Community Water System · PWSID MT0000364

Winnett Town of

Serves 187 peopleGroundwaterOwner: Local GovernmentWinnett, Montana
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 1997: 82 violations. 73 missed or late tests · 9 notices or reports. Most recent began 2025-10-01.

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
0Treatment lapse
73Missed or late test1 open
9Notice or report

More violations on record than 97% 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

1997 · Missed or late test: 1200020052006 · Notice or report: 12008 · Notice or report: 12010 · Notice or report: 120102011 · Missed or late test: 82011 · Missed or late test: 82012 · Notice or report: 22013 · Missed or late test: 12013 · Notice or report: 12015 · Missed or late test: 120152016 · Missed or late test: 22018 · Notice or report: 12019 · Notice or report: 12020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 552020 · Missed or late test: 5520202023 · Missed or late test: 22024 · Missed or late test: 22024 · Notice or report: 12025 · Missed or late test: 12025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
89% missed or late test · 7311% notice or report · 9

Across Montana, 85% of violations are missed or late tests and 3% 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 1 result on file · action level 15 ppb

7 ppb

Open now (1)

  1. 2025-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen

Every violation on record

  1. 2025-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
  2. 2024-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  3. 2024-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
  4. 2024-01-01ManganeseMonitoring, RegularBack in compliance
  5. 2023-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  6. 2023-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2020-01-01ChlordaneMonitoring, RegularBack in compliance
  8. 2020-01-01PentachlorophenolMonitoring, RegularBack in compliance
  9. 2020-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  10. 2020-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  11. 2020-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  12. 2020-01-012, 4-DMonitoring, RegularBack in compliance
  13. 2020-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  14. 2020-01-01HeptachlorMonitoring, RegularBack in compliance
  15. 2020-01-01LassoMonitoring, RegularBack in compliance
  16. 2020-01-01AtrazineMonitoring, RegularBack in compliance
  17. 2020-01-01CarbofuranMonitoring, RegularBack in compliance
  18. 2020-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  19. 2020-01-01DinosebMonitoring, RegularBack in compliance
  20. 2020-01-01PicloramMonitoring, RegularBack in compliance
  21. 2020-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  22. 2020-01-01SimazineMonitoring, RegularBack in compliance
  23. 2020-01-01OxamylMonitoring, RegularBack in compliance
  24. 2020-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  25. 2020-01-01DalaponMonitoring, RegularBack in compliance
Show the other 56 entries
  1. 2020-01-01ToxapheneMonitoring, RegularBack in compliance
  2. 2020-01-01MethoxychlorMonitoring, RegularBack in compliance
  3. 2020-01-01Bhc-GammaMonitoring, RegularBack in compliance
  4. 2020-01-01EndrinMonitoring, RegularBack in compliance
  5. 2020-01-01StyreneMonitoring, RegularBack in compliance
  6. 2020-01-01EthylbenzeneMonitoring, RegularBack in compliance
  7. 2020-01-01TolueneMonitoring, RegularBack in compliance
  8. 2020-01-01BenzeneMonitoring, RegularBack in compliance
  9. 2020-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  10. 2020-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  11. 2020-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  12. 2020-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  13. 2020-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  14. 2020-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  15. 2020-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  16. 2020-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  17. 2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  18. 2020-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  19. 2020-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  20. 2020-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  21. 2020-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  22. 2020-01-01DichloromethaneMonitoring, RegularBack in compliance
  23. 2020-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  24. 2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  25. 2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  26. 2020-01-01Combined Radium (-226 and -228)Monitoring, RegularBack in compliance
  27. 2020-01-01SeleniumMonitoring, RegularBack in compliance
  28. 2020-01-01Thallium, TotalMonitoring, RegularBack in compliance
  29. 2020-01-01Beryllium, TotalMonitoring, RegularBack in compliance
  30. 2020-01-01Antimony, TotalMonitoring, RegularBack in compliance
  31. 2020-01-01NickelMonitoring, RegularBack in compliance
  32. 2020-01-01MercuryMonitoring, RegularBack in compliance
  33. 2020-01-01FluorideMonitoring, RegularBack in compliance
  34. 2020-01-01ChromiumMonitoring, RegularBack in compliance
  35. 2020-01-01CadmiumMonitoring, RegularBack in compliance
  36. 2020-01-01BariumMonitoring, RegularBack in compliance
  37. 2019-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  38. 2018-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  39. 2016-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  40. 2016-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  41. 2015-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  42. 2013-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  43. 2013-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  44. 2012-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  45. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  46. 2011-10-01E. Coli ×2Monitoring, Source Water (GWR)Back in compliance
  47. 2011-01-01SeleniumMonitoring, RegularBack in compliance
  48. 2011-01-01MercuryMonitoring, RegularBack in compliance
  49. 2011-01-01FluorideMonitoring, RegularBack in compliance
  50. 2011-01-01ChromiumMonitoring, RegularBack in compliance
  51. 2011-01-01CadmiumMonitoring, RegularBack in compliance
  52. 2011-01-01BariumMonitoring, RegularBack in compliance
  53. 2010-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  54. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  55. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  56. 1997-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served187
Service connections138
Water sourceGroundwater
System typeCommunity Water System
OwnerLocal Government
StatusActive
CityWinnett
EPA ZIP on file59087

Areas served

  • Winnett, Petroleum County

Reading this record

Winnett Town of is a community water system that draws from groundwater and serves about 187 people in Winnett, 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.