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Community Water System · PWS AZ0402052

Mescal Lakes Water System

Glendale, Arizona 85307 - drinking water served from groundwater sources to 1,390 people, tracked in EPA SDWIS and UCMR5.

1,390
People served
160
EPA violations
8
Health-based
Untested
UCMR5 result

The verdict

EPA records 160 drinking-water violations at Mescal Lakes Water System, 5% of them health-based - above the Arizona per-system average.

160
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
1,390
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mescal Lakes Water System

Mescal Lakes Water System is a private-owned community water system that delivers drinking water to 1,390 residents in Glendale, Arizona (Cochise County) through 556 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 160 total violations for this system , of which 8 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 119 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Chlorine, recorded in 18 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%).

Mescal Lakes Water System's 160 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
1,390
Total Violations
160
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
556
County
Cochise
School/Daycare
No
MCL Violations
6
Monitoring Violations
119
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 18 2022
Coliform (TCR) MR 11 2012
Consumer Confidence Rule Other 6 2009
Total Haloacetic Acids (HAA5) MR 6 2023
TTHM MR 6 2023
Coliform (TCR) MCL 5 2008
Barium MR 3 1992
Cadmium MR 3 1992
Chromium MR 3 1992
Fluoride MR 3 1992
Mercury MR 3 1992
Selenium MR 3 1992
Arsenic MR 3 1992
Nitrate MR 2 1989
cis-1,2-Dichloroethylene MR 2 2004
DICHLOROMETHANE MR 2 2004
p-Dichlorobenzene MR 2 2004
1,1-Dichloroethylene MR 2 2004
trans-1,2-Dichloroethylene MR 2 2004
1,1,1-Trichloroethane MR 2 2004
Carbon tetrachloride MR 2 2004
1,2-Dichloropropane MR 2 2004
1,1,2-Trichloroethane MR 2 2004
Tetrachloroethylene MR 2 2004
Toluene MR 2 2004
Ethylbenzene MR 2 2004
Styrene MR 2 2004
1,2,4-Trichlorobenzene MR 2 2004
Xylenes, Total MR 2 2004
Trichloroethylene MR 2 2004

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 Mescal Lakes Water System.

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 AZ0402052 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 Mescal Lakes Water System 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
2023 Total Haloacetic Acids (HAA5) MR 6 SDWIS / AZ0402052 / 2456
2023 TTHM MR 6 SDWIS / AZ0402052 / 2950
2022 Chlorine MR 18 SDWIS / AZ0402052 / 0999
2022 Revised Total Coliform Rule RPT 2 SDWIS / AZ0402052 / 8000
2019 E. COLI MR 2 SDWIS / AZ0402052 / 3014
2019 Lead and Copper Rule MR 2 SDWIS / AZ0402052 / 5000
2019 Revised Total Coliform Rule TT 2 SDWIS / AZ0402052 / 8000
2012 Coliform (TCR) MR 11 SDWIS / AZ0402052 / 3100
2009 Consumer Confidence Rule Other 6 SDWIS / AZ0402052 / 7000
2008 Coliform (TCR) MCL 5 SDWIS / AZ0402052 / 3100
2004 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0402052 / 2380
2004 DICHLOROMETHANE MR 2 SDWIS / AZ0402052 / 2964
2004 p-Dichlorobenzene MR 2 SDWIS / AZ0402052 / 2969
2004 1,1-Dichloroethylene MR 2 SDWIS / AZ0402052 / 2977
2004 trans-1,2-Dichloroethylene MR 2 SDWIS / AZ0402052 / 2979

How Mescal Lakes Water System Compares

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

Metric Mescal Lakes Water System Arizona avg Federal benchmark
Total violations 160 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 8 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 1,390 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 Mescal Lakes Water System water safe to drink? ▼
Mescal Lakes Water System (PWS ID: AZ0402052) has 160 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,390 people using Groundwater sources.
How many people does Mescal Lakes Water System serve? ▼
Mescal Lakes Water System serves 1,390 people in Glendale, Arizona. It is a Private-owned system using Groundwater water sources with 556 service connections.
What type of violations does Mescal Lakes Water System have? ▼
Mescal Lakes Water System has 160 total violations: 8 health-based violations (MCL exceedances or treatment failures), 119 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mescal Lakes Water System water? ▼
No PFAS testing data is available for Mescal Lakes Water System under the EPA's UCMR5 monitoring program.
What water source does Mescal Lakes Water System use? ▼
Mescal Lakes Water System uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.