Community Water System · PWS AZ0411100
Thunderbird Farms Dwid
Operator location Maricopa, Arizona - 27% of 484 violations are health-based (upper-third health share (> 23%)); groundwater source; 2,231 served per SDWIS.
- 2,231
- People served (this PWS)
- 484
- EPA violations (this PWS)
- 132
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Thunderbird Farms Dwid standing, high SDWIS violation third
27% of 484 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 27% is upper-third health share (> 23%). Population rank #12,750 of 29,740 among systems serving 500+.
The verdict
Thunderbird Farms Dwid sits in the upper third of the sitemap cohort by violation count (484), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 2,231 (mid served population (≤ 3,309)). Health-based share is 27% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #12,750 of 29,740
- Population · /systems
- #179 of 413
- Population · AZ
- 484
- Total EPA violations on record
- 27%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
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 |
Violation Count vs. the National Corpus
Thunderbird Farms Dwid has 484 recorded EPA violations, 95% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 5% carry more. 27% of this system's own violations are health-based (132 of 484), and it ranks #12,750 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
484 Higher than most more violations than 95% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
Health-based violations on Thunderbird Farms Dwid
132 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for AZ0411100.
Sources: EPA SDWIS · Arizona DEQ, Drinking Water Program
Nationwide peers
484 violations · 2,231 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Thunderbird Farms Dwid
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Arizona compares on the same EPA violation measures. Arizona systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.