ARBOR SCHOOL
PWS ID: OR4194894 · TUALATIN, Oregon 97062
Population Served
215
Total Violations
151
Health-Based Violations
4
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Local
- Connections
- 1
- County
- Clackamas
- School/Daycare
- Yes
- MCL Violations
- 0
- Monitoring Violations
- 145
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 52 | 2016 |
| Revised Total Coliform Rule | MON | 17 | 2020 |
| Lead and Copper Rule | MR | 12 | 2011 |
| Nitrate | MR | 5 | 2008 |
| E. COLI | MR | 5 | 2020 |
| Revised Total Coliform Rule | TT | 4 | 2019 |
| Benzo(a)pyrene | MR | 2 | 2020 |
| Heptachlor epoxide | MR | 2 | 2020 |
| Heptachlor | MR | 2 | 2020 |
| Atrazine | MR | 2 | 2020 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2020 |
| Methoxychlor | MR | 2 | 2020 |
| Endrin | MR | 2 | 2020 |
| Public Notice | Other | 2 | 2019 |
| HEXACHLOROBENZENE | MR | 2 | 2020 |
| LASSO | MR | 2 | 2020 |
| Hexachlorocyclopentadiene | MR | 2 | 2020 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2020 |
| Simazine | MR | 2 | 2020 |
| BHC-GAMMA | MR | 2 | 2020 |
| Endothall | MR | 1 | 2005 |
| Dalapon | MR | 1 | 2005 |
| Toxaphene | MR | 1 | 2005 |
| cis-1,2-Dichloroethylene | MR | 1 | 2005 |
| DICHLOROMETHANE | MR | 1 | 2005 |
| p-Dichlorobenzene | MR | 1 | 2005 |
| Vinyl chloride | MR | 1 | 2005 |
| 1,1-Dichloroethylene | MR | 1 | 2005 |
| 1,2-Dichloroethane | MR | 1 | 2005 |
| Carbon tetrachloride | MR | 1 | 2005 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.