PlainWater
States → Navajo Nation

Rough Rock Demonstration School BIA

PWS ID: NN0435112 · Chinle, Navajo Nation 86503

Population Served
200
Total Violations
181
Health-Based Violations
14
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Federal
Connections
49
School/Daycare
Yes
MCL Violations
14
Monitoring Violations
136
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 11 2010
Coliform (TCR) MR 6 2012
Arsenic MR 5 2006
Revised Total Coliform Rule RPT 5 2025
Stage 2 Disinfectants and Disinfection Byproducts Rule MR 4 2013
Revised Total Coliform Rule Other 4 2016
Consumer Confidence Rule Other 4 2006
Coliform (TCR) MCL 3 2010
Dalapon MR 2 2008
Diquat MR 2 2008
Endothall MR 2 2008
Di(2-ethylhexyl) adipate MR 2 2008
OXAMYL MR 2 2008
Simazine MR 2 2008
Di(2-ethylhexyl) phthalate MR 2 2008
Picloram MR 2 2008
Dinoseb MR 2 2008
Hexachlorocyclopentadiene MR 2 2008
Carbofuran MR 2 2008
Atrazine MR 2 2008
LASSO MR 2 2008
2,3,7,8-TCDD MR 2 2008
Heptachlor MR 2 2008
Heptachlor epoxide MR 2 2008
2,4-D MR 2 2008
2,4,5-TP MR 2 2008
HEXACHLOROBENZENE MR 2 2008
Benzo(a)pyrene MR 2 2008
Pentachlorophenol MR 2 2008
1,2,4-Trichlorobenzene MR 2 2008
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.