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Non-Transient Non-Community Water System · PWS AZ0413116

Mingus Union High School

Cottonwood, Arizona 86326 - drinking water served from groundwater sources to 1,200 people, tracked in EPA SDWIS and UCMR5.

1,200
People served
452
EPA violations
29
Health-based
Untested
UCMR5 result

The verdict

EPA records 452 drinking-water violations at Mingus Union High School, 6% of them health-based - above the Arizona per-system average.

452
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
1,200
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mingus Union High School

Mingus Union High School is a local-owned non-transient non-community water system that delivers drinking water to 1,200 residents in Cottonwood, Arizona (Yavapai County) through 7 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 452 total violations for this system , of which 29 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 411 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Tetrachloroethylene, recorded in 17 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Arizona, EPA tracks 1,493 public water systems serving 7,322,166 people, with 228,944 cumulative violations and 15,663 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 153.3 violations. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%).

Mingus Union High School's 452 violations sit above the Arizona average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,200
Total Violations
452
Health-Based Violations
29
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
7
County
Yavapai
School/Daycare
Yes
MCL Violations
22
Monitoring Violations
411
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Tetrachloroethylene MR 17 2014
Toluene MR 17 2014
Ethylbenzene MR 17 2014
Styrene MR 17 2014
cis-1,2-Dichloroethylene MR 17 2014
1,1-Dichloroethylene MR 17 2014
trans-1,2-Dichloroethylene MR 17 2014
1,2-Dichloroethane MR 17 2014
Carbon tetrachloride MR 17 2014
1,2-Dichloropropane MR 17 2014
Trichloroethylene MR 17 2014
1,1,2-Trichloroethane MR 17 2014
CHLOROBENZENE MR 17 2014
Xylenes, Total MR 17 2014
DICHLOROMETHANE MR 17 2014
Benzene MR 17 2014
p-Dichlorobenzene MR 17 2014
o-Dichlorobenzene MR 17 2014
1,1,1-Trichloroethane MR 17 2014
1,2,4-Trichlorobenzene MR 16 2014
Coliform (TCR) MCL 12 2009
Arsenic MR 12 2009
Coliform (TCR) MR 11 2012
Arsenic MCL 10 2009
Vinyl chloride MR 9 2014
Revised Total Coliform Rule TT 7 2024
Chromium MR 4 2015
Mercury MR 4 2015
Public Notice Other 4 2024
Barium MR 4 2015

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Mingus Union High School.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID AZ0413116 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Arizona Drinking Water Authority

Arizona DEQ, Drinking Water Program is the primacy agency that licenses and inspects Mingus Union High School under EPA-delegated authority.

Open AZ regulator portal

Source: Arizona DEQ, Drinking Water Program

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule TT 7 SDWIS / AZ0413116 / 8000
2024 Public Notice Other 4 SDWIS / AZ0413116 / 7500
2021 Revised Total Coliform Rule RPT 3 SDWIS / AZ0413116 / 8000
2015 Chromium MR 4 SDWIS / AZ0413116 / 1020
2015 Mercury MR 4 SDWIS / AZ0413116 / 1035
2015 Barium MR 4 SDWIS / AZ0413116 / 1010
2015 Selenium MR 4 SDWIS / AZ0413116 / 1045
2015 Cadmium MR 4 SDWIS / AZ0413116 / 1015
2015 Antimony, Total MR 3 SDWIS / AZ0413116 / 1074
2015 Thallium, Total MR 3 SDWIS / AZ0413116 / 1085
2015 Beryllium, Total MR 3 SDWIS / AZ0413116 / 1075
2015 Nickel MR 3 SDWIS / AZ0413116 / 1036
2015 CYANIDE MR 3 SDWIS / AZ0413116 / 1024
2014 Tetrachloroethylene MR 17 SDWIS / AZ0413116 / 2987
2014 Toluene MR 17 SDWIS / AZ0413116 / 2991

How Mingus Union High School Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Mingus Union High School Arizona avg Federal benchmark
Total violations 452 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 29 10.5 Indicates a contaminant exceeded a federal MCL
PFAS detection None 95.4% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,200 4,904 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,493 regulated public water systems in Arizona.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Mingus Union High School water safe to drink? ▼
Mingus Union High School (PWS ID: AZ0413116) has 452 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,200 people using Groundwater sources.
How many people does Mingus Union High School serve? ▼
Mingus Union High School serves 1,200 people in Cottonwood, Arizona. It is a Local-owned system using Groundwater water sources with 7 service connections.
What type of violations does Mingus Union High School have? ▼
Mingus Union High School has 452 total violations: 29 health-based violations (MCL exceedances or treatment failures), 411 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mingus Union High School water? ▼
No PFAS testing data is available for Mingus Union High School under the EPA's UCMR5 monitoring program.
What water source does Mingus Union High School use? ▼
Mingus Union High School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
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.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.