ONTARIO, CITY OF Water Quality Report
Population
14,465
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 27
violations recorded
C
Fair
Safety Grade
27 violations in the past 5 years
System Details
- PWSID
- OR4100587
- Population Served
- 14,465
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Oregon
- EPA Region
- 10
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 0800 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 0200 | ⚠ Monitoring/Reporting | 16 |
| Contaminant 0300 | ⚠ Monitoring/Reporting | 8 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 1 |
Violation History
2024
1
2023
26
2008
1
Total violations on record: 28
Service Area
Cities Served
ZIP Codes Served
Recommended Water Filters
Based on contaminants detected in this water system:
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Haloacetic Acids (HAA5)
How does this compare?
This systemNational average
Grade C
Avg: B-C
28violations total
100% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 2× the national average.