THORNE BAY, CITY OF Water Quality Report
Population
470
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 122
violations recorded
C
Fair
Safety Grade
122 violations in the past 5 years, including 106 health-based
System Details
- PWSID
- AK2120216
- Population Served
- 470
- Water Source
- Surface Water
- Owner
- Native American
- State
- Alaska
- EPA Region
- 10
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 0200 | ✕ Health-Based | 23 |
| Contaminant 5000 | ⚠ Monitoring/Reporting | 15 |
| Contaminant 0300 | ⚠ Monitoring/Reporting | 42 |
| Total Trihalomethanes (TTHMs) | ✕ Health-Based | 68 |
| Haloacetic Acids (HAA5) | ✕ Health-Based | 67 |
| Contaminant 3100 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 0999 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 2378 | ⚠ Monitoring/Reporting | 7 |
| Vinyl Chloride | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2955 | ⚠ Monitoring/Reporting | 7 |
| Trichloroethylene (TCE) | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2968 | ⚠ Monitoring/Reporting | 7 |
| Tetrachloroethylene (PCE) | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2976 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2977 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2979 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2980 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2981 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2982 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2983 | ⚠ Monitoring/Reporting | 7 |
| Chloramine | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2985 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2987 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2989 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2990 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2991 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2992 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 2996 | ⚠ Monitoring/Reporting | 7 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 3 |
| Nitrate | ⚠ Monitoring/Reporting | 4 |
| Total Coliform | ⚠ Monitoring/Reporting | 2 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 1 |
Violation History
2025
16
2024
20
2023
74
2022
10
2021
2
2020
38
2019
32
2018
12
2017
34
2016
13
Total violations on record: 375
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: Nitrate
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Trichloroethylene (TCE), Tetrachloroethylene (PCE), Vinyl Chloride
UV Water Purifier
Kills bacteria and viruses without chemicals
Removes: Total Coliform
How does this compare?
This systemNational average
Grade C
Avg: B-C
375violations total
1339% of national average
National avg: ~28 per system
🏘️ Small community water system.