonitoring, RegularBack in compliance
  13. 2020-01-01TolueneMonitoring, RegularBack in compliance
  14. 2020-01-01BenzeneMonitoring, RegularBack in compliance
  15. 2020-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  16. 2020-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  17. 2020-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  18. 2020-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  19. 2020-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  20. 2020-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  21. 2020-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  22. 2020-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  23. 2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  24. 2020-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  25. 2020-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  26. 2020-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  27. 2020-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  28. 2020-01-01DichloromethaneMonitoring, RegularBack in compliance
  29. 2020-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  30. 2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  31. 2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  32. 2020-01-01NitrateMonitoring, RegularBack in compliance
  33. 2020-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  34. 2019-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  35. 2019-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  36. 2019-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  37. 2019-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  38. 2019-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  39. 2019-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  40. 2019-01-04Public NoticePN Violation for NPDWR ViolationBack in compliance
  41. 2019-01-01StyreneMonitoring, RegularBack in compliance
  42. 2019-01-01EthylbenzeneMonitoring, RegularBack in compliance
  43. 2019-01-01TolueneMonitoring, RegularBack in compliance
  44. 2019-01-01BenzeneMonitoring, RegularBack in compliance
  45. 2019-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  46. 2019-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  47. 2019-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  48. 2019-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  49. 2019-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  50. 2019-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  51. 2019-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  52. 2019-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  53. 2019-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  54. 2019-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  55. 2019-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  56. 2019-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  57. 2019-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  58. 2019-01-01DichloromethaneMonitoring, RegularBack in compliance
  59. 2019-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  60. 2019-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  61. 2019-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  62. 2019-01-01NitriteMonitoring, RegularBack in compliance
  63. 2019-01-01NitrateMonitoring, RegularBack in compliance
  64. 2018-10-25Public NoticePN Violation for NPDWR ViolationBack in compliance
  65. 2018-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  66. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  67. 2018-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  68. 2018-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  69. 2018-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  70. 2018-01-01ChlordaneMonitoring, RegularBack in compliance
  71. 2018-01-01PentachlorophenolMonitoring, RegularBack in compliance
  72. 2018-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  73. 2018-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  74. 2018-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  75. 2018-01-01HeptachlorMonitoring, RegularBack in compliance
  76. 2018-01-01LassoMonitoring, RegularBack in compliance
  77. 2018-01-01AtrazineMonitoring, RegularBack in compliance
  78. 2018-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  79. 2018-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  80. 2018-01-01SimazineMonitoring, RegularBack in compliance
  81. 2018-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  82. 2018-01-01ToxapheneMonitoring, RegularBack in compliance
  83. 2018-01-01MethoxychlorMonitoring, RegularBack in compliance
  84. 2018-01-01Bhc-GammaMonitoring, RegularBack in compliance
  85. 2018-01-01EndrinMonitoring, RegularBack in compliance
  86. 2018-01-01CyanideMonitoring, RegularBack in compliance
  87. 2018-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  88. 2017-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  89. 2017-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  90. 2017-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  91. 2017-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  92. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  93. 2016-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  94. 2016-01-08Public NoticePN Violation for NPDWR ViolationBack in compliance
  95. 2015-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  96. 2015-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  97. 2014-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  98. 2014-08-19Public NoticePN Violation for NPDWR ViolationBack in compliance
  99. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  100. 2014-05-13Public NoticePN Violation for NPDWR ViolationBack in compliance
  101. 2014-04-12Public NoticePN Violation for NPDWR ViolationBack in compliance
  102. 2014-02-24Public NoticePN Violation for NPDWR ViolationBack in compliance
  103. 2014-02-13Public Notice ×2PN Violation for NPDWR ViolationBack in compliance
  104. 2013-12-01Public NoticePN Violation for NPDWR ViolationBack in compliance
  105. 2013-12-01E. ColiMonitoring, Source Water (GWR)Back in compliance
  106. 2013-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  107. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  108. 2013-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
  109. 2013-01-01Combined UraniumMonitoring, RegularBack in compliance
  110. 2013-01-01Gross Alpha, Excl. Radon and UMonitoring, RegularBack in compliance
  111. 2012-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  112. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  113. 2010-07-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  114. 2010-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  115. 2010-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  116. 2010-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  117. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  118. 2009-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  119. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  120. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  121. 2007-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  122. 2006-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  123. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  124. 2004-01-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance

System details

Population served624
Service connections208
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityDes Peres
EPA ZIP on file63131-1871

Areas served

  • Guadalupe County

Reading this record

Oak Hills Ranch Water is a community water system that draws from groundwater and serves about 624 people in Des Peres, Missouri. 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.