RILLITO WATER USERS ASSOC
PWS ID: AZ0410098 · RILLITO, Arizona 85654
Population Served
165
Total Violations
132
Health-Based Violations
6
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 55
- County
- Pima
- School/Daycare
- No
- MCL Violations
- 2
- Monitoring Violations
- 99
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 39 | 2015 |
| Chlorine | MR | 15 | 2023 |
| Consumer Confidence Rule | Other | 13 | 2022 |
| Nitrate | MR | 11 | 2005 |
| Gross Alpha, Excl. Radon and U | MR | 4 | 1988 |
| LEAD AND COPPER RULE REVISIONS | RPT | 4 | 2024 |
| LEAD AND COPPER RULE REVISIONS | TT | 4 | 2024 |
| Lead and Copper Rule | MR | 3 | 2007 |
| 1,2-Dichloropropane | MR | 2 | 2001 |
| Public Notice | Other | 2 | 2024 |
| DICHLOROMETHANE | MR | 1 | 1987 |
| cis-1,2-Dichloroethylene | MR | 1 | 1987 |
| Carbon tetrachloride | MR | 1 | 1987 |
| Arsenic | MR | 1 | 1988 |
| Tetrachloroethylene | MR | 1 | 1987 |
| Cadmium | MR | 1 | 1988 |
| CHLOROBENZENE | MR | 1 | 1987 |
| o-Dichlorobenzene | MR | 1 | 1987 |
| 1,1,1-Trichloroethane | MR | 1 | 1987 |
| p-Dichlorobenzene | MR | 1 | 1987 |
| Styrene | MR | 1 | 1987 |
| Trichloroethylene | MR | 1 | 1987 |
| Barium | MR | 1 | 1988 |
| Coliform (TCR) | MCL | 1 | 1999 |
| Toluene | MR | 1 | 1987 |
| Selenium | MR | 1 | 1988 |
| Mercury | MR | 1 | 1988 |
| Chromium | MR | 1 | 1988 |
| Benzene | MR | 1 | 1987 |
| trans-1,2-Dichloroethylene | MR | 1 | 1987 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.