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Community Water System · PWS AZ0408078

Walnut Creek Water Company

Glendale, Arizona 85307 - drinking water served from groundwater sources to 728 people, tracked in EPA SDWIS and UCMR5.

728
People served
90
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 90 drinking-water violations at Walnut Creek Water Company - below the Arizona per-system average.

90
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
728
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Walnut Creek Water Company

Walnut Creek Water Company is a public/private-owned community water system that delivers drinking water to 728 residents in Glendale, Arizona (Mohave County) through 291 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 90 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 84 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 14 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%).

Walnut Creek Water Company's 90 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
728
Total Violations
90
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
291
County
Mohave
School/Daycare
No
MCL Violations
0
Monitoring Violations
84
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 14 2016
Lead and Copper Rule MR 11 2022
Revised Total Coliform Rule RPT 4 2022
cis-1,2-Dichloroethylene MR 2 2006
o-Dichlorobenzene MR 2 2006
p-Dichlorobenzene MR 2 2006
1,1-Dichloroethylene MR 2 2006
trans-1,2-Dichloroethylene MR 2 2006
1,2-Dichloroethane MR 2 2006
1,1,1-Trichloroethane MR 2 2006
1,2-Dichloropropane MR 2 2006
1,1,2-Trichloroethane MR 2 2006
Tetrachloroethylene MR 2 2006
Benzene MR 2 2006
Toluene MR 2 2006
Trichloroethylene MR 2 2006
Carbon tetrachloride MR 2 2006
Styrene MR 2 2006
DICHLOROMETHANE MR 2 2006
CHLOROBENZENE MR 2 2006
Ethylbenzene MR 2 2006
Total Haloacetic Acids (HAA5) MR 2 2022
Revised Total Coliform Rule MON 2 2016
TTHM MR 2 2022
1,2,4-Trichlorobenzene MR 1 2006
Vinyl chloride MR 1 2006
Thallium, Total MR 1 2004
Beryllium, Total MR 1 2004
Nickel MR 1 2004
Mercury MR 1 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 Walnut Creek 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 AZ0408078 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 Walnut Creek 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
2022 Lead and Copper Rule MR 11 SDWIS / AZ0408078 / 5000
2022 Revised Total Coliform Rule RPT 4 SDWIS / AZ0408078 / 8000
2022 Total Haloacetic Acids (HAA5) MR 2 SDWIS / AZ0408078 / 2456
2022 TTHM MR 2 SDWIS / AZ0408078 / 2950
2016 Coliform (TCR) MR 14 SDWIS / AZ0408078 / 3100
2016 Revised Total Coliform Rule MON 2 SDWIS / AZ0408078 / 8000
2006 cis-1,2-Dichloroethylene MR 2 SDWIS / AZ0408078 / 2380
2006 o-Dichlorobenzene MR 2 SDWIS / AZ0408078 / 2968
2006 p-Dichlorobenzene MR 2 SDWIS / AZ0408078 / 2969
2006 1,1-Dichloroethylene MR 2 SDWIS / AZ0408078 / 2977
2006 trans-1,2-Dichloroethylene MR 2 SDWIS / AZ0408078 / 2979
2006 1,2-Dichloroethane MR 2 SDWIS / AZ0408078 / 2980
2006 1,1,1-Trichloroethane MR 2 SDWIS / AZ0408078 / 2981
2006 1,2-Dichloropropane MR 2 SDWIS / AZ0408078 / 2983
2006 1,1,2-Trichloroethane MR 2 SDWIS / AZ0408078 / 2985

How Walnut Creek Water Company Compares

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

Metric Walnut Creek Water Company Arizona avg Federal benchmark
Total violations 90 153.3 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 728 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 Walnut Creek Water Company water safe to drink? ▼
Walnut Creek Water Company (PWS ID: AZ0408078) has 90 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 728 people using Groundwater sources.
How many people does Walnut Creek Water Company serve? ▼
Walnut Creek Water Company serves 728 people in Glendale, Arizona. It is a Public/Private-owned system using Groundwater water sources with 291 service connections.
What type of violations does Walnut Creek Water Company have? ▼
Walnut Creek Water Company has 90 total violations: 0 health-based violations (MCL exceedances or treatment failures), 84 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Walnut Creek Water Company water? ▼
No PFAS testing data is available for Walnut Creek Water Company under the EPA's UCMR5 monitoring program.
What water source does Walnut Creek Water Company use? ▼
Walnut Creek 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.
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.