Community Water System · PWSID 101600010

Big Sky N. Subdivision

Serves 300 peopleGroundwaterOwner: PrivatePocatello, Idaho
Nothing open right now.

On record since 2005: 129 violations. 1 over the limit · 122 missed or late tests · 6 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
0Treatment lapse
122Missed or late test
6Notice or report

More violations on record than 98% 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

2005 · Missed or late test: 120052009 · Notice or report: 220102011 · Over the limit: 12014 · Missed or late test: 272014 · Missed or late test: 272014 · Missed or late test: 272014 · Missed or late test: 272014 · Missed or late test: 272014 · Missed or late test: 2720152016 · Missed or late test: 72016 · Missed or late test: 72016 · Notice or report: 12017 · 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: 492019 · Missed or late test: 32020 · Missed or late test: 292020 · Missed or late test: 292020 · Missed or late test: 292020 · Missed or late test: 292020 · Missed or late test: 292020 · Missed or late test: 2920202021 · Missed or late test: 12021 · Notice or report: 22022 · Missed or late test: 22023 · Missed or late test: 32025 · 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 · 195% missed or late test · 1225% notice or report · 6

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

5 ppb
5 ppb
3 ppb
3 ppb

Every violation on record

  1. 2025-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  2. 2023-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
  3. 2023-10-31Lead and Copper RuleLead Consumer NoticeBack in compliance
  4. 2023-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  5. 2022-01-01Nitrate ×2Monitoring, RegularBack in compliance
  6. 2021-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  7. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  8. 2021-06-01Revised Total Coliform RuleMONBack in compliance
  9. 2020-01-01ChlordaneMonitoring, RegularBack in compliance
  10. 2020-01-01Ethylene DibromideMonitoring, RegularBack in compliance
  11. 2020-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
  12. 2020-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  13. 2020-01-01PentachlorophenolMonitoring, RegularBack in compliance
  14. 2020-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  15. 2020-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  16. 2020-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  17. 2020-01-012, 4-DMonitoring, RegularBack in compliance
  18. 2020-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  19. 2020-01-01HeptachlorMonitoring, RegularBack in compliance
  20. 2020-01-01LassoMonitoring, RegularBack in compliance
  21. 2020-01-01AtrazineMonitoring, RegularBack in compliance
  22. 2020-01-01CarbofuranMonitoring, RegularBack in compliance
  23. 2020-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  24. 2020-01-01DinosebMonitoring, RegularBack in compliance
  25. 2020-01-01PicloramMonitoring, RegularBack in compliance
Show the other 96 entries
  1. 2020-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  2. 2020-01-01SimazineMonitoring, RegularBack in compliance
  3. 2020-01-01OxamylMonitoring, RegularBack in compliance
  4. 2020-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  5. 2020-01-01GlyphosateMonitoring, RegularBack in compliance
  6. 2020-01-01EndothallMonitoring, RegularBack in compliance
  7. 2020-01-01DiquatMonitoring, RegularBack in compliance
  8. 2020-01-01DalaponMonitoring, RegularBack in compliance
  9. 2020-01-01ToxapheneMonitoring, RegularBack in compliance
  10. 2020-01-01MethoxychlorMonitoring, RegularBack in compliance
  11. 2020-01-01Bhc-GammaMonitoring, RegularBack in compliance
  12. 2020-01-01EndrinMonitoring, RegularBack in compliance
  13. 2019-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  14. 2019-01-01Nitrate ×2Monitoring, RegularBack in compliance
  15. 2017-08-15E. ColiMonitoring, Source Water (GWR)Back in compliance
  16. 2017-01-01ChlordaneMonitoring, RegularBack in compliance
  17. 2017-01-01Ethylene DibromideMonitoring, RegularBack in compliance
  18. 2017-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularBack in compliance
  19. 2017-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularBack in compliance
  20. 2017-01-01PentachlorophenolMonitoring, RegularBack in compliance
  21. 2017-01-01Benzo(a)pyreneMonitoring, RegularBack in compliance
  22. 2017-01-01HexachlorobenzeneMonitoring, RegularBack in compliance
  23. 2017-01-012, 4, 5-TpMonitoring, RegularBack in compliance
  24. 2017-01-012, 4-DMonitoring, RegularBack in compliance
  25. 2017-01-01Heptachlor epoxideMonitoring, RegularBack in compliance
  26. 2017-01-01HeptachlorMonitoring, RegularBack in compliance
  27. 2017-01-012, 3, 7, 8-TcddMonitoring, RegularBack in compliance
  28. 2017-01-01LassoMonitoring, RegularBack in compliance
  29. 2017-01-01AtrazineMonitoring, RegularBack in compliance
  30. 2017-01-01CarbofuranMonitoring, RegularBack in compliance
  31. 2017-01-01HexachlorocyclopentadieneMonitoring, RegularBack in compliance
  32. 2017-01-01DinosebMonitoring, RegularBack in compliance
  33. 2017-01-01PicloramMonitoring, RegularBack in compliance
  34. 2017-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularBack in compliance
  35. 2017-01-01SimazineMonitoring, RegularBack in compliance
  36. 2017-01-01OxamylMonitoring, RegularBack in compliance
  37. 2017-01-01Di(2-ethylhexyl) adipateMonitoring, RegularBack in compliance
  38. 2017-01-01GlyphosateMonitoring, RegularBack in compliance
  39. 2017-01-01EndothallMonitoring, RegularBack in compliance
  40. 2017-01-01DiquatMonitoring, RegularBack in compliance
  41. 2017-01-01DalaponMonitoring, RegularBack in compliance
  42. 2017-01-01ToxapheneMonitoring, RegularBack in compliance
  43. 2017-01-01MethoxychlorMonitoring, RegularBack in compliance
  44. 2017-01-01Bhc-GammaMonitoring, RegularBack in compliance
  45. 2017-01-01EndrinMonitoring, RegularBack in compliance
  46. 2017-01-01ArsenicMonitoring, RegularBack in compliance
  47. 2017-01-01BariumMonitoring, RegularBack in compliance
  48. 2017-01-01CadmiumMonitoring, RegularBack in compliance
  49. 2017-01-01ChromiumMonitoring, RegularBack in compliance
  50. 2017-01-01FluorideMonitoring, RegularBack in compliance
  51. 2017-01-01MercuryMonitoring, RegularBack in compliance
  52. 2017-01-01NickelMonitoring, RegularBack in compliance
  53. 2017-01-01Antimony, TotalMonitoring, RegularBack in compliance
  54. 2017-01-01Beryllium, TotalMonitoring, RegularBack in compliance
  55. 2017-01-01Thallium, TotalMonitoring, RegularBack in compliance
  56. 2017-01-01SeleniumMonitoring, RegularBack in compliance
  57. 2017-01-01Combined Radium (-226 and -228) ×2Monitoring, RegularBack in compliance
  58. 2017-01-01Combined Uranium ×2Monitoring, RegularBack in compliance
  59. 2017-01-01Gross Alpha, Excl. Radon and U ×2Monitoring, RegularBack in compliance
  60. 2017-01-01Lead and Copper RuleLead Consumer NoticeBack in compliance
  61. 2016-12-01Revised Total Coliform RuleMONBack in compliance
  62. 2016-11-14Revised Total Coliform RuleRPTBack in compliance
  63. 2016-10-01Revised Total Coliform RuleMONBack in compliance
  64. 2016-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  65. 2016-07-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  66. 2016-06-01Revised Total Coliform RuleMONBack in compliance
  67. 2016-05-01Revised Total Coliform RuleMONBack in compliance
  68. 2016-04-01Coliform (TCR)Monitoring, Routine Minor (TCR)Back in compliance
  69. 2014-01-01StyreneMonitoring, RegularBack in compliance
  70. 2014-01-01EthylbenzeneMonitoring, RegularBack in compliance
  71. 2014-01-01TolueneMonitoring, RegularBack in compliance
  72. 2014-01-01BenzeneMonitoring, RegularBack in compliance
  73. 2014-01-01ChlorobenzeneMonitoring, RegularBack in compliance
  74. 2014-01-01TetrachloroethyleneMonitoring, RegularBack in compliance
  75. 2014-01-011,1,2-TrichloroethaneMonitoring, RegularBack in compliance
  76. 2014-01-01TrichloroethyleneMonitoring, RegularBack in compliance
  77. 2014-01-011,2-DichloropropaneMonitoring, RegularBack in compliance
  78. 2014-01-01Carbon tetrachlorideMonitoring, RegularBack in compliance
  79. 2014-01-011,1,1-TrichloroethaneMonitoring, RegularBack in compliance
  80. 2014-01-011,2-DichloroethaneMonitoring, RegularBack in compliance
  81. 2014-01-01trans-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  82. 2014-01-011,1-DichloroethyleneMonitoring, RegularBack in compliance
  83. 2014-01-01Vinyl chlorideMonitoring, RegularBack in compliance
  84. 2014-01-01p-DichlorobenzeneMonitoring, RegularBack in compliance
  85. 2014-01-01o-DichlorobenzeneMonitoring, RegularBack in compliance
  86. 2014-01-01DichloromethaneMonitoring, RegularBack in compliance
  87. 2014-01-01Xylenes, TotalMonitoring, RegularBack in compliance
  88. 2014-01-01cis-1,2-DichloroethyleneMonitoring, RegularBack in compliance
  89. 2014-01-011,2,4-TrichlorobenzeneMonitoring, RegularBack in compliance
  90. 2014-01-01Combined Radium (-226 and -228) ×2Monitoring, RegularBack in compliance
  91. 2014-01-01Combined Uranium ×2Monitoring, RegularBack in compliance
  92. 2014-01-01Gross Alpha, Excl. Radon and U ×2Monitoring, RegularBack in compliance
  93. 2011-01-01Coliform (TCR)MCL, Monthly (TCR)Back in compliance
  94. 2009-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  95. 2009-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  96. 2005-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance

System details

Population served300
Service connections212
Water sourceGroundwater
System typeCommunity Water System
OwnerPrivate
StatusActive
CityPocatello
EPA ZIP on file83204

Areas served

  • Pocatello

Reading this record

Big Sky N. Subdivision is a community water system that draws from groundwater and serves about 300 people in Pocatello, 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.