OTTAWA Water Quality Report
Population
18,097
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
—
of 49,184 US systems
5-Year Record
⚠️ 45
violations recorded
F
Unsafe
Safety Grade
45 violations in the past 5 years, including 7 health-based
System Details
- PWSID
- IL0990800
- Population Served
- 18,097
- Water Source
- Ground Water
- Owner
- Local Government
- State
- Illinois
- EPA Region
- 5
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ✕ Health-Based | 2 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 1 |
| Contaminant 4109 | ⚠ Monitoring/Reporting | 9 |
| Total Trihalomethanes (TTHMs) | ⚠ Monitoring/Reporting | 14 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 14 |
| Radium-226 | ✕ Health-Based | 13 |
| Contaminant 2976 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2981 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2955 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2991 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2983 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2979 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2992 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2982 | ⚠ Monitoring/Reporting | 8 |
| Tetrachloroethylene (PCE) | ⚠ Monitoring/Reporting | 8 |
| Vinyl Chloride | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2985 | ⚠ Monitoring/Reporting | 8 |
| Chloramine | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2977 | ⚠ Monitoring/Reporting | 8 |
| Trichloroethylene (TCE) | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2989 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2987 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2996 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2990 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2980 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2968 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 2378 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 5200 | ⚠ Monitoring/Reporting | 1 |
Violation History
2025
1
2023
18
2022
26
2020
168
2018
6
2005
1
1998
1
1992
1
Total violations on record: 222
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: Radium-226
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Trichloroethylene (TCE), Tetrachloroethylene (PCE), Vinyl Chloride
How does this compare?
This systemNational average
Grade F
Avg: B-C
222violations total
793% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 3× the national average.