CREST HILL Water Quality Report
Population
21,169
people served
Water Source
🏔️ Ground
wells & aquifers
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 28
violations recorded
C
Fair
Safety Grade
28 violations in the past 5 years, including 3 health-based
System Details
- PWSID
- IL1970250
- Population Served
- 21,169
- Water Source
- Ground Water
- Owner
- Local Government
- State
- Illinois
- EPA Region
- 5
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ✕ Health-Based | 11 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 4 |
| Contaminant 0999 | ⚠ Monitoring/Reporting | 8 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 7 |
| Total Trihalomethanes (TTHMs) | ⚠ Monitoring/Reporting | 5 |
| Haloacetic Acids (HAA5) | ⚠ Monitoring/Reporting | 5 |
| Mercury | ⚠ Monitoring/Reporting | 1 |
| Cyanide | ⚠ Monitoring/Reporting | 3 |
| Radium-226 | ⚠ Monitoring/Reporting | 3 |
| Contaminant 7500 | ⚠ Monitoring/Reporting | 4 |
| Contaminant 5200 | ⚠ Monitoring/Reporting | 1 |
Violation History
2025
4
2024
5
2023
12
2021
7
2020
6
2019
3
2018
4
2016
6
2013
1
2005
1
Total violations on record: 52
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, Mercury
Activated Carbon Filter
Effective for chlorine, THMs, pesticides, and taste/odor improvement
Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5)
Water Distiller
Removes heavy metals, minerals, and most contaminants through evaporation
Removes: Mercury
How does this compare?
This systemNational average
Grade C
Avg: B-C
52violations total
186% of national average
National avg: ~28 per system
📍 Mid-to-large system — serves 3× the national average.