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O FALLON

Serving 1 city in IL

Monitor
2 above health guidelines
47K
People Served
1
City
1
Water Sources
0
MCL Violations

Is O FALLON Water Safe to Drink?

O FALLON has reported 2 contaminants above EPA health-based guidelines (MCLGs) in at least one city served. We recommend reviewing individual city reports below for specific water quality details.

This utility serves 46,603 people across 1 city in IL. Water quality can vary by location within the service area. Check individual city pages below for detailed contaminant data specific to your area.

O FALLON Service Area

O FALLON Contact & Information

Mailing Address

CITY HALL 255 SOUTH LINCOLN AVENUE O'fallon, IL 62269

Water Sources

Surface water purchased

Treatment Methods

no treatment

Disinfectant Used

chloramines, hypochlorite

Recommended Water Filters for O FALLON

Based on water quality data from cities served by O FALLON, we recommend NSF-certified filters that can remove contaminants above health guidelines.

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O FALLON Water Quality Report 2025 | O'Fallon, Illinois | Contact & Safety Data | TapWaterData