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Community Water System · PWS AZ0402042

Willow Lakes Property Owners Assoc

Benson, Arizona 85602 - drinking water served from groundwater sources to 190 people, tracked in EPA SDWIS and UCMR5.

190
People served
261
EPA violations
25
Health-based
Untested
UCMR5 result

The verdict

EPA records 261 drinking-water violations at Willow Lakes Property Owners Assoc, 10% of them health-based - above the Arizona per-system average.

261
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
190
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Willow Lakes Property Owners Assoc

Willow Lakes Property Owners Assoc is a private-owned community water system that delivers drinking water to 190 residents in Benson, Arizona (Cochise County) through 80 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 261 total violations for this system , of which 25 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 163 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 Coliform (TCR), recorded in 59 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%).

Willow Lakes Property Owners Assoc's 261 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
190
Total Violations
261
Health-Based Violations
25
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
80
County
Cochise
School/Daycare
No
MCL Violations
3
Monitoring Violations
163
Treatment Tech Violations
22

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 59 2015
Consumer Confidence Rule Other 39 2025
E. COLI MR 20 2024
Revised Total Coliform Rule TT 16 2024
Chlorine MR 12 2022
DICHLOROMETHANE MR 10 2001
Public Notice Other 9 2024
Lead and Copper Rule MR 6 2023
Nitrate MR 5 2003
TTHM MR 4 2012
Total Haloacetic Acids (HAA5) MR 4 2012
Revised Total Coliform Rule RPT 4 2024
Groundwater Rule TT 4 2024
Coliform (TCR) MCL 3 2009
Revised Total Coliform Rule MON 3 2020
LEAD AND COPPER RULE REVISIONS RPT 2 2024
Xylenes, Total MR 2 1999
1,2,4-Trichlorobenzene MR 2 1999
cis-1,2-Dichloroethylene MR 2 1999
o-Dichlorobenzene MR 2 1999
p-Dichlorobenzene MR 2 1999
1,1-Dichloroethylene MR 2 1999
trans-1,2-Dichloroethylene MR 2 1999
1,2-Dichloroethane MR 2 1999
1,1,1-Trichloroethane MR 2 1999
1,2-Dichloropropane MR 2 1999
Trichloroethylene MR 2 1999
1,1,2-Trichloroethane MR 2 1999
Tetrachloroethylene MR 2 1999
CHLOROBENZENE 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 Willow Lakes Property Owners Assoc.

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 AZ0402042 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 Willow Lakes Property Owners Assoc 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 Consumer Confidence Rule Other 39 SDWIS / AZ0402042 / 7000
2024 E. COLI MR 20 SDWIS / AZ0402042 / 3014
2024 Revised Total Coliform Rule TT 16 SDWIS / AZ0402042 / 8000
2024 Public Notice Other 9 SDWIS / AZ0402042 / 7500
2024 Revised Total Coliform Rule RPT 4 SDWIS / AZ0402042 / 8000
2024 Groundwater Rule TT 4 SDWIS / AZ0402042 / 0700
2024 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / AZ0402042 / 5200
2024 LEAD AND COPPER RULE REVISIONS TT 2 SDWIS / AZ0402042 / 5200
2023 Lead and Copper Rule MR 6 SDWIS / AZ0402042 / 5000
2022 Chlorine MR 12 SDWIS / AZ0402042 / 0999
2020 Revised Total Coliform Rule MON 3 SDWIS / AZ0402042 / 8000
2015 Coliform (TCR) MR 59 SDWIS / AZ0402042 / 3100
2012 TTHM MR 4 SDWIS / AZ0402042 / 2950
2012 Total Haloacetic Acids (HAA5) MR 4 SDWIS / AZ0402042 / 2456
2009 Coliform (TCR) MCL 3 SDWIS / AZ0402042 / 3100

How Willow Lakes Property Owners Assoc Compares

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

Metric Willow Lakes Property Owners Assoc Arizona avg Federal benchmark
Total violations 261 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 25 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 190 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 Willow Lakes Property Owners Assoc water safe to drink? ▼
Willow Lakes Property Owners Assoc (PWS ID: AZ0402042) has 261 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 190 people using Groundwater sources.
How many people does Willow Lakes Property Owners Assoc serve? ▼
Willow Lakes Property Owners Assoc serves 190 people in Benson, Arizona. It is a Private-owned system using Groundwater water sources with 80 service connections.
What type of violations does Willow Lakes Property Owners Assoc have? ▼
Willow Lakes Property Owners Assoc has 261 total violations: 25 health-based violations (MCL exceedances or treatment failures), 163 monitoring/reporting violations, and 22 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Willow Lakes Property Owners Assoc water? ▼
No PFAS testing data is available for Willow Lakes Property Owners Assoc under the EPA's UCMR5 monitoring program.
What water source does Willow Lakes Property Owners Assoc use? ▼
Willow Lakes Property Owners Assoc 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.