Community Water System · PWSID ID4200073

Mountain Sage

Serves 65 peopleGroundwaterOwner: PrivateBoise, Idaho
Nothing open that measures the water, but 3 open testing or paperwork violations.

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: 73 violations. 1 over the limit · 1 treatment lapse · 67 missed or late tests · 4 notices or reports. Most recent began 2025-07-01.

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

1Over the limit
1Treatment lapse
67Missed or late test1 open
4Notice or report2 open

More violations on record than 96% of active water systems in Idaho. 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: 11998 · Missed or late test: 21999 · Missed or late test: 22000 · Missed or late test: 12000200520102012 · Missed or late test: 12013 · Missed or late test: 22013 · Notice or report: 120152016 · Missed or late test: 12017 · Missed or late test: 12018 · Notice or report: 120202022 · Missed or late test: 22024 · Treatment lapse: 12024 · Notice or report: 12025 · Over the limit: 12025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Missed or late test: 542025 · Notice or report: 12025
One square ≈ 5 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
1% over the limit · 11% treatment lapse · 192% missed or late test · 675% notice or report · 4

Across Idaho, 80% of violations are missed or late tests and 5% 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

3 ppb
0 ppb
0 ppb
0 ppb

Open now (3)

  1. 2025-01-03Public NoticePN Violation for NPDWR ViolationOpen
  2. 2016-12-30Lead and Copper RuleLead Consumer NoticeOpen
  3. 2013-11-07Public NoticePN Violation for NPDWR ViolationOpen

Every violation on record

  1. 2025-07-01Combined UraniumMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2025-07-01Radium-228Monitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-07-01Radium-226Monitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-07-01Gross Alpha, Excl. Radon and UMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-07-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2025-07-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2025-07-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2025-07-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2025-07-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2025-07-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2025-07-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2025-07-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2025-07-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2025-07-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2025-07-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2025-07-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2025-07-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2025-07-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2025-07-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2025-07-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2025-07-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2025-07-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2025-07-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2025-07-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2025-07-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 48 entries
  1. 2025-07-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2025-07-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-07-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-07-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-07-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2025-07-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2025-07-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2025-07-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2025-07-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2025-07-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2025-07-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2025-07-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2025-07-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2025-07-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2025-07-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2025-07-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2025-07-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2025-07-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2025-07-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2025-07-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2025-07-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2025-07-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2025-07-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2025-07-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2025-07-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2025-07-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2025-07-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2025-07-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2025-07-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2025-02-01Revised Total Coliform RuleMCLPeriod ended · no return to compliance on file
  31. 2025-01-03Public NoticePN Violation for NPDWR ViolationOpen
  32. 2024-10-17Lead service line inventoryRPTBack in compliance
  33. 2024-10-17Lead service line inventoryTTBack in compliance
  34. 2022-10-01E. ColiFailure to Conduct Assessment MonitoringPeriod ended · no return to compliance on file
  35. 2022-10-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  36. 2018-04-02Groundwater RuleFailure to Consult with StateBack in compliance
  37. 2017-06-01E. ColiFailure to Conduct Assessment MonitoringBack in compliance
  38. 2016-12-30Lead and Copper RuleLead Consumer NoticeOpen
  39. 2013-11-07Public NoticePN Violation for NPDWR ViolationOpen
  40. 2013-03-01E. ColiFailure to Conduct Assessment MonitoringBack in compliance
  41. 2013-01-01E. ColiFailure to Conduct Assessment MonitoringBack in compliance
  42. 2012-12-01E. ColiFailure to Conduct Assessment MonitoringBack in compliance
  43. 2000-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  44. 1999-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  45. 1999-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  46. 1998-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  47. 1998-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  48. 1997-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance

System details

Population served65
Service connections28
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityBoise
EPA ZIP on file83707

Areas served

  • Elmore County

Reading this record

Mountain Sage is a community water system that draws from groundwater and serves about 65 people in Boise, Idaho. 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.