PlainWater
States → Navajo Nation

Naschitti-Bisola NTUA

PWS ID: NN3500268 · Ft Defiance, Navajo Nation 86504

Population Served
1,173
Total Violations
105
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Native American
Connections
343
School/Daycare
No
MCL Violations
0
Monitoring Violations
96
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 3 2012
Total Haloacetic Acids (HAA5) MR 3 2020
TTHM MR 3 2020
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 3 2013
cis-1,2-Dichloroethylene MR 2 2008
Xylenes, Total MR 2 2008
o-Dichlorobenzene MR 2 2008
p-Dichlorobenzene MR 2 2008
Vinyl chloride MR 2 2008
1,1-Dichloroethylene MR 2 2008
trans-1,2-Dichloroethylene MR 2 2008
1,1,1-Trichloroethane MR 2 2008
Carbon tetrachloride MR 2 2008
1,1,2-Trichloroethane MR 2 2008
Tetrachloroethylene MR 2 2008
CHLOROBENZENE MR 2 2008
Benzene MR 2 2008
Toluene MR 2 2008
Styrene MR 2 2008
1,2,4-Trichlorobenzene MR 2 2008
DICHLOROMETHANE MR 2 2008
Trichloroethylene MR 2 2008
1,2-Dichloroethane MR 2 2008
Ethylbenzene MR 2 2008
Revised Total Coliform Rule Other 2 2016
1,2-Dichloropropane MR 2 2008
Cadmium MR 1 2008
Chromium MR 1 2008
CYANIDE MR 1 2008
Mercury MR 1 2008
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.