Granite City, Illinois Water Quality Report
Water quality data for 2 water systems serving 8,578 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| PFBA | 0.019 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFBS | 0.021 | No federal limit | 2000.0 ug/L(EPA Health Advisory) | 0% | Below guideline |
| PFHxA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
| PFPeA | 0.005 | No federal limit | 1000.0 ug/L(EWG) | 0% | Below guideline |
Recommended Water Filters
Based on the contaminants detected in your water supply, these filtration systems are recommended:
Reverse Osmosis (RO)
Reverse osmosis systems remove up to 99% of PFAS compounds. Recommended for homes with detected PFAS.
Up to 99% PFAS removal
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in Granite City, Illinois.
Get Water Quality Alerts
Be the first to know when water quality changes in Granite City.
Compliance & Violations
Active Violations (16)
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (31)
72
Jul 1, 2025
72
Jul 1, 2025
27
Jul 1, 2024 — Sep 30, 2024
27
Jul 1, 2024 — Sep 30, 2024
27
Jul 1, 2024 — Sep 30, 2024
+ 26 more resolved violations
Frequently Asked Questions
Is Granite City tap water safe to drink?
Granite City's water meets all EPA maximum contaminant levels. However, 4 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Granite City tap water?
4 contaminants have been detected in Granite City's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Granite City?
Install a water filter rated for the specific contaminants found in Granite City's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Granite City have any water quality violations?
Yes, Granite City currently has 16 active violations. See the violations section above for details.