Community Water System · PWSID MT0000018

St Labre Indian School

Serves 650 peopleGroundwaterOwner: PrivateAshland, MontanaServes a school or daycare
Nothing open right now.

On record since 2005: 128 violations. 27 over the limit · 16 treatment lapses · 72 missed or late tests · 13 notices or reports. Most recent began 2025-10-01.

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

27Over the limit
16Treatment lapse
72Missed or late test
13Notice or report

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

The record, year by year

2005 · Notice or report: 120052009 · Missed or late test: 12009 · Notice or report: 12010 · Notice or report: 220102011 · Missed or late test: 12011 · Notice or report: 22012 · Notice or report: 22013 · Missed or late test: 12013 · Notice or report: 22014 · Missed or late test: 22015 · Over the limit: 420152016 · Treatment lapse: 32016 · Missed or late test: 32017 · Over the limit: 32017 · Treatment lapse: 32017 · Missed or late test: 22017 · Notice or report: 12018 · Over the limit: 42018 · Treatment lapse: 22018 · Missed or late test: 22019 · Over the limit: 32019 · Treatment lapse: 82019 · Treatment lapse: 82020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Missed or late test: 542020 · Notice or report: 120202021 · Over the limit: 32021 · Missed or late test: 12022 · Over the limit: 32023 · Over the limit: 32023 · Missed or late test: 22023 · Notice or report: 12024 · Over the limit: 32024 · Missed or late test: 12025 · Over the limit: 12025 · Missed or late test: 22025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
21% over the limit · 2713% treatment lapse · 1656% missed or late test · 7210% notice or report · 13

Across Montana, 85% of violations are missed or late tests and 3% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2025-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2024-07-01 · Trihalomethanes (TTHM): measured 83.00 UG/L vs limit 80.00 UG/L (1.0×)2024-04-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2024-01-01 · Trihalomethanes (TTHM): measured 0.0920 MG/L vs limit 0.0800 MG/L (1.1×)2023-10-01 · Trihalomethanes (TTHM): measured 0.0860 MG/L vs limit 0.0800 MG/L (1.1×)2023-07-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2023-04-01 · Trihalomethanes (TTHM): measured 0.0820 MG/L vs limit 0.0800 MG/L (1.0×)2022-07-01 · Trihalomethanes (TTHM): measured 0.0870 MG/L vs limit 0.0800 MG/L (1.1×)2022-04-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2022-01-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2021-10-01 · Trihalomethanes (TTHM): measured 90.00 UG/L vs limit 80.00 UG/L (1.1×)2021-07-01 · Trihalomethanes (TTHM): measured 88.00 UG/L vs limit 80.00 UG/L (1.1×)2021-04-01 · Trihalomethanes (TTHM): measured 84.30 UG/L vs limit 80.00 UG/L (1.1×)2019-07-01 · Trihalomethanes (TTHM): measured 104.50 UG/L vs limit 80.00 UG/L (1.3×)2019-04-01 · Trihalomethanes (TTHM): measured 110.00 UG/L vs limit 80.00 UG/L (1.4×)2019-01-01 · Trihalomethanes (TTHM): measured 106.50 UG/L vs limit 80.00 UG/L (1.3×)2018-10-01 · Trihalomethanes (TTHM): measured 117.80 UG/L vs limit 80.00 UG/L (1.5×)2018-07-01 · Trihalomethanes (TTHM): measured 92.00 UG/L vs limit 80.00 UG/L (1.1×)2018-04-01 · Trihalomethanes (TTHM): measured 84.00 UG/L vs limit 80.00 UG/L (1.1×)2018-01-01 · Trihalomethanes (TTHM): measured 82.30 UG/L vs limit 80.00 UG/L (1.0×)2017-10-01 · Trihalomethanes (TTHM): measured 93.00 UG/L vs limit 80.00 UG/L (1.2×)2017-07-01 · Trihalomethanes (TTHM): measured 101.50 UG/L vs limit 80.00 UG/L (1.3×)2017-04-01 · Trihalomethanes (TTHM): measured 82.80 UG/L vs limit 80.00 UG/L (1.0×)2015-10-01 · Trihalomethanes (TTHM): measured 83.80 UG/L vs limit 80.00 UG/L (1.0×)2015-07-01 · Trihalomethanes (TTHM): measured 89.50 UG/L vs limit 80.00 UG/L (1.1×)2015-04-01 · Trihalomethanes (TTHM): measured 89.50 UG/L vs limit 80.00 UG/L (1.1×)2015-01-01 · Trihalomethanes (TTHM): measured 0.0915 MG/L vs limit 0.0800 MG/L (1.1×)
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

10 ppb
3 ppb
2 ppb
1 ppb
0 ppb

Every violation on record

  1. 2025-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  2. 2025-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  3. 2025-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  4. 2024-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 83.00 UG/L · limit 80.00 UG/LPeriod ended · no return to compliance on file
  5. 2024-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  6. 2024-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
  7. 2024-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0920 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  8. 2023-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0860 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  9. 2023-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  10. 2023-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  11. 2023-04-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  12. 2023-04-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  13. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0820 MG/L · limit 0.0800 MG/LPeriod ended · no return to compliance on file
  14. 2022-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0870 MG/L · limit 0.0800 MG/LBack in compliance
  15. 2022-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LBack in compliance
  16. 2022-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  17. 2021-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 90.00 UG/L · limit 80.00 UG/LBack in compliance
  18. 2021-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  19. 2021-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 88.00 UG/L · limit 80.00 UG/LBack in compliance
  20. 2021-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.30 UG/L · limit 80.00 UG/LBack in compliance
  21. 2020-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  22. 2020-01-01StyreneMonitoring, RegularBack in compliance
  23. 2020-01-01EthylbenzeneMonitoring, RegularBack in compliance
  24. 2020-01-01TolueneMonitoring, RegularBack in compliance
  25. 2020-01-01BenzeneMonitoring, RegularBack in compliance
Show the other 103 entries
  1. 2020-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  2. 2020-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  3. 2020-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  4. 2020-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  5. 2020-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  6. 2020-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  7. 2020-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  8. 2020-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  9. 2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  10. 2020-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  11. 2020-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  12. 2020-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  13. 2020-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  14. 2020-01-01DichloromethaneMonitoring, RegularBack in compliance
  15. 2020-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  16. 2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  17. 2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  18. 2020-01-01ChlordaneMonitoring, RegularBack in compliance
  19. 2020-01-01PentachlorophenolMonitoring, RegularBack in compliance
  20. 2020-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  21. 2020-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  22. 2020-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  23. 2020-01-012, 4-DMonitoring, RegularBack in compliance
  24. 2020-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  25. 2020-01-01HeptachlorMonitoring, RegularBack in compliance
  26. 2020-01-01LassoMonitoring, RegularBack in compliance
  27. 2020-01-01AtrazineMonitoring, RegularBack in compliance
  28. 2020-01-01CarbofuranMonitoring, RegularBack in compliance
  29. 2020-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  30. 2020-01-01DinosebMonitoring, RegularBack in compliance
  31. 2020-01-01PicloramMonitoring, RegularBack in compliance
  32. 2020-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  33. 2020-01-01SimazineMonitoring, RegularBack in compliance
  34. 2020-01-01OxamylMonitoring, RegularBack in compliance
  35. 2020-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  36. 2020-01-01DalaponMonitoring, RegularBack in compliance
  37. 2020-01-01ToxapheneMonitoring, RegularBack in compliance
  38. 2020-01-01MethoxychlorMonitoring, RegularBack in compliance
  39. 2020-01-01Bhc-GammaMonitoring, RegularBack in compliance
  40. 2020-01-01EndrinMonitoring, RegularBack in compliance
  41. 2020-01-01SeleniumMonitoring, RegularBack in compliance
  42. 2020-01-01Thallium, TotalMonitoring, RegularBack in compliance
  43. 2020-01-01Beryllium, TotalMonitoring, RegularBack in compliance
  44. 2020-01-01Antimony, TotalMonitoring, RegularBack in compliance
  45. 2020-01-01NickelMonitoring, RegularBack in compliance
  46. 2020-01-01MercuryMonitoring, RegularBack in compliance
  47. 2020-01-01FluorideMonitoring, RegularBack in compliance
  48. 2020-01-01ChromiumMonitoring, RegularBack in compliance
  49. 2020-01-01CadmiumMonitoring, RegularBack in compliance
  50. 2020-01-01BariumMonitoring, RegularBack in compliance
  51. 2019-12-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  52. 2019-10-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  53. 2019-07-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  54. 2019-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 104.50 UG/L · limit 80.00 UG/LBack in compliance
  55. 2019-06-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  56. 2019-04-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  57. 2019-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 110.00 UG/L · limit 80.00 UG/LBack in compliance
  58. 2019-03-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  59. 2019-02-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  60. 2019-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 106.50 UG/L · limit 80.00 UG/LBack in compliance
  61. 2019-01-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  62. 2018-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 117.80 UG/L · limit 80.00 UG/LBack in compliance
  63. 2018-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  64. 2018-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 92.00 UG/L · limit 80.00 UG/LBack in compliance
  65. 2018-05-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  66. 2018-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 84.00 UG/L · limit 80.00 UG/LBack in compliance
  67. 2018-02-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  68. 2018-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.30 UG/L · limit 80.00 UG/LBack in compliance
  69. 2018-01-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  70. 2017-11-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  71. 2017-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 93.00 UG/L · limit 80.00 UG/LBack in compliance
  72. 2017-09-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  73. 2017-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 101.50 UG/L · limit 80.00 UG/LBack in compliance
  74. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  75. 2017-06-01Revised Total Coliform RuleMONBack in compliance
  76. 2017-06-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  77. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 82.80 UG/L · limit 80.00 UG/LBack in compliance
  78. 2017-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
  79. 2016-10-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  80. 2016-09-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  81. 2016-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  82. 2016-06-01Groundwater RuleMonitoring of Treatment (SWTR-Unfilt/GWR)Back in compliance
  83. 2016-05-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  84. 2016-03-01Groundwater RuleTreatment Technique (SWTR and GWR)Back in compliance
  85. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 83.80 UG/L · limit 80.00 UG/LBack in compliance
  86. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 89.50 UG/L · limit 80.00 UG/LBack in compliance
  87. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 89.50 UG/L · limit 80.00 UG/LBack in compliance
  88. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0915 MG/L · limit 0.0800 MG/LBack in compliance
  89. 2014-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  90. 2014-01-01FluorideMonitoring, RegularBack in compliance
  91. 2013-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  92. 2013-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  93. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  94. 2012-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  95. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  96. 2011-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  97. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  98. 2011-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  99. 2010-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  100. 2010-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  101. 2009-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  102. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  103. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served650
Service connections98
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityAshland
EPA ZIP on file59003

Areas served

  • Ashland, Rosebud County

Reading this record

St Labre Indian School is a community water system that draws from groundwater and serves about 650 people in Ashland, Montana. 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.