Question 1

Is Shungopavi water safe to drink?

Accepted Answer

Shungopavi (PWS ID: 090400259) has 494 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,756 people using Groundwater sources.

Question 2

How many people does Shungopavi serve?

Accepted Answer

EPA SDWIS reports that Shungopavi serves 1,756 people (this public water system's service population, not the municipal population of Second Mesa or any other city). It is a Native American-owned system using Groundwater water sources with 199 service connections. The operator address is listed in Second Mesa, EPA Region 9 — Tribal Water Systems.

Question 3

What type of violations does Shungopavi have?

Accepted Answer

Shungopavi has 494 total violations: 96 health-based violations (MCL exceedances or treatment failures), 307 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Shungopavi water?

Accepted Answer

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

Question 5

What water source does Shungopavi use?

Accepted Answer

Shungopavi 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 Shungopavi sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Shungopavi ranks #14,665 of 29,740 by people served, and #67 of 129 in EPA Region 9 — Tribal Water Systems. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Shungopavi's violation count compare nationally?

Accepted Answer

Shungopavi has 494 recorded EPA SDWIS violations, fewer than 5% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 95% of that cohort has fewer violations than Shungopavi. 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	92	2023
Coliform (TCR)	MR	52	2014
Arsenic	MR	19	2023
Public Notice	Other	9	2016
Nitrate	MR	7	2023
Chlorine	MR	6	2023
Total Haloacetic Acids (HAA5)	MR	5	2022
Revised Total Coliform Rule	MON	5	2025
BHC-GAMMA	MR	4	2011
Methoxychlor	MR	4	2011
Toxaphene	MR	4	2011
Carbofuran	MR	4	2011
Atrazine	MR	4	2011
LASSO	MR	4	2011
Heptachlor	MR	4	2011
Heptachlor epoxide	MR	4	2011
2,4-D	MR	4	2011
2,4,5-TP	MR	4	2011
Benzo(a)pyrene	MR	4	2017
Pentachlorophenol	MR	4	2011
1,2,4-Trichlorobenzene	MR	4	2011
cis-1,2-Dichloroethylene	MR	4	2011
Total Polychlorinated Biphenyls (PCB)	MR	4	2011
1,2-DIBROMO-3-CHLOROPROPANE	MR	4	2011
ETHYLENE DIBROMIDE	MR	4	2011
Xylenes, Total	MR	4	2011
Chlordane	MR	4	2011
DICHLOROMETHANE	MR	4	2011
o-Dichlorobenzene	MR	4	2011
p-Dichlorobenzene	MR	4	2011

Shungopavi

Shungopavi standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Shungopavi

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served