JOLIET Water Quality Report
Population
160,000
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 13
violations recorded
C
Fair
Safety Grade
13 violations in the past 5 years, including 2 health-based
System Details
- PWSID
- IL1970450
- Population Served
- 160,000
- Water Source
- Ground Water
- Owner
- Local Government
- State
- Illinois
- EPA Region
- 5
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ✕ Health-Based | 4 |
| Nitrate | ⚠ Monitoring/Reporting | 6 |
| Radium-226 | ⚠ Monitoring/Reporting | 9 |
| Contaminant 4109 | ⚠ Monitoring/Reporting | 9 |
| Contaminant 5200 | ✕ Health-Based | 1 |
Violation History
2024
13
2017
15
1993
1
Total violations on record: 29
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, Radium-226
How does this compare?
This systemNational average
Grade C
Avg: B-C
29violations total
104% of national average
National avg: ~28 per system
🏙️ This is a large system — serving 24× more people than the national average.