DEERFIELD Water Quality Report
Population
19,196
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 11
violations recorded
C
Fair
Safety Grade
11 violations in the past 5 years, including 1 health-based
System Details
- PWSID
- IL0974340
- Population Served
- 19,196
- Water Source
- Surface Water
- Owner
- Local Government
- State
- Illinois
- EPA Region
- 5
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ✕ Health-Based | 2 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 8 |
| Total Trihalomethanes (TTHMs) | ⚠ Monitoring/Reporting | 3 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 3 |
Violation History
2025
7
2023
2
2022
2
2019
1
2018
1
2014
1
2005
1
1992
1
Total violations on record: 16
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: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
How does this compare?
This systemNational average
Grade C
Avg: B-C
16violations total
57% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 3× the national average.