Local water quality
Water quality in O Fallon, Missouri
1 public water system · PFAS detected · EPA data
The bottom line
EPA records for the water serving O Fallon, Missouri show Lead. A filter independently certified to reduce those exact contaminants is the most direct fix.
What's in O Fallon's water
Contaminants EPA has recorded across O Fallon's water systems, and how many certified filters remove each.
The water system serving O Fallon
Open a system for its full report — measured levels vs. federal limits, PFAS, and the certified filters that remove each contaminant.
Filter your O Fallon water
Match a certified filter to what's actually in your water — a filter certified for lead may do nothing for PFAS or fluoride.