ANTELOPE UNION HIGH SCHOOL
PWS ID: AZ0414044 · WELLTON, Arizona 85356
Population Served
375
Total Violations
476
Health-Based Violations
59
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 17
- County
- Yuma
- School/Daycare
- Yes
- MCL Violations
- 15
- Monitoring Violations
- 375
- Treatment Tech Violations
- 44
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 40 | 2016 |
| Total Haloacetic Acids (HAA5) | MR | 38 | 2025 |
| TTHM | MR | 38 | 2025 |
| E. COLI | MR | 36 | 2018 |
| Surface Water Treatment Rule | TT | 31 | 2004 |
| Chlorine | MR | 30 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 23 | 2025 |
| Revised Total Coliform Rule | RPT | 22 | 2025 |
| Lead and Copper Rule | MR | 21 | 2021 |
| Surface Water Treatment Rule | MR | 16 | 2024 |
| Nitrate | MR | 16 | 2006 |
| Revised Total Coliform Rule | MON | 10 | 2024 |
| TTHM | MCL | 10 | 2017 |
| Mercury | MR | 8 | 1999 |
| Public Notice | Other | 8 | 2025 |
| Chromium | MR | 8 | 1999 |
| Barium | MR | 8 | 1999 |
| Cadmium | MR | 8 | 1999 |
| Selenium | MR | 8 | 1999 |
| Arsenic | MR | 8 | 1999 |
| Interim Enhanced Surface Water Treatment Rule | TT | 6 | 2025 |
| Fluoride | MR | 6 | 1991 |
| Total Haloacetic Acids (HAA5) | MCL | 5 | 2017 |
| Lead and Copper Rule | TT | 4 | 2017 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| Long Term 2 Enhanced Surface Water Treatment Rule | MR | 2 | 2017 |
| Revised Total Coliform Rule | Other | 2 | 2021 |
| Beryllium, Total | MR | 2 | 1999 |
| Thallium, Total | MR | 2 | 1999 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.