PlainWater

KOYUK PUBLIC WATER SYSTEM

PWS ID: AK2340167 · KOYUK, Alaska 99753

Population Served
277
Total Violations
918
Health-Based Violations
38
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Native American
Connections
82
County
Nome Census Area
School/Daycare
No
MCL Violations
9
Monitoring Violations
697
Treatment Tech Violations
29

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule MR 71 2025
Coliform (TCR) MR 29 2015
Surface Water Treatment Rule TT 26 2024
Revised Total Coliform Rule MON 26 2025
Consumer Confidence Rule Other 23 2023
Chlorine MR 21 2025
Nitrate MR 16 2022
Interim Enhanced Surface Water Treatment Rule MR 16 2024
Total Polychlorinated Biphenyls (PCB) MR 12 1998
Pentachlorophenol MR 12 1998
Heptachlor epoxide MR 12 1998
Heptachlor MR 12 1998
2,4-D MR 12 1998
Toxaphene MR 12 1998
BHC-GAMMA MR 12 1998
Methoxychlor MR 12 1998
Chlordane MR 12 1998
Atrazine MR 12 1998
2,4,5-TP MR 12 1998
p-Dichlorobenzene MR 11 2022
o-Dichlorobenzene MR 11 2022
Tetrachloroethylene MR 11 2022
Carbon tetrachloride MR 11 2022
CHLOROBENZENE MR 11 2022
Toluene MR 11 2022
Styrene MR 11 2022
Ethylbenzene MR 11 2022
1,2-Dichloropropane MR 11 2022
cis-1,2-Dichloroethylene MR 11 2022
trans-1,2-Dichloroethylene MR 11 2022
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.