Public water system record
Kobuk Water System
Serves Kobuk, Northwest Arctic Borough, AK · 93 people served
Federal records show 33 health-based violations and 91 monitoring/reporting issues for Kobuk Water System in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.
System profile
Source water
Groundwater
ZIP
99751
EPA system ID
AK2340565
- Health-based violations, last 10 years
- 33
- Resolved
- 33
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 91
Key facts
- Kobuk Water System draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
- Most recent enforcement action: boil water order by Alaska, October 2025.
- Record on file since 1985, with 9 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 47 service lines.
Check whether Kobuk Water System serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 1, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 1, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 1, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 1, 2024 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Nov 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Sep 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | May 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 1, 2022 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Apr 1, 2021 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Nov 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Oct 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jul 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Apr 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 1, 2019 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Dec 1, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 1, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 1, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Sep 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Mar 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jan 1, 2017 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 29, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 29, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 29, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 29, 2016 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Feb 10, 2013 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Groundwater Rule
Monitoring and reporting
|
Dec 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Groundwater Rule
Monitoring and reporting
|
Aug 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Aug 1, 2025 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
May 1, 2025 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Apr 1, 2025 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Feb 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2025 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Dec 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Sep 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Jul 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Jun 1, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Apr 2, 2024 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2024 | Active |
|
Groundwater Rule
Monitoring and reporting
|
Nov 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Aug 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Jun 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
May 1, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Chlorine
Monitoring and reporting
|
Apr 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 26, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 26, 2023 | Resolved |
|
Public Notice
OTHER
|
Feb 26, 2023 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Feb 1, 2023 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Styrene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Nov 1, 2021 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Sep 1, 2021 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Dec 1, 2017 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Nov 1, 2017 | Resolved |
|
Groundwater Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2016 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2016 | Resolved |
Full record since 1985
EPA's records for Kobuk Water System go back to 1985. Before October 19, 2016 they list 9 health-based violations (8 resolved, 1 archived by EPA without a recorded fix) and 281 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 18 |
| 1990s | 0 | 81 |
| 2000s | 1 | 55 |
| 2010 to October 18, 2016 | 8 | 127 |
| October 19, 2016 to 2019 | 17 | 4 |
| 2020s | 11 | 84 |
Most recent health-based violation before October 19, 2016: Groundwater Rule, began February 2016, Resolved.
Show all 9 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Feb 29, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 29, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 29, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 29, 2016 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Nov 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Nov 1, 2013 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 19, 2013 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Feb 10, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2002 | Archived |
Enforcement actions
Alaska regulators took 3 formal enforcement actions against Kobuk Water System and issued 19 boil water orders between 2003 and 2025. The most recent was a boil water order in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 27, 2025 | Alaska | Boil water order | 1 violation |
| Oct 15, 2024 | Alaska | Boil water order | 1 violation |
| Dec 12, 2022 | Alaska | Boil water order | 1 violation |
| Nov 12, 2022 | Alaska | Boil water order | 1 violation |
| Apr 3, 2022 | Alaska | Boil water order | 1 violation |
| Jul 26, 2021 | Alaska | Boil water order | 1 violation |
| Jul 9, 2021 | Alaska | Boil water order | 1 violation |
| Jun 21, 2021 | Alaska | Boil water order | 1 violation |
| Sep 18, 2020 | Alaska | Boil water order | 1 violation |
| Aug 12, 2020 | Alaska | Boil water order | 1 violation |
| Sep 9, 2019 | Alaska | Boil water order | 1 violation |
| Aug 7, 2019 | Alaska | Boil water order | 1 violation |
| Jun 1, 2018 | Alaska | Boil water order | 1 violation |
| Oct 31, 2017 | Alaska | Boil water order | 1 violation |
| Oct 24, 2017 | Alaska | Boil water order | 1 violation |
| Jul 26, 2016 | Alaska | Boil water order | 1 violation |
| Jul 22, 2016 | Alaska | Boil water order | 1 violation |
| Nov 14, 2014 | Alaska | Boil water order | 1 violation |
| May 29, 2008 | Alaska | Compliance order (no penalty) | 12 violations: Combined Uranium, Combined Radium (-226 and -228), Gross Alpha, Excl. Radon and U |
| Jun 13, 2006 | Alaska | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Oct 26, 2004 | Alaska | Compliance order (no penalty) | 2 violations: Consumer Confidence Rule |
| Jan 22, 2003 | Alaska | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Groundwater Rule
33 incidentsThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Kobuk Water System draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Kobuk Water System must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Kobuk Water System for a copy.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Alaska.
Certified drinking water labs by state EPA guidance for private wells