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LA CHOLLA AIRPARK

PWS ID: AZ0420597 · ORO VALLEY, Arizona 85755

LA CHOLLA AIRPARK serves 250 people in ORO VALLEY, Arizona using Groundwater water sources. It has 160 recorded EPA violations, including 2 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: LA CHOLLA AIRPARK

LA CHOLLA AIRPARK is a private-owned community water system that delivers drinking water to 250 residents in ORO VALLEY, Arizona (Pima County) through 113 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 2 (1%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 122 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Chlorine, recorded in 48 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. LA CHOLLA AIRPARK's 160 violations sit above 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
250
Total Violations
160
Health-Based Violations
2
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
113
County
Pima
School/Daycare
No
MCL Violations
2
Monitoring Violations
122
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 48 2024
Consumer Confidence Rule Other 27 2017
Coliform (TCR) MR 15 2016
Lead and Copper Rule MR 11 2023
Total Haloacetic Acids (HAA5) MR 6 2021
TTHM MR 6 2021
Revised Total Coliform Rule RPT 4 2019
Gross Alpha, Excl. Radon and U MR 3 1991
Selenium MR 2 1990
Arsenic MR 2 1990
Mercury MR 2 1990
Chromium MR 2 1990
Fluoride MR 2 1990
Barium MR 2 1990
Nitrate MR 2 1990
DICHLOROMETHANE MR 1 1987
p-Dichlorobenzene MR 1 1987
Gross Alpha, Excl. Radon and U MCL 1 1987
Styrene MR 1 1987
Tetrachloroethylene MR 1 1987
CHLOROBENZENE MR 1 1987
Benzene MR 1 1987
trans-1,2-Dichloroethylene MR 1 1987
1,2-Dichloropropane MR 1 1987
cis-1,2-Dichloroethylene MR 1 1987
1,1,2-Trichloroethane MR 1 1987
Ethylbenzene MR 1 1987
1,1-Dichloroethylene MR 1 1987
1,1,1-Trichloroethane MR 1 1987
o-Dichlorobenzene MR 1 1987

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 LA CHOLLA AIRPARK.

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 AZ0420597 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 LA CHOLLA AIRPARK 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
2024 Chlorine MR 48 SDWIS / AZ0420597 / 0999
2023 Lead and Copper Rule MR 11 SDWIS / AZ0420597 / 5000
2021 Total Haloacetic Acids (HAA5) MR 6 SDWIS / AZ0420597 / 2456
2021 TTHM MR 6 SDWIS / AZ0420597 / 2950
2019 Revised Total Coliform Rule RPT 4 SDWIS / AZ0420597 / 8000
2017 Consumer Confidence Rule Other 27 SDWIS / AZ0420597 / 7000
2016 Coliform (TCR) MR 15 SDWIS / AZ0420597 / 3100
1991 Gross Alpha, Excl. Radon and U MR 3 SDWIS / AZ0420597 / 4000
1990 Selenium MR 2 SDWIS / AZ0420597 / 1045
1990 Arsenic MR 2 SDWIS / AZ0420597 / 1005
1990 Mercury MR 2 SDWIS / AZ0420597 / 1035
1990 Chromium MR 2 SDWIS / AZ0420597 / 1020
1990 Fluoride MR 2 SDWIS / AZ0420597 / 1025
1990 Barium MR 2 SDWIS / AZ0420597 / 1010
1990 Nitrate MR 2 SDWIS / AZ0420597 / 1040

How LA CHOLLA AIRPARK Compares

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

Metric LA CHOLLA AIRPARK Arizona avg Federal benchmark
Total violations 160 153.3 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 250 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 LA CHOLLA AIRPARK water safe to drink? ▼
LA CHOLLA AIRPARK (PWS ID: AZ0420597) has 160 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Groundwater sources.
How many people does LA CHOLLA AIRPARK serve? ▼
LA CHOLLA AIRPARK serves 250 people in ORO VALLEY, Arizona. It is a Private-owned system using Groundwater water sources with 113 service connections.
What type of violations does LA CHOLLA AIRPARK have? ▼
LA CHOLLA AIRPARK has 160 total violations: 2 health-based violations (MCL exceedances or treatment failures), 122 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in LA CHOLLA AIRPARK water? ▼
No PFAS testing data is available for LA CHOLLA AIRPARK under the EPA's UCMR5 monitoring program.
What water source does LA CHOLLA AIRPARK use? ▼
LA CHOLLA AIRPARK 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.

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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.

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