PlainWater
States → Navajo Nation

Coyote Canyon-Bass Lake NTUA

PWS ID: NN3500274 · Ft Defiance, Navajo Nation 86504

Population Served
622
Total Violations
73
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
182
School/Daycare
No
MCL Violations
0
Monitoring Violations
60
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Total Haloacetic Acids (HAA5) MR 6 2020
TTHM MR 6 2020
Coliform (TCR) MR 3 2012
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 3 2013
1,2,4-Trichlorobenzene MR 2 2005
cis-1,2-Dichloroethylene MR 2 2005
Xylenes, Total MR 2 2005
DICHLOROMETHANE MR 2 2005
o-Dichlorobenzene MR 2 2005
Vinyl chloride MR 2 2005
1,1-Dichloroethylene MR 2 2005
trans-1,2-Dichloroethylene MR 2 2005
1,2-Dichloroethane MR 2 2005
1,1,1-Trichloroethane MR 2 2005
Carbon tetrachloride MR 2 2005
1,2-Dichloropropane MR 2 2005
Trichloroethylene MR 2 2005
1,1,2-Trichloroethane MR 2 2005
Tetrachloroethylene MR 2 2005
Toluene MR 2 2005
Styrene MR 2 2005
p-Dichlorobenzene MR 2 2005
Benzene MR 2 2005
CHLOROBENZENE MR 2 2005
Revised Total Coliform Rule Other 2 2016
Ethylbenzene MR 2 2005
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.