Community Water System · PWSID AK2270338

Chefornak Water System

Serves 513 peopleGroundwaterOwner: Native AmericanChefornak, Alaska
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 2002: 136 violations. 3 treatment lapses · 122 missed or late tests · 11 notices or reports. Most recent began 2025-04-01.

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
3Treatment lapse
122Missed or late test1 open
11Notice or report

More violations on record than 91% of active water systems in Alaska. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

2002 · Missed or late test: 12003 · Missed or late test: 22004 · Notice or report: 12005 · Missed or late test: 12005 · Notice or report: 120052006 · Missed or late test: 22007 · Missed or late test: 12007 · Notice or report: 12008 · Missed or late test: 220102011 · Missed or late test: 12014 · Notice or report: 120152016 · Missed or late test: 12016 · Notice or report: 12017 · Missed or late test: 12018 · Missed or late test: 12018 · Notice or report: 12019 · Missed or late test: 22020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Missed or late test: 252020 · Notice or report: 120202021 · Missed or late test: 72021 · Missed or late test: 72021 · Missed or late test: 72021 · Notice or report: 12022 · Missed or late test: 42022 · Missed or late test: 42022 · Notice or report: 12023 · Treatment lapse: 22023 · Missed or late test: 82023 · Missed or late test: 82023 · Missed or late test: 82023 · Notice or report: 12024 · Treatment lapse: 12024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Missed or late test: 312024 · Notice or report: 12025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025 · Missed or late test: 322025
One square ≈ 3 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
2% treatment lapse · 390% missed or late test · 1228% notice or report · 11

Across Alaska, 88% of violations are missed or late tests and 2% 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 6 results on file · action level 15 ppb

4.9 ppb
3.5 ppb
1 ppb
0 ppb
0 ppb
0 ppb

Open now (1)

  1. 2023-03-06Lead and Copper RuleLead Consumer NoticeOpen

Every violation on record

  1. 2025-04-01Revised Total Coliform RuleMONBack in compliance
  2. 2025-01-01ChlordaneMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-01-01Ethylene DibromideMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-01-011, 2-Dibromo-3-ChloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-01-01Total Polychlorinated Biphenyls (PCB)Monitoring, RegularPeriod ended · no return to compliance on file
  6. 2025-01-01PentachlorophenolMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2025-01-01Benzo(a)pyreneMonitoring, RegularPeriod ended · no return to compliance on file
  8. 2025-01-01HexachlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  9. 2025-01-012, 4, 5-TpMonitoring, RegularPeriod ended · no return to compliance on file
  10. 2025-01-012, 4-DMonitoring, RegularPeriod ended · no return to compliance on file
  11. 2025-01-01Heptachlor epoxideMonitoring, RegularPeriod ended · no return to compliance on file
  12. 2025-01-01HeptachlorMonitoring, RegularPeriod ended · no return to compliance on file
  13. 2025-01-012, 3, 7, 8-TcddMonitoring, RegularPeriod ended · no return to compliance on file
  14. 2025-01-01LassoMonitoring, RegularPeriod ended · no return to compliance on file
  15. 2025-01-01AtrazineMonitoring, RegularPeriod ended · no return to compliance on file
  16. 2025-01-01CarbofuranMonitoring, RegularPeriod ended · no return to compliance on file
  17. 2025-01-01HexachlorocyclopentadieneMonitoring, RegularPeriod ended · no return to compliance on file
  18. 2025-01-01DinosebMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2025-01-01PicloramMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2025-01-01Di(2-ethylhexyl) phthalateMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2025-01-01SimazineMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2025-01-01OxamylMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2025-01-01Di(2-ethylhexyl) adipateMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2025-01-01GlyphosateMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2025-01-01EndothallMonitoring, RegularPeriod ended · no return to compliance on file
Show the other 110 entries
  1. 2025-01-01DiquatMonitoring, RegularPeriod ended · no return to compliance on file
  2. 2025-01-01DalaponMonitoring, RegularPeriod ended · no return to compliance on file
  3. 2025-01-01ToxapheneMonitoring, RegularPeriod ended · no return to compliance on file
  4. 2025-01-01MethoxychlorMonitoring, RegularPeriod ended · no return to compliance on file
  5. 2025-01-01Bhc-GammaMonitoring, RegularPeriod ended · no return to compliance on file
  6. 2025-01-01EndrinMonitoring, RegularPeriod ended · no return to compliance on file
  7. 2025-01-01Revised Total Coliform RuleMONBack in compliance
  8. 2024-12-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  9. 2024-11-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  10. 2024-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  11. 2024-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  12. 2024-08-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  13. 2024-06-01Groundwater RuleFailure To Address DeficiencyBack in compliance
  14. 2024-06-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  15. 2024-05-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  16. 2024-04-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  17. 2024-02-01Revised Total Coliform RuleMONBack in compliance
  18. 2024-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  19. 2024-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  20. 2024-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  21. 2024-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  22. 2024-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  23. 2024-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  24. 2024-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  25. 2024-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  26. 2024-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  27. 2024-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  28. 2024-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  29. 2024-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  30. 2024-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  31. 2024-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  32. 2024-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  33. 2024-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  34. 2024-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  35. 2024-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  36. 2024-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  37. 2024-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  38. 2024-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  39. 2024-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  40. 2024-01-01Revised Total Coliform RuleMONBack in compliance
  41. 2023-11-01Revised Total Coliform RuleMONBack in compliance
  42. 2023-10-13Groundwater Rule ×2Failure To Address DeficiencyBack in compliance
  43. 2023-10-01Revised Total Coliform RuleMONBack in compliance
  44. 2023-07-15Groundwater RuleFailure to Consult with StateBack in compliance
  45. 2023-07-01Revised Total Coliform RuleMONBack in compliance
  46. 2023-03-06Lead and Copper RuleLead Consumer NoticeOpen
  47. 2023-03-01Revised Total Coliform RuleMONBack in compliance
  48. 2023-02-01Revised Total Coliform RuleMONBack in compliance
  49. 2023-01-01NitrateMonitoring, RegularPeriod ended · no return to compliance on file
  50. 2023-01-01Revised Total Coliform RuleMONBack in compliance
  51. 2022-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  52. 2022-09-01Revised Total Coliform RuleMONBack in compliance
  53. 2022-06-01Revised Total Coliform RuleMONBack in compliance
  54. 2022-03-01Revised Total Coliform RuleMONBack in compliance
  55. 2022-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  56. 2021-11-01Revised Total Coliform RuleMONBack in compliance
  57. 2021-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  58. 2021-07-01Revised Total Coliform RuleMONBack in compliance
  59. 2021-06-01Revised Total Coliform RuleMONBack in compliance
  60. 2021-05-01Revised Total Coliform RuleMONBack in compliance
  61. 2021-02-01Revised Total Coliform RuleMONBack in compliance
  62. 2021-01-01NitrateMonitoring, RegularBack in compliance
  63. 2021-01-01Revised Total Coliform RuleMONBack in compliance
  64. 2020-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  65. 2020-06-01Revised Total Coliform RuleMONBack in compliance
  66. 2020-05-01Revised Total Coliform RuleMONBack in compliance
  67. 2020-04-01Revised Total Coliform RuleMONBack in compliance
  68. 2020-01-01StyreneMonitoring, RegularPeriod ended · no return to compliance on file
  69. 2020-01-01EthylbenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  70. 2020-01-01TolueneMonitoring, RegularPeriod ended · no return to compliance on file
  71. 2020-01-01BenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  72. 2020-01-01ChlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  73. 2020-01-01TetrachloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  74. 2020-01-011,1,2-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  75. 2020-01-01TrichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  76. 2020-01-011,2-DichloropropaneMonitoring, RegularPeriod ended · no return to compliance on file
  77. 2020-01-01Carbon tetrachlorideMonitoring, RegularPeriod ended · no return to compliance on file
  78. 2020-01-011,1,1-TrichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  79. 2020-01-011,2-DichloroethaneMonitoring, RegularPeriod ended · no return to compliance on file
  80. 2020-01-01trans-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  81. 2020-01-011,1-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  82. 2020-01-01Vinyl chlorideMonitoring, RegularPeriod ended · no return to compliance on file
  83. 2020-01-01p-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  84. 2020-01-01o-DichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  85. 2020-01-01DichloromethaneMonitoring, RegularPeriod ended · no return to compliance on file
  86. 2020-01-01Xylenes, TotalMonitoring, RegularPeriod ended · no return to compliance on file
  87. 2020-01-01cis-1,2-DichloroethyleneMonitoring, RegularPeriod ended · no return to compliance on file
  88. 2020-01-011,2,4-TrichlorobenzeneMonitoring, RegularPeriod ended · no return to compliance on file
  89. 2020-01-01NitrateMonitoring, RegularBack in compliance
  90. 2019-02-01Revised Total Coliform RuleMONBack in compliance
  91. 2019-01-01Revised Total Coliform RuleMONBack in compliance
  92. 2018-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  93. 2018-03-01Revised Total Coliform RuleMONBack in compliance
  94. 2017-02-01Revised Total Coliform RuleMONBack in compliance
  95. 2016-12-01Revised Total Coliform RuleMONBack in compliance
  96. 2016-04-01Revised Total Coliform RuleOtherBack in compliance
  97. 2014-07-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  98. 2011-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  99. 2008-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  100. 2008-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  101. 2007-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  102. 2007-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  103. 2006-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  104. 2006-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  105. 2005-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  106. 2005-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  107. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  108. 2003-07-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  109. 2003-01-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance
  110. 2002-07-01Lead and Copper RuleInitial Tap Sampling for Pb and CuBack in compliance

System details

Population served513
Service connections7
Water sourceGroundwater
System typeCommunity Water System
OwnerNative American
StatusActive
CityChefornak
EPA ZIP on file99561

Areas served

  • Chefornak, Bethel Census Area

Reading this record

Chefornak Water System is a community water system that draws from groundwater and serves about 513 people in Chefornak, Alaska. 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.