TONTO BASIN SCHOOL DISTRICT 33
PWS ID: AZ0404055 · TONTO BASIN, Arizona 85553
Population Served
90
Total Violations
194
Health-Based Violations
16
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Gila
- School/Daycare
- Yes
- MCL Violations
- 2
- Monitoring Violations
- 160
- Treatment Tech Violations
- 14
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Chlorine | MR | 50 | 2025 |
| Coliform (TCR) | MR | 27 | 2015 |
| Revised Total Coliform Rule | TT | 11 | 2025 |
| Lead and Copper Rule | MR | 6 | 2023 |
| E. COLI | MR | 6 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2007 |
| TTHM | MR | 5 | 2007 |
| Public Notice | Other | 5 | 2024 |
| LEAD AND COPPER RULE REVISIONS | RPT | 3 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 3 | 2024 |
| Coliform (TCR) | MCL | 2 | 2006 |
| Revised Total Coliform Rule | RPT | 2 | 2020 |
| Antimony, Total | MR | 1 | 1998 |
| Beryllium, Total | MR | 1 | 1998 |
| Thallium, Total | MR | 1 | 1998 |
| Xylenes, Total | MR | 1 | 1998 |
| DICHLOROMETHANE | MR | 1 | 1998 |
| p-Dichlorobenzene | MR | 1 | 1998 |
| 1,1-Dichloroethylene | MR | 1 | 1998 |
| trans-1,2-Dichloroethylene | MR | 1 | 1998 |
| 1,1,1-Trichloroethane | MR | 1 | 1998 |
| 1,1,2-Trichloroethane | MR | 1 | 1998 |
| Tetrachloroethylene | MR | 1 | 1998 |
| Arsenic | MR | 1 | 1998 |
| Benzene | MR | 1 | 1998 |
| Toluene | MR | 1 | 1998 |
| Ethylbenzene | MR | 1 | 1998 |
| BHC-GAMMA | MR | 1 | 1998 |
| Diquat | MR | 1 | 1998 |
| Barium | MR | 1 | 1998 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.