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Community Water System · PWS AZ0411100

Thunderbird Farms Dwid

Maricopa, Arizona 85139 - drinking water served from groundwater sources to 2,231 people, tracked in EPA SDWIS and UCMR5.

2,231
People served
484
EPA violations
132
Health-based
Untested
UCMR5 result

The verdict

EPA records 484 drinking-water violations at Thunderbird Farms Dwid, 27% of them health-based - above the Arizona per-system average.

484
Total EPA violations on record
27%
Health-based (MCL / treatment failure)
2,231
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Thunderbird Farms Dwid

Thunderbird Farms Dwid is a public/private-owned community water system that delivers drinking water to 2,231 residents in Maricopa, Arizona (Pinal County) through 594 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 484 total violations for this system , of which 132 (27%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 300 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Nitrate, recorded in 77 violations (MCL, health-based). 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%).

Thunderbird Farms Dwid's 484 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
2,231
Total Violations
484
Health-Based Violations
132
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Public/Private
Connections
594
County
Pinal
School/Daycare
No
MCL Violations
132
Monitoring Violations
300
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MCL 77 2017
Coliform (TCR) MR 71 2015
Nitrate MR 67 2015
Chlorine MR 63 2015
Arsenic MR 60 2015
Arsenic MCL 52 2017
Consumer Confidence Rule Other 32 2018
Total Haloacetic Acids (HAA5) MR 13 2012
TTHM MR 11 2012
Lead and Copper Rule MR 6 2005
Fluoride MCL 2 2000
E. COLI MR 2 2013
Chromium MR 1 1988
Fluoride MR 1 1988
Gross Alpha, Excl. Radon and U MR 1 1980
Mercury MR 1 1988
Cadmium MR 1 1988
Selenium MR 1 1988
Barium MR 1 1988
Coliform (TCR) MCL 1 2002

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 Thunderbird Farms Dwid.

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 AZ0411100 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 Thunderbird Farms Dwid 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
2018 Consumer Confidence Rule Other 32 SDWIS / AZ0411100 / 7000
2017 Nitrate MCL 77 SDWIS / AZ0411100 / 1040
2017 Arsenic MCL 52 SDWIS / AZ0411100 / 1005
2015 Coliform (TCR) MR 71 SDWIS / AZ0411100 / 3100
2015 Nitrate MR 67 SDWIS / AZ0411100 / 1040
2015 Chlorine MR 63 SDWIS / AZ0411100 / 0999
2015 Arsenic MR 60 SDWIS / AZ0411100 / 1005
2013 E. COLI MR 2 SDWIS / AZ0411100 / 3014
2012 Total Haloacetic Acids (HAA5) MR 13 SDWIS / AZ0411100 / 2456
2012 TTHM MR 11 SDWIS / AZ0411100 / 2950
2005 Lead and Copper Rule MR 6 SDWIS / AZ0411100 / 5000
2002 Coliform (TCR) MCL 1 SDWIS / AZ0411100 / 3100
2000 Fluoride MCL 2 SDWIS / AZ0411100 / 1025
1988 Chromium MR 1 SDWIS / AZ0411100 / 1020
1988 Fluoride MR 1 SDWIS / AZ0411100 / 1025

How Thunderbird Farms Dwid Compares

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

Metric Thunderbird Farms Dwid Arizona avg Federal benchmark
Total violations 484 153.3 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 132 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 2,231 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 Thunderbird Farms Dwid water safe to drink? ▼
Thunderbird Farms Dwid (PWS ID: AZ0411100) has 484 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,231 people using Groundwater sources.
How many people does Thunderbird Farms Dwid serve? ▼
Thunderbird Farms Dwid serves 2,231 people in Maricopa, Arizona. It is a Public/Private-owned system using Groundwater water sources with 594 service connections.
What type of violations does Thunderbird Farms Dwid have? ▼
Thunderbird Farms Dwid has 484 total violations: 132 health-based violations (MCL exceedances or treatment failures), 300 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Thunderbird Farms Dwid water? ▼
No PFAS testing data is available for Thunderbird Farms Dwid under the EPA's UCMR5 monitoring program.
What water source does Thunderbird Farms Dwid use? ▼
Thunderbird Farms Dwid 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.