HILLTOP IMPROVEMENT DISTRICT
PWS ID: OR4100237 · COTTAGE GROVE, Oregon 97424
Population Served
45
Total Violations
615
Health-Based Violations
67
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 19
- County
- Lane
- School/Daycare
- No
- MCL Violations
- 67
- Monitoring Violations
- 533
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 149 | 2009 |
| Arsenic | MCL | 35 | 2010 |
| Coliform (TCR) | MCL | 32 | 2009 |
| Diquat | MR | 6 | 1996 |
| Endrin | MR | 6 | 1996 |
| ETHYLENE DIBROMIDE | MR | 6 | 1996 |
| Heptachlor epoxide | MR | 6 | 1996 |
| HEXACHLOROBENZENE | MR | 6 | 1996 |
| Hexachlorocyclopentadiene | MR | 6 | 1996 |
| Methoxychlor | MR | 6 | 1996 |
| Di(2-ethylhexyl) phthalate | MR | 6 | 1996 |
| Picloram | MR | 6 | 1996 |
| Simazine | MR | 6 | 1996 |
| Toxaphene | MR | 6 | 1996 |
| OXAMYL | MR | 6 | 1996 |
| 1,1-Dichloroethylene | MR | 6 | 1996 |
| 1,1,1-Trichloroethane | MR | 6 | 1996 |
| 1,1,2-Trichloroethane | MR | 6 | 1996 |
| 1,2-Dichloropropane | MR | 6 | 1996 |
| 1,2,4-Trichlorobenzene | MR | 6 | 1996 |
| cis-1,2-Dichloroethylene | MR | 6 | 1996 |
| CHLOROBENZENE | MR | 6 | 1996 |
| Styrene | MR | 6 | 1996 |
| Tetrachloroethylene | MR | 6 | 1996 |
| Toluene | MR | 6 | 1996 |
| Trichloroethylene | MR | 6 | 1996 |
| Barium | MR | 6 | 1996 |
| Cadmium | MR | 6 | 1996 |
| Chromium | MR | 6 | 1996 |
| Selenium | MR | 6 | 1996 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.