Question 1

Is Humboldt Water System water safe to drink?

Accepted Answer

Humboldt Water System (PWS ID: AZ0413052) has 239 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 825 people using Groundwater sources.

Question 2

How many people does Humboldt Water System serve?

Accepted Answer

EPA SDWIS reports that Humboldt Water System serves 825 people (this public water system's service population, not the municipal population of Mayer or any other city). It is a Private-owned system using Groundwater water sources with 414 service connections. The operator address is listed in Mayer, Arizona.

Question 3

What type of violations does Humboldt Water System have?

Accepted Answer

Humboldt Water System has 239 total violations: 34 health-based violations (MCL exceedances or treatment failures), 192 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 Humboldt Water System water?

Accepted Answer

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

Question 5

What water source does Humboldt Water System use?

Accepted Answer

Humboldt Water System 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 Humboldt Water System sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Humboldt Water System ranks #22,066 of 29,740 by people served, and #303 of 413 in Arizona. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Humboldt Water System's violation count compare nationally?

Accepted Answer

Humboldt Water System has 239 recorded EPA SDWIS violations, fewer than 12% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 88% of that cohort has fewer violations than Humboldt Water System. 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
Nitrate	MR	81	2014
Arsenic	MCL	30	2015
Chlorine	MR	13	2013
Consumer Confidence Rule	Other	9	2017
Lead and Copper Rule	MR	8	2008
Coliform (TCR)	MR	4	2004
Nitrate	MCL	4	2012
Fluoride	MR	3	1992
DICHLOROMETHANE	MR	2	1998
o-Dichlorobenzene	MR	2	1998
p-Dichlorobenzene	MR	2	1998
trans-1,2-Dichloroethylene	MR	2	1998
1,1,1-Trichloroethane	MR	2	1998
Carbon tetrachloride	MR	2	1998
1,1,2-Trichloroethane	MR	2	1998
Tetrachloroethylene	MR	2	1998
Ethylbenzene	MR	2	1998
TTHM	MR	2	2004
Total Haloacetic Acids (HAA5)	MR	2	2004
Selenium	MR	2	1989
1,1-Dichloroethylene	MR	2	1998
Barium	MR	2	1989
Cadmium	MR	2	1989
Chromium	MR	2	1989
Trichloroethylene	MR	2	1998
Mercury	MR	2	1989
Arsenic	MR	2	1989
Toluene	MR	2	1998
Styrene	MR	2	1998
1,2-Dichloroethane	MR	2	1998

Humboldt Water System

Humboldt Water System standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Humboldt Water System

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints