PlainWater
States → Arizona

MESALAND WATER COMPANY

PWS ID: AZ0410074 · TUCSON, Arizona 85704

MESALAND WATER COMPANY serves 294 people in TUCSON, Arizona using Groundwater water sources. It has 114 recorded EPA violations, including 0 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: MESALAND WATER COMPANY

MESALAND WATER COMPANY is a private-owned community water system that delivers drinking water to 294 residents in TUCSON, Arizona (Pima County) through 100 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 114 total violations for this system , of which 0 (0%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 77 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Consumer Confidence Rule, recorded in 34 violations (Other). 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. MESALAND WATER COMPANY's 114 violations sit below the Arizona average. Statewide, 145 of 152 UCMR5-tested systems have reported PFAS detections (95.4%). 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
294
Total Violations
114
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
100
County
Pima
School/Daycare
No
MCL Violations
0
Monitoring Violations
77
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Consumer Confidence Rule Other 34 2021
Coliform (TCR) MR 7 2013
Nitrate MR 4 1999
Revised Total Coliform Rule MON 4 2024
Lead and Copper Rule MR 3 2025
Arsenic MR 3 1988
DICHLOROMETHANE MR 2 1999
o-Dichlorobenzene MR 2 1999
1,2-Dichloroethane MR 2 1999
1,2-Dichloropropane MR 2 1999
1,1,2-Trichloroethane MR 2 1999
Tetrachloroethylene MR 2 1999
Toluene MR 2 1999
Ethylbenzene MR 2 1999
Styrene MR 2 1999
1,2,4-Trichlorobenzene MR 2 1999
cis-1,2-Dichloroethylene MR 2 1999
trans-1,2-Dichloroethylene MR 2 1999
CHLOROBENZENE MR 2 1999
Benzene MR 2 1999
E. COLI MR 2 2018
Selenium MR 2 1988
Cadmium MR 2 1988
Mercury MR 2 1988
Fluoride MR 2 1988
p-Dichlorobenzene MR 2 1999
Gross Alpha, Excl. Radon and U MR 2 1986
Xylenes, Total MR 2 1999
Carbon tetrachloride MR 2 1999
1,1,1-Trichloroethane MR 2 1999

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 MESALAND WATER COMPANY.

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 AZ0410074 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 MESALAND WATER COMPANY 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
2025 Lead and Copper Rule MR 3 SDWIS / AZ0410074 / 5000
2025 Public Notice Other 1 SDWIS / AZ0410074 / 7500
2024 Revised Total Coliform Rule MON 4 SDWIS / AZ0410074 / 8000
2022 Revised Total Coliform Rule RPT 1 SDWIS / AZ0410074 / 8000
2021 Consumer Confidence Rule Other 34 SDWIS / AZ0410074 / 7000
2018 E. COLI MR 2 SDWIS / AZ0410074 / 3014
2013 Coliform (TCR) MR 7 SDWIS / AZ0410074 / 3100
1999 Nitrate MR 4 SDWIS / AZ0410074 / 1040
1999 DICHLOROMETHANE MR 2 SDWIS / AZ0410074 / 2964
1999 o-Dichlorobenzene MR 2 SDWIS / AZ0410074 / 2968
1999 1,2-Dichloroethane MR 2 SDWIS / AZ0410074 / 2980
1999 1,2-Dichloropropane MR 2 SDWIS / AZ0410074 / 2983
1999 1,1,2-Trichloroethane MR 2 SDWIS / AZ0410074 / 2985
1999 Tetrachloroethylene MR 2 SDWIS / AZ0410074 / 2987
1999 Toluene MR 2 SDWIS / AZ0410074 / 2991

How MESALAND WATER COMPANY Compares

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

Metric MESALAND WATER COMPANY Arizona avg Federal benchmark
Total violations 114 153.3 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 0 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 294 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is MESALAND WATER COMPANY water safe to drink? ▼
MESALAND WATER COMPANY (PWS ID: AZ0410074) has 114 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 294 people using Groundwater sources.
How many people does MESALAND WATER COMPANY serve? ▼
MESALAND WATER COMPANY serves 294 people in TUCSON, Arizona. It is a Private-owned system using Groundwater water sources with 100 service connections.
What type of violations does MESALAND WATER COMPANY have? ▼
MESALAND WATER COMPANY has 114 total violations: 0 health-based violations (MCL exceedances or treatment failures), 77 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in MESALAND WATER COMPANY water? ▼
No PFAS testing data is available for MESALAND WATER COMPANY under the EPA's UCMR5 monitoring program.
What water source does MESALAND WATER COMPANY use? ▼
MESALAND WATER COMPANY 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.

Explore PlainWater

Water in Arizona

All systems in state
All States

Water quality by state
Contaminants

PFAS & other pollutants
Guides

Understanding water quality

Related Data for Arizona

Environmental Data → Natural Hazards → Air Quality → Healthcare Access → Climate Data →
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.

Related

Browse all → | Rankings →
Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by Kiznis Studio Editorial