Community Water System · PWSID ID4200089

Mellen Subd Water Dist

Serves 250 peopleGroundwater PurchasedOwner: PrivateMountain Home, Idaho
Nothing open that measures the water, but 2 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 1999: 87 violations. 85 missed or late tests · 2 notices or reports. Most recent began 2023-01-01.

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
85Missed or late test2 open
2Notice or report

More violations on record than 97% 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

1999 · Notice or report: 12000200520102011 · Missed or late test: 120152017 · Missed or late test: 22017 · Notice or report: 12018 · Missed or late test: 12020 · Missed or late test: 72020 · Missed or late test: 720202021 · Missed or late test: 102021 · Missed or late test: 102022 · Missed or late test: 22023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622023 · Missed or late test: 622025
One square ≈ 6 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
98% missed or late test · 852% notice or report · 2

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 3 results on file · action level 15 ppb

5 ppb
0 ppb
0 ppb

Open now (2)

  1. 2021-12-30Lead and Copper RuleLead Consumer NoticeOpen
  2. 2018-12-30Lead and Copper RuleLead Consumer NoticeOpen

Every violation on record

  1. 2023-01-01SodiumMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2023-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2023-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2023-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2023-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2023-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2023-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2023-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2023-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2023-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2023-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2023-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2023-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2023-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2023-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2023-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2023-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2023-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2023-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2023-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2023-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2023-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2023-01-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2023-01-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2023-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 60 entries
  1. 2023-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  2. 2023-01-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2023-01-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2023-01-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2023-01-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2023-01-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2023-01-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2023-01-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2023-01-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2023-01-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2023-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2023-01-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2023-01-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2023-01-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2023-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2023-01-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2023-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2023-01-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2023-01-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2023-01-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2023-01-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2023-01-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2023-01-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2023-01-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2023-01-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2023-01-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2023-01-01FluorideMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2023-01-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2023-01-01SeleniumMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2023-01-01Thallium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2023-01-01Beryllium, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2023-01-01Antimony, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2023-01-01NickelMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2023-01-01MercuryMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2023-01-01ChromiumMonitoring, RegularPeriod ended · no return to compliance on file
  36. 2023-01-01CadmiumMonitoring, RegularPeriod ended · no return to compliance on file
  37. 2023-01-01BariumMonitoring, RegularPeriod ended · no return to compliance on file
  38. 2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  39. 2022-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  40. 2021-12-30Lead and Copper RuleLead Consumer NoticeOpen
  41. 2021-12-01Revised Total Coliform RuleMONBack in compliance
  42. 2021-11-01Revised Total Coliform RuleMONBack in compliance
  43. 2021-10-01Chlorine ×3Monitoring and Reporting (DBP)Back in compliance
  44. 2021-10-01Revised Total Coliform RuleMONBack in compliance
  45. 2021-09-01Revised Total Coliform RuleMONBack in compliance
  46. 2021-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  47. 2021-06-01Revised Total Coliform RuleMONBack in compliance
  48. 2020-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  49. 2020-09-01Revised Total Coliform RuleMONBack in compliance
  50. 2020-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  51. 2020-06-01Revised Total Coliform RuleMONBack in compliance
  52. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  53. 2020-01-01Combined UraniumMonitoring, RegularPeriod ended · no return to compliance on file
  54. 2020-01-01Gross Alpha, Excl. Radon and UMonitoring, RegularPeriod ended · no return to compliance on file
  55. 2018-12-30Lead and Copper RuleLead Consumer NoticeOpen
  56. 2017-06-17Groundwater RuleFailure to Consult with StateBack in compliance
  57. 2017-01-01Radium-228Monitoring, RegularPeriod ended · no return to compliance on file
  58. 2017-01-01SodiumMonitoring, RegularPeriod ended · no return to compliance on file
  59. 2011-01-01ArsenicMonitoring, RegularPeriod ended · no return to compliance on file
  60. 1999-10-19Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served250
Service connections119
Water sourceGroundwater Purchased
System typeCommunity Water System
OwnerPrivate
StatusActive
CityMountain Home
EPA ZIP on file83647

Areas served

  • Elmore County

Reading this record

Mellen Subd Water Dist is a community water system that draws from groundwater purchased and serves about 250 people in Mountain Home, 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.