HERITAGE IMPROVEMENT DISTRICT
PWS ID: OR4100615 · PENDLETON, Oregon 97801
Population Served
125
Total Violations
133
Health-Based Violations
16
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 58
- County
- Umatilla
- School/Daycare
- No
- MCL Violations
- 16
- Monitoring Violations
- 95
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 25 | 2010 |
| Coliform (TCR) | MCL | 16 | 2014 |
| Consumer Confidence Rule | Other | 8 | 2003 |
| E. COLI | MR | 8 | 2014 |
| Public Notice | Other | 7 | 2014 |
| Nitrate | MR | 4 | 2008 |
| Lead and Copper Rule | MR | 2 | 2018 |
| Arsenic | MR | 1 | 2002 |
| cis-1,2-Dichloroethylene | MR | 1 | 2002 |
| DICHLOROMETHANE | MR | 1 | 2002 |
| o-Dichlorobenzene | MR | 1 | 2002 |
| p-Dichlorobenzene | MR | 1 | 2002 |
| Vinyl chloride | MR | 1 | 2002 |
| 1,1-Dichloroethylene | MR | 1 | 2002 |
| trans-1,2-Dichloroethylene | MR | 1 | 2002 |
| 1,2-Dichloropropane | MR | 1 | 2002 |
| Trichloroethylene | MR | 1 | 2002 |
| 1,1,2-Trichloroethane | MR | 1 | 2002 |
| Tetrachloroethylene | MR | 1 | 2002 |
| Toluene | MR | 1 | 2002 |
| Ethylbenzene | MR | 1 | 2002 |
| Styrene | MR | 1 | 2002 |
| BHC-GAMMA | MR | 1 | 2002 |
| Methoxychlor | MR | 1 | 2002 |
| Diquat | MR | 1 | 2002 |
| Di(2-ethylhexyl) adipate | MR | 1 | 2002 |
| OXAMYL | MR | 1 | 2002 |
| Di(2-ethylhexyl) phthalate | MR | 1 | 2002 |
| Picloram | MR | 1 | 2002 |
| Dinoseb | MR | 1 | 2002 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.