Community Water System · PWSID AK2340442

Shaktoolik Water System

Serves 270 peopleSurface WaterOwner: Native AmericanShaktoolik, Alaska
Nothing open right now.

On record since 2003: 151 violations. 14 over the limit · 2 treatment lapses · 124 missed or late tests · 11 notices or reports. Most recent began 2025-09-01.

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

14Over the limit
2Treatment lapse
124Missed or late test
11Notice or report

More violations on record than 92% 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

2003 · Notice or report: 12004 · Notice or report: 12005 · Notice or report: 120052006 · Missed or late test: 12006 · Notice or report: 12008 · Missed or late test: 12008 · Notice or report: 120102011 · Notice or report: 12012 · Notice or report: 12014 · Over the limit: 22014 · Notice or report: 22015 · Over the limit: 42015 · Missed or late test: 220152016 · Over the limit: 42017 · Over the limit: 22017 · Missed or late test: 32017 · Notice or report: 12019 · Over the limit: 12019 · Missed or late test: 52019 · Missed or late test: 52020 · Missed or late test: 132020 · Missed or late test: 132020 · Missed or late test: 132020 · Missed or late test: 132020 · Notice or report: 120202021 · Missed or late test: 212021 · Missed or late test: 212021 · Missed or late test: 212021 · Missed or late test: 212021 · Missed or late test: 212021 · Missed or late test: 212022 · Missed or late test: 102022 · Missed or late test: 102022 · Missed or late test: 102023 · Over the limit: 12023 · Missed or late test: 92023 · Missed or late test: 92023 · Missed or late test: 92024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372024 · Missed or late test: 372025 · Treatment lapse: 22025 · Missed or late test: 222025 · Missed or late test: 222025 · Missed or late test: 222025 · Missed or late test: 222025 · Missed or late test: 222025 · Missed or late test: 222025
One square ≈ 4 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.
9% over the limit · 141% treatment lapse · 282% missed or late test · 1247% notice or report · 11

Across Alaska, 88% of violations are missed or late tests and 2% are water over a limit.

How far over the limit

at the limit2×5×10×100×+Trihalomethanes (TTHM)2023-04-01 · Trihalomethanes (TTHM): measured 0.0880 MG/L vs limit 0.0800 MG/L (1.1×)2019-10-01 · Trihalomethanes (TTHM): measured 0.0830 MG/L vs limit 0.0800 MG/L (1.0×)2017-04-01 · Trihalomethanes (TTHM): measured 0.0900 MG/L vs limit 0.0800 MG/L (1.1×)2017-01-01 · Trihalomethanes (TTHM): measured 0.1110 MG/L vs limit 0.0800 MG/L (1.4×)2016-10-01 · Trihalomethanes (TTHM): measured 0.1020 MG/L vs limit 0.0800 MG/L (1.3×)2016-07-01 · Trihalomethanes (TTHM): measured 0.0950 MG/L vs limit 0.0800 MG/L (1.2×)2016-04-01 · Trihalomethanes (TTHM): measured 0.1130 MG/L vs limit 0.0800 MG/L (1.4×)2016-01-01 · Trihalomethanes (TTHM): measured 0.1030 MG/L vs limit 0.0800 MG/L (1.3×)2015-10-01 · Trihalomethanes (TTHM): measured 0.1210 MG/L vs limit 0.0800 MG/L (1.5×)2015-07-01 · Trihalomethanes (TTHM): measured 0.1270 MG/L vs limit 0.0800 MG/L (1.6×)2015-04-01 · Trihalomethanes (TTHM): measured 0.1350 MG/L vs limit 0.0800 MG/L (1.7×)2015-01-01 · Trihalomethanes (TTHM): measured 0.1370 MG/L vs limit 0.0800 MG/L (1.7×)2014-10-01 · Trihalomethanes (TTHM): measured 0.1400 MG/L vs limit 0.0800 MG/L (1.8×)2014-07-01 · Trihalomethanes (TTHM): measured 0.1380 MG/L vs limit 0.0800 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 9 results on file · action level 15 ppb

4.2 ppb
3.4 ppb
2.5 ppb
2.3 ppb
1.6 ppb
1.1 ppb
0.95 ppb
0.84 ppb
0 ppb

Copper, 90th percentile 2 results on file · action level 1.3 mg/L

2.3 mg/L
1.5 mg/L

Every violation on record

  1. 2025-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  2. 2025-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  3. 2025-09-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  4. 2025-09-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  5. 2025-08-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  6. 2025-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  7. 2025-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  8. 2025-06-01Surface water filtration (IESWTR)Monthly Turbidity Exceed (Enhanced SWTR)Period ended · no return to compliance on file
  9. 2025-06-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  10. 2025-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  11. 2025-06-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  12. 2025-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  13. 2025-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  14. 2025-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  15. 2025-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  16. 2025-04-01Revised Total Coliform RuleMONBack in compliance
  17. 2025-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  18. 2025-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  19. 2025-03-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  20. 2025-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  21. 2025-02-01Revised Total Coliform RuleMONBack in compliance
  22. 2025-02-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  23. 2025-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  24. 2025-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  25. 2024-12-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
Show the other 126 entries
  1. 2024-12-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  2. 2024-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  3. 2024-12-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  4. 2024-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  5. 2024-11-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  6. 2024-11-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  7. 2024-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  8. 2024-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  9. 2024-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  10. 2024-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  11. 2024-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
  12. 2024-10-01Revised Total Coliform RuleMONPeriod ended · no return to compliance on file
  13. 2024-10-01ChlorineMonitoring and Reporting (DBP)Period ended · no return to compliance on file
  14. 2024-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  15. 2024-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  16. 2024-09-01Revised Total Coliform RuleMONBack in compliance
  17. 2024-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  18. 2024-09-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  19. 2024-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  20. 2024-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  21. 2024-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  22. 2024-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  23. 2024-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  24. 2024-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  25. 2024-05-01Revised Total Coliform RuleMONBack in compliance
  26. 2024-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  27. 2024-05-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  28. 2024-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  29. 2024-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  30. 2024-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  31. 2024-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Period ended · no return to compliance on file
  32. 2024-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  33. 2024-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Period ended · no return to compliance on file
  34. 2024-03-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  35. 2024-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  36. 2024-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  37. 2023-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  38. 2023-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  39. 2023-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  40. 2023-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  41. 2023-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  42. 2023-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  43. 2023-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0880 MG/L · limit 0.0800 MG/LBack in compliance
  44. 2023-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  45. 2023-02-01Revised Total Coliform RuleMONBack in compliance
  46. 2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  47. 2022-12-01Revised Total Coliform RuleMONBack in compliance
  48. 2022-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  49. 2022-10-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  50. 2022-10-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  51. 2022-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  52. 2022-08-01Revised Total Coliform RuleMONBack in compliance
  53. 2022-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  54. 2022-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  55. 2022-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  56. 2022-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  57. 2021-12-01Revised Total Coliform RuleMONBack in compliance
  58. 2021-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  59. 2021-11-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  60. 2021-09-01Revised Total Coliform RuleMONBack in compliance
  61. 2021-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  62. 2021-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  63. 2021-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  64. 2021-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  65. 2021-07-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  66. 2021-06-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  67. 2021-06-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  68. 2021-05-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  69. 2021-05-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  70. 2021-05-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  71. 2021-05-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  72. 2021-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  73. 2021-04-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  74. 2021-02-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  75. 2021-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  76. 2021-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  77. 2021-01-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  78. 2020-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  79. 2020-11-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  80. 2020-10-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  81. 2020-10-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  82. 2020-09-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  83. 2020-08-01Surface water filtration (IESWTR)Monitoring, Turbidity (Enhanced SWTR)Back in compliance
  84. 2020-07-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  85. 2020-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  86. 2020-04-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  87. 2020-04-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  88. 2020-04-01Revised Total Coliform RuleMONBack in compliance
  89. 2020-03-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  90. 2020-02-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  91. 2020-01-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  92. 2019-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  93. 2019-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0830 MG/L · limit 0.0800 MG/LBack in compliance
  94. 2019-09-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  95. 2019-08-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  96. 2019-08-01Revised Total Coliform RuleMONBack in compliance
  97. 2019-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  98. 2017-12-01Surface water treatment (SWTR)Monitoring of Treatment (SWTR-Filter)Back in compliance
  99. 2017-12-01Revised Total Coliform RuleMONBack in compliance
  100. 2017-10-01ChlorineMonitoring and Reporting (DBP)Back in compliance
  101. 2017-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  102. 2017-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0900 MG/L · limit 0.0800 MG/LBack in compliance
  103. 2017-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1110 MG/L · limit 0.0800 MG/LBack in compliance
  104. 2016-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1020 MG/L · limit 0.0800 MG/LBack in compliance
  105. 2016-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.0950 MG/L · limit 0.0800 MG/LBack in compliance
  106. 2016-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1130 MG/L · limit 0.0800 MG/LBack in compliance
  107. 2016-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1030 MG/L · limit 0.0800 MG/LBack in compliance
  108. 2015-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1210 MG/L · limit 0.0800 MG/LBack in compliance
  109. 2015-08-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
  110. 2015-08-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
  111. 2015-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1270 MG/L · limit 0.0800 MG/LBack in compliance
  112. 2015-04-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1350 MG/L · limit 0.0800 MG/LBack in compliance
  113. 2015-01-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1370 MG/L · limit 0.0800 MG/LBack in compliance
  114. 2014-10-02Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
  115. 2014-10-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1400 MG/L · limit 0.0800 MG/LBack in compliance
  116. 2014-07-01Trihalomethanes (TTHM)MCL, Averagemeasured 0.1380 MG/L · limit 0.0800 MG/LBack in compliance
  117. 2014-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  118. 2012-06-07Unknown contaminantSanitary Survey (TCR)Back in compliance
  119. 2011-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  120. 2008-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  121. 2008-07-01Surface water treatment (LT2)Monitoring, Source Water (LT2)Back in compliance
  122. 2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  123. 2006-01-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
  124. 2005-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  125. 2004-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
  126. 2003-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served270
Service connections77
Water sourceSurface Water
System typeCommunity Water System
OwnerNative American
StatusActive
CityShaktoolik
EPA ZIP on file99771

Areas served

  • Shaktoolik, Nome Census Area

Reading this record

Shaktoolik Water System is a community water system that draws from surface water and serves about 270 people in Shaktoolik, 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.