HERMISTON, CITY OF Water Quality Report
Population
20,000
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 22
violations recorded
C
Fair
Safety Grade
22 violations in the past 5 years
System Details
- PWSID
- OR4100372
- Population Served
- 20,000
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Oregon
- EPA Region
- 10
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Total Trihalomethanes (TTHMs) | ⚠ Monitoring/Reporting | 2 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 2 |
| Contaminant 3028 | ⚠ Monitoring/Reporting | 16 |
| Nitrate | ⚠ Monitoring/Reporting | 4 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 2 |
Violation History
2025
2
2023
4
2022
16
2016
4
Total violations on record: 26
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Reverse Osmosis System
Removes up to 99% of contaminants including PFAS, lead, arsenic, and nitrates
Removes: Nitrate
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
How does this compare?
This systemNational average
Grade C
Avg: B-C
26violations total
93% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 3× the national average.