KOLIGANEK WATER SYSTEM Water Quality Report
Population
170
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 13
violations recorded
C
Fair
Safety Grade
13 violations in the past 5 years, including 12 health-based
System Details
- PWSID
- AK2260040
- Population Served
- 170
- Water Source
- Ground Water
- Owner
- Native American
- State
- Alaska
- EPA Region
- 10
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ⚠ Monitoring/Reporting | 14 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 6 |
| Contaminant 0700 | ✕ Health-Based | 12 |
| Nitrate | ⚠ Monitoring/Reporting | 9 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 6 |
| Arsenic | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2378 | ⚠ Monitoring/Reporting | 1 |
| Vinyl Chloride | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2955 | ⚠ Monitoring/Reporting | 1 |
| Trichloroethylene (TCE) | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2968 | ⚠ Monitoring/Reporting | 1 |
| Tetrachloroethylene (PCE) | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2976 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2977 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2979 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2980 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2981 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2982 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2983 | ⚠ Monitoring/Reporting | 1 |
| Chloramine | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2985 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2987 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2989 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2990 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2991 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2992 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 2996 | ⚠ Monitoring/Reporting | 1 |
| Radium-226 | ⚠ Monitoring/Reporting | 1 |
| Gross Alpha | ⚠ Monitoring/Reporting | 1 |
| Uranium | ⚠ Monitoring/Reporting | 1 |
| Contaminant 3100 | ⚠ Monitoring/Reporting | 1 |
| Beryllium | ⚠ Monitoring/Reporting | 1 |
Violation History
2024
6
2023
3
2022
3
2021
1
2020
1
2019
2
2018
9
2017
3
2016
2
2015
1
Total violations on record: 75
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Reverse Osmosis System
Removes up to 99% of contaminants including PFAS, lead, arsenic, and nitrates
Removes: Arsenic, Nitrate, Uranium, Radium-226
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Trichloroethylene (TCE), Tetrachloroethylene (PCE), Vinyl Chloride
Water Distiller
Removes heavy metals, minerals, and most contaminants through evaporation
Removes: Arsenic
How does this compare?
This systemNational average
Grade C
Avg: B-C
75violations total
268% of national average
National avg: ~28 per system
🏘️ Small community water system.