Question 1

Is Hard Rock NTUA water safe to drink?

Accepted Answer

Hard Rock NTUA (PWS ID: NN0403811) has 74 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 982 people using Groundwater sources.

Question 2

How many people does Hard Rock NTUA serve?

Accepted Answer

EPA SDWIS reports that Hard Rock NTUA serves 982 people (this public water system's service population, not the municipal population of Ft Defiance or any other city). It is a Native American-owned system using Groundwater water sources with 287 service connections. The operator address is listed in Ft Defiance, Navajo Nation.

Question 3

What type of violations does Hard Rock NTUA have?

Accepted Answer

Hard Rock NTUA has 74 total violations: 3 health-based violations (MCL exceedances or treatment failures), 66 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 Hard Rock NTUA water?

Accepted Answer

No PFAS testing data is available for Hard Rock NTUA under the EPA's UCMR5 monitoring program.

Question 5

What water source does Hard Rock NTUA use?

Accepted Answer

Hard Rock NTUA 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

Where does Hard Rock NTUA sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Hard Rock NTUA ranks #20,015 of 29,740 by people served, and #47 of 82 in Navajo Nation. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Hard Rock NTUA's violation count compare nationally?

Accepted Answer

Hard Rock NTUA has 74 recorded EPA SDWIS violations, fewer than 33% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 66% of that cohort has fewer violations than Hard Rock NTUA. 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
Coliform (TCR)	MCL	3	2003
Total Haloacetic Acids (HAA5)	MR	3	2020
TTHM	MR	3	2020
Stage 2 Disinfectants and Disinfection Byproducts Rule	MR	3	2013
1,2,4-Trichlorobenzene	MR	2	2008
Xylenes, Total	MR	2	2008
o-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
1,2-Dichloropropane	MR	2	2008
Trichloroethylene	MR	2	2008
1,1,2-Trichloroethane	MR	2	2008
Tetrachloroethylene	MR	2	2008
CHLOROBENZENE	MR	2	2008
Toluene	MR	2	2008
Ethylbenzene	MR	2	2008
Styrene	MR	2	2008
Coliform (TCR)	MR	2	2012
cis-1,2-Dichloroethylene	MR	2	2008
DICHLOROMETHANE	MR	2	2008
p-Dichlorobenzene	MR	2	2008
Benzene	MR	2	2008
1,2-Dichloroethane	MR	2	2008
Barium	MR	1	2008
CYANIDE	MR	1	2008
Fluoride	MR	1	2008
Mercury	MR	1	2008

Hard Rock NTUA

Hard Rock NTUA standing, mid SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Hard Rock NTUA

Nationwide peers

Cross-state systems near this violation count

Cross-state systems with smaller service footprints