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Community Water System · PWS AZ0415029

Cs Harrisburg Utility Company

Des Peres, Arizona 63131 - drinking water served from groundwater sources to 1,759 people, tracked in EPA SDWIS and UCMR5.

1,759
People served
143
EPA violations
2
Health-based
Untested
UCMR5 result

The verdict

EPA records 143 drinking-water violations at Cs Harrisburg Utility Company, 1% of them health-based - below the Arizona per-system average.

143
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
1,759
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cs Harrisburg Utility Company

Cs Harrisburg Utility Company is a private-owned community water system that delivers drinking water to 1,759 residents in Des Peres, Arizona (La Paz County) through 687 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 143 total violations for this system , of which 2 (1%) 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 2025.

The most frequently cited contaminant at this system is Chlorine, recorded in 19 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%).

Cs Harrisburg Utility Company's 143 violations sit below 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
1,759
Total Violations
143
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
687
County
La Paz
School/Daycare
No
MCL Violations
0
Monitoring Violations
119
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 19 2023
Consumer Confidence Rule Other 9 2013
Lead and Copper Rule MR 6 2023
Total Haloacetic Acids (HAA5) MR 4 2016
TTHM MR 4 2016
Fluoride MR 3 1998
Mercury MR 3 1998
Coliform (TCR) MR 3 2002
Arsenic MR 3 1998
Chromium MR 3 1998
Cadmium MR 3 1998
Selenium MR 3 1998
Barium MR 3 1998
Public Notice Other 2 2024
Revised Total Coliform Rule MON 2 2016
Groundwater Rule TT 2 2025
Gross Alpha, Excl. Radon and U MR 2 1990
Nitrate MR 2 1989
Revised Total Coliform Rule RPT 2 2022
Antimony, Total MR 1 1998
Thallium, Total MR 1 1998
1,2,4-Trichlorobenzene MR 1 1998
Xylenes, Total MR 1 1998
DICHLOROMETHANE MR 1 1998
p-Dichlorobenzene MR 1 1998
trans-1,2-Dichloroethylene MR 1 1998
1,1,1-Trichloroethane MR 1 1998
1,2-Dichloropropane MR 1 1998
Trichloroethylene MR 1 1998
1,1,2-Trichloroethane MR 1 1998

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 Cs Harrisburg Utility 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 AZ0415029 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 Cs Harrisburg Utility 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 Groundwater Rule TT 2 SDWIS / AZ0415029 / 0700
2024 Public Notice Other 2 SDWIS / AZ0415029 / 7500
2023 Chlorine MR 19 SDWIS / AZ0415029 / 0999
2023 Lead and Copper Rule MR 6 SDWIS / AZ0415029 / 5000
2022 Revised Total Coliform Rule RPT 2 SDWIS / AZ0415029 / 8000
2016 Total Haloacetic Acids (HAA5) MR 4 SDWIS / AZ0415029 / 2456
2016 TTHM MR 4 SDWIS / AZ0415029 / 2950
2016 Revised Total Coliform Rule MON 2 SDWIS / AZ0415029 / 8000
2013 Consumer Confidence Rule Other 9 SDWIS / AZ0415029 / 7000
2002 Coliform (TCR) MR 3 SDWIS / AZ0415029 / 3100
1998 Fluoride MR 3 SDWIS / AZ0415029 / 1025
1998 Mercury MR 3 SDWIS / AZ0415029 / 1035
1998 Arsenic MR 3 SDWIS / AZ0415029 / 1005
1998 Chromium MR 3 SDWIS / AZ0415029 / 1020
1998 Cadmium MR 3 SDWIS / AZ0415029 / 1015

How Cs Harrisburg Utility Company Compares

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

Metric Cs Harrisburg Utility Company Arizona avg Federal benchmark
Total violations 143 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 2 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 1,759 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 Cs Harrisburg Utility Company water safe to drink? ▼
Cs Harrisburg Utility Company (PWS ID: AZ0415029) has 143 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,759 people using Groundwater sources.
How many people does Cs Harrisburg Utility Company serve? ▼
Cs Harrisburg Utility Company serves 1,759 people in Des Peres, Arizona. It is a Private-owned system using Groundwater water sources with 687 service connections.
What type of violations does Cs Harrisburg Utility Company have? ▼
Cs Harrisburg Utility Company has 143 total violations: 2 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 Cs Harrisburg Utility Company water? ▼
No PFAS testing data is available for Cs Harrisburg Utility Company under the EPA's UCMR5 monitoring program.
What water source does Cs Harrisburg Utility Company use? ▼
Cs Harrisburg Utility 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.
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.