TRI-COUNTY INDUSTRIAL PARK #1
PWS ID: OR4193921 · TUALATIN, Oregon 97062
Population Served
100
Total Violations
79
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 10
- County
- Washington
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 77
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 13 | 1999 |
| Lead and Copper Rule | MR | 6 | 2021 |
| Dalapon | MR | 2 | 2005 |
| Endothall | MR | 2 | 2005 |
| Nitrate | MR | 2 | 1998 |
| Methoxychlor | MR | 2 | 2005 |
| Endrin | MR | 2 | 2005 |
| Arsenic | MR | 1 | 2005 |
| BHC-GAMMA | MR | 1 | 2005 |
| Toxaphene | MR | 1 | 2005 |
| Diquat | MR | 1 | 2005 |
| Glyphosate | MR | 1 | 2005 |
| OXAMYL | MR | 1 | 2005 |
| Simazine | MR | 1 | 2005 |
| Picloram | MR | 1 | 2005 |
| Dinoseb | MR | 1 | 2005 |
| Atrazine | MR | 1 | 2005 |
| LASSO | MR | 1 | 2005 |
| Heptachlor | MR | 1 | 2005 |
| Heptachlor epoxide | MR | 1 | 2005 |
| 2,4-D | MR | 1 | 2005 |
| 2,4,5-TP | MR | 1 | 2005 |
| HEXACHLOROBENZENE | MR | 1 | 2005 |
| Pentachlorophenol | MR | 1 | 2005 |
| Total Polychlorinated Biphenyls (PCB) | MR | 1 | 2005 |
| ETHYLENE DIBROMIDE | MR | 1 | 2005 |
| 1,2,4-Trichlorobenzene | MR | 1 | 2005 |
| Xylenes, Total | MR | 1 | 2005 |
| trans-1,2-Dichloroethylene | MR | 1 | 2005 |
| 1,2-Dichloroethane | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.