Question 1

Is Rough Rock Demonstration School BIA water safe to drink?

Accepted Answer

Rough Rock Demonstration School BIA (PWS ID: NN0435112) has 181 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 200 people using Groundwater sources.

Question 2

How many people does Rough Rock Demonstration School BIA serve?

Accepted Answer

EPA SDWIS reports that Rough Rock Demonstration School BIA serves 200 people (this public water system's service population, not the municipal population of Chinle or any other city). It is a Federal-owned system using Groundwater water sources with 49 service connections. The operator address is listed in Chinle, Navajo Nation.

Question 3

What type of violations does Rough Rock Demonstration School BIA have?

Accepted Answer

Rough Rock Demonstration School BIA has 181 total violations: 14 health-based violations (MCL exceedances or treatment failures), 136 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Rough Rock Demonstration School BIA water?

Accepted Answer

No PFAS testing data is available for Rough Rock Demonstration School BIA under the EPA's UCMR5 monitoring program.

Question 5

What water source does Rough Rock Demonstration School BIA use?

Accepted Answer

Rough Rock Demonstration School BIA uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Question 7

How does Rough Rock Demonstration School BIA's violation count compare nationally?

Accepted Answer

Rough Rock Demonstration School BIA has 181 recorded EPA SDWIS violations, fewer than 16% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 84% of that cohort has fewer violations than Rough Rock Demonstration School BIA. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

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

Rough Rock Demonstration School BIA

Rough Rock Demonstration School BIA standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Rough Rock Demonstration School BIA

Nationwide peers

Cross-state systems with comparable violation load