Public water system record
Koliganek Water System
Serves Koliganek, Dillingham Census Area, AK · 170 people served
Federal records show 10 health-based violations and 40 monitoring/reporting issues for Koliganek Water System in the last ten years. The most serious issue in this window was a resolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 10
- Resolved
- 10
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 40
Key facts
- Koliganek Water System draws water from 2 wells.
- Most recent enforcement action: boil water order by Alaska, December 2025.
- Record on file since 1979, with 5 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 58 service lines.
Check whether Koliganek 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 27, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 27, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 27, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 27, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Aug 27, 2018 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2014 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2014 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2014 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2014 | Resolved | No |
|
Groundwater Rule
Treatment technique failure
|
140 | Jun 1, 2014 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Mar 20, 2024 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2023 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2021 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2017 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2017 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2011 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Combined Uranium
Monitoring and reporting
|
Jan 1, 2008 | Resolved |
|
Gross Alpha, Excl. Radon and U
Monitoring and reporting
|
Jan 1, 2008 | Resolved |
|
Combined Radium (-226 and -228)
Monitoring and reporting
|
Jan 1, 2008 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Mar 5, 2004 |
Active
Enforcement action in place
|
Full record since 1979
EPA's records for Koliganek Water System go back to 1979. Before October 19, 2016 they list 5 health-based violations (5 resolved) and 317 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 1 |
| 1980s | 0 | 16 |
| 1990s | 0 | 42 |
| 2000s | 0 | 70 |
| 2010 to October 18, 2016 | 5 | 188 |
| October 19, 2016 to 2019 | 5 | 7 |
| 2020s | 0 | 6 |
Most recent health-based violation before October 19, 2016: Groundwater Rule, began June 2014, Resolved.
Show all 5 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
|
Groundwater Rule
Treatment technique failure
|
Jun 1, 2014 | Resolved |
Enforcement actions
Alaska regulators took 1 formal enforcement action against Koliganek Water System and issued 13 boil water orders between 2010 and 2025. The most recent was a boil water order in December 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 18, 2025 | Alaska | Boil water order | 1 violation |
| May 20, 2025 | Alaska | Boil water order | 1 violation |
| Dec 3, 2024 | Alaska | Boil water order | 1 violation |
| Aug 25, 2023 | Alaska | Boil water order | 1 violation |
| Jun 27, 2023 | Alaska | Boil water order | 1 violation |
| Dec 24, 2022 | Alaska | Boil water order | 1 violation |
| Jul 12, 2022 | Alaska | Boil water order | 1 violation |
| Feb 14, 2022 | Alaska | Boil water order | 1 violation |
| Oct 26, 2020 | Alaska | Boil water order | 1 violation |
| May 27, 2020 | Alaska | Boil water order | 1 violation |
| Apr 15, 2020 | Alaska | Boil water order | 1 violation |
| Apr 30, 2019 | Alaska | Boil water order | 1 violation |
| Mar 23, 2016 | Alaska | Boil water order | 1 violation |
| Jul 9, 2010 | Alaska | Compliance order (no penalty) | 4 violations: Lead and Copper Rule |
What the violations mean
Groundwater Rule
10 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
Koliganek Water System draws water from 2 wells. 1 smaller public system such as schools, businesses or campgrounds buys water from Koliganek Water System.
Annual water quality report
Koliganek 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 Koliganek 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