MONROE, CITY OF
PWS ID: OR4100540 · HARRISBURG, Oregon 97446
Population Served
723
Total Violations
245
Health-Based Violations
156
Water Source
Surface Water
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 343
- County
- Benton
- School/Daycare
- No
- MCL Violations
- 156
- Monitoring Violations
- 67
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 117 | 2025 |
| Total Haloacetic Acids (HAA5) | MCL | 38 | 2022 |
| Surface Water Treatment Rule | MR | 18 | 2024 |
| Public Notice | Other | 18 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 12 | 2023 |
| TTHM | MR | 12 | 2023 |
| Lead and Copper Rule | MR | 11 | 2024 |
| Coliform (TCR) | MR | 10 | 2001 |
| Consumer Confidence Rule | Other | 2 | 2023 |
| Nitrate | MR | 2 | 2003 |
| Combined Radium (-226 and -228) | MR | 1 | 1976 |
| Gross Alpha, Excl. Radon and U | MR | 1 | 1976 |
| Coliform (TCR) | MCL | 1 | 2007 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.