Community Water System · PWSID MT0000432

King Ranch Colony

Serves 56 peopleGroundwaterOwner: PrivateLewistown, 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 2012: 88 violations. 25 over the limit · 56 missed or late tests · 7 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.

25Over the limit
0Treatment lapse
56Missed or late test1 open
7Notice 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

200520102012 · Notice or report: 12014 · Over the limit: 22015 · Over the limit: 12015 · Missed or late test: 120152017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492017 · Missed or late test: 492018 · Missed or late test: 12018 · Notice or report: 12019 · Over the limit: 12019 · Missed or late test: 12019 · Notice or report: 22020 · Over the limit: 22020 · Notice or report: 220202021 · Over the limit: 32022 · Over the limit: 42022 · Missed or late test: 12022 · Notice or report: 12023 · Over the limit: 42023 · Missed or late test: 12024 · Over the limit: 42024 · Missed or late test: 22025 · Over the limit: 42025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
28% over the limit · 2564% missed or late test · 568% notice or report · 7

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×+Nitrate-Nitrite2025-10-01 · Nitrate-Nitrite: measured 10.70 MG/L vs limit 10.00 MG/L (1.1×)2025-07-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2025-04-01 · Nitrate-Nitrite: measured 13.90 MG/L vs limit 10.00 MG/L (1.4×)2025-01-01 · Nitrate-Nitrite: measured 11.30 MG/L vs limit 10.00 MG/L (1.1×)2024-10-01 · Nitrate-Nitrite: measured 36.20 MG/L vs limit 10.00 MG/L (3.6×)2024-07-01 · Nitrate-Nitrite: measured 12.10 MG/L vs limit 10.00 MG/L (1.2×)2024-04-01 · Nitrate-Nitrite: measured 12.30 MG/L vs limit 10.00 MG/L (1.2×)2024-01-01 · Nitrate-Nitrite: measured 11.90 MG/L vs limit 10.00 MG/L (1.2×)2023-10-01 · Nitrate-Nitrite: measured 10.60 MG/L vs limit 10.00 MG/L (1.1×)2023-07-01 · Nitrate-Nitrite: measured 10.70 MG/L vs limit 10.00 MG/L (1.1×)2023-04-01 · Nitrate-Nitrite: measured 12.10 MG/L vs limit 10.00 MG/L (1.2×)2023-01-01 · Nitrate-Nitrite: measured 13.00 MG/L vs limit 10.00 MG/L (1.3×)2022-10-01 · Nitrate-Nitrite: measured 12.50 MG/L vs limit 10.00 MG/L (1.2×)2022-07-01 · Nitrate-Nitrite: measured 12.30 MG/L vs limit 10.00 MG/L (1.2×)2022-04-01 · Nitrate-Nitrite: measured 12.30 MG/L vs limit 10.00 MG/L (1.2×)2022-01-01 · Nitrate-Nitrite: measured 12.70 MG/L vs limit 10.00 MG/L (1.3×)2021-10-01 · Nitrate-Nitrite: measured 12.00 MG/L vs limit 10.00 MG/L (1.2×)2021-07-01 · Nitrate-Nitrite: measured 12.40 MG/L vs limit 10.00 MG/L (1.2×)2021-04-01 · Nitrate-Nitrite: measured 12.60 MG/L vs limit 10.00 MG/L (1.3×)2020-10-01 · Nitrate-Nitrite: measured 11.70 MG/L vs limit 10.00 MG/L (1.2×)2020-01-01 · Nitrate-Nitrite: measured 10.60 MG/L vs limit 10.00 MG/L (1.1×)2019-10-01 · Nitrate-Nitrite: measured 15.50 MG/L vs limit 10.00 MG/L (1.6×)2015-07-01 · Nitrate-Nitrite: measured 10.40 MG/L vs limit 10.00 MG/L (1.0×)2014-10-01 · Nitrate-Nitrite: measured 15.80 MG/L vs limit 10.00 MG/L (1.6×)2014-07-01 · Nitrate-Nitrite: measured 17.20 MG/L vs limit 10.00 MG/L (1.7×)
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 2 results on file · action level 15 ppb

2 ppb
0 ppb

Open now (1)

  1. 2024-12-30Lead and Copper RuleLead Consumer NoticeOpen

Every violation on record

  1. 2025-10-01Nitrate-NitriteMCL, Single Samplemeasured 10.70 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  2. 2025-07-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  3. 2025-04-01Nitrate-NitriteMCL, Single Samplemeasured 13.90 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  4. 2025-01-01Nitrate-NitriteMCL, Single Samplemeasured 11.30 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  5. 2024-12-30Lead and Copper RuleLead Consumer NoticeOpen
  6. 2024-10-01Nitrate-NitriteMCL, Single Samplemeasured 36.20 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  7. 2024-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.10 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  8. 2024-06-01Revised Total Coliform RuleMONBack in compliance
  9. 2024-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.30 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  10. 2024-01-01Nitrate-NitriteMCL, Single Samplemeasured 11.90 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  11. 2023-10-01Nitrate-NitriteMCL, Single Samplemeasured 10.60 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  12. 2023-10-01Nitrate-NitriteMonitoring, RegularBack in compliance
  13. 2023-07-01Nitrate-NitriteMCL, Single Samplemeasured 10.70 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  14. 2023-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.10 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  15. 2023-01-01Nitrate-NitriteMCL, Single Samplemeasured 13.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  16. 2022-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.50 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  17. 2022-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.30 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  18. 2022-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  19. 2022-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.30 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  20. 2022-04-01Revised Total Coliform RuleMONBack in compliance
  21. 2022-01-01Nitrate-NitriteMCL, Single Samplemeasured 12.70 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  22. 2021-10-01Nitrate-NitriteMCL, Single Samplemeasured 12.00 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  23. 2021-07-01Nitrate-NitriteMCL, Single Samplemeasured 12.40 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  24. 2021-04-01Nitrate-NitriteMCL, Single Samplemeasured 12.60 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  25. 2020-10-01Nitrate-NitriteMCL, Single Samplemeasured 11.70 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
Show the other 63 entries
  1. 2020-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  2. 2020-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  3. 2020-01-01Nitrate-NitriteMCL, Single Samplemeasured 10.60 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  4. 2019-10-01Nitrate-NitriteMCL, Single Samplemeasured 15.50 MG/L · limit 10.00 MG/LPeriod ended · no return to compliance on file
  5. 2019-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  6. 2019-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  7. 2019-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  8. 2018-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  9. 2018-04-01Nitrate-NitriteMonitoring, RegularBack in compliance
  10. 2017-10-01Nitrate-NitriteMonitoring, RegularBack in compliance
  11. 2017-01-01Thallium, TotalMonitoring, RegularBack in compliance
  12. 2017-01-01Beryllium, TotalMonitoring, RegularBack in compliance
  13. 2017-01-01Antimony, TotalMonitoring, RegularBack in compliance
  14. 2017-01-01NickelMonitoring, RegularBack in compliance
  15. 2017-01-01ChlordaneMonitoring, RegularBack in compliance
  16. 2017-01-01PentachlorophenolMonitoring, RegularBack in compliance
  17. 2017-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  18. 2017-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  19. 2017-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  20. 2017-01-012, 4-DMonitoring, RegularBack in compliance
  21. 2017-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  22. 2017-01-01HeptachlorMonitoring, RegularBack in compliance
  23. 2017-01-01LassoMonitoring, RegularBack in compliance
  24. 2017-01-01AtrazineMonitoring, RegularBack in compliance
  25. 2017-01-01CarbofuranMonitoring, RegularBack in compliance
  26. 2017-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  27. 2017-01-01DinosebMonitoring, RegularBack in compliance
  28. 2017-01-01PicloramMonitoring, RegularBack in compliance
  29. 2017-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  30. 2017-01-01SimazineMonitoring, RegularBack in compliance
  31. 2017-01-01OxamylMonitoring, RegularBack in compliance
  32. 2017-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  33. 2017-01-01DalaponMonitoring, RegularBack in compliance
  34. 2017-01-01ToxapheneMonitoring, RegularBack in compliance
  35. 2017-01-01MethoxychlorMonitoring, RegularBack in compliance
  36. 2017-01-01Bhc-GammaMonitoring, RegularBack in compliance
  37. 2017-01-01EndrinMonitoring, RegularBack in compliance
  38. 2017-01-01StyreneMonitoring, RegularBack in compliance
  39. 2017-01-01EthylbenzeneMonitoring, RegularBack in compliance
  40. 2017-01-01TolueneMonitoring, RegularBack in compliance
  41. 2017-01-01BenzeneMonitoring, RegularBack in compliance
  42. 2017-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  43. 2017-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  44. 2017-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  45. 2017-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  46. 2017-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  47. 2017-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  48. 2017-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  49. 2017-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  50. 2017-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  51. 2017-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  52. 2017-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  53. 2017-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  54. 2017-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  55. 2017-01-01DichloromethaneMonitoring, RegularBack in compliance
  56. 2017-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  57. 2017-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  58. 2017-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  59. 2015-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  60. 2015-07-01Nitrate-NitriteMCL, Single Samplemeasured 10.40 MG/L · limit 10.00 MG/LBack in compliance
  61. 2014-10-01Nitrate-NitriteMCL, Single Samplemeasured 15.80 MG/L · limit 10.00 MG/LBack in compliance
  62. 2014-07-01Nitrate-NitriteMCL, Single Samplemeasured 17.20 MG/L · limit 10.00 MG/LBack in compliance
  63. 2012-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served56
Service connections17
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityLewistown
EPA ZIP on file59457

Areas served

  • Lewistown, Fergus County

Reading this record

King Ranch Colony is a community water system that draws from groundwater and serves about 56 people in Lewistown, 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.