MOHAWK VALLEY SCHOOL DISTRICT
PWS ID: AZ0414055 · ROLL, Arizona 85347
Population Served
171
Total Violations
1,438
Health-Based Violations
733
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 11
- County
- Yuma
- School/Daycare
- Yes
- MCL Violations
- 153
- Monitoring Violations
- 576
- Treatment Tech Violations
- 580
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | TT | 444 | 2024 |
| Interim Enhanced Surface Water Treatment Rule | MR | 155 | 2024 |
| Surface Water Treatment Rule | MR | 126 | 2024 |
| TTHM | MCL | 117 | 2025 |
| CARBON, TOTAL | TT | 81 | 2025 |
| Chlorine | MR | 75 | 2023 |
| Surface Water Treatment Rule | TT | 53 | 2025 |
| Public Notice | Other | 39 | 2025 |
| Revised Total Coliform Rule | RPT | 36 | 2025 |
| Total Haloacetic Acids (HAA5) | MCL | 26 | 2023 |
| Coliform (TCR) | MR | 24 | 2016 |
| TTHM | MR | 22 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 20 | 2025 |
| CARBON, TOTAL | MR | 17 | 2024 |
| Nitrate | MR | 16 | 2003 |
| E. COLI | MR | 10 | 2018 |
| Lead and Copper Rule | MR | 8 | 2024 |
| Revised Total Coliform Rule | MCL | 8 | 2022 |
| Revised Total Coliform Rule | MON | 7 | 2023 |
| Consumer Confidence Rule | Other | 6 | 2021 |
| Arsenic | MR | 4 | 2004 |
| Selenium | MR | 3 | 1999 |
| Mercury | MR | 3 | 1999 |
| Cadmium | MR | 3 | 1999 |
| Chromium | MR | 3 | 1999 |
| Endothall | MR | 3 | 2001 |
| Barium | MR | 3 | 1999 |
| Revised Total Coliform Rule | TT | 2 | 2023 |
| CYANIDE | MR | 2 | 1999 |
| cis-1,2-Dichloroethylene | MR | 2 | 1998 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.