Flooding as a PFAS Redistribution Event
Major flooding events redistribute PFAS from contaminated soils, industrial sites, and infrastructure to previously uncontaminated areas. Flood water can introduce PFAS to private wells, surface water intakes, and residential properties, creating post-disaster contamination assessments.
PFAS in Flood-Affected Private Wells
Private wells in flood-inundated areas should be tested for PFAS alongside standard microbial and nitrate parameters after flood events. Floodwater contact with well casing can introduce PFAS from surface contamination into previously clean groundwater sources.
Municipal Water System Flood Impacts
Flooding of water treatment plant facilities can overwhelm treatment processes and introduce contaminated flood water into distribution systems. Post-flood water quality testing should include PFAS analysis at water treatment plants serving areas with known PFAS contamination history.
Emergency Response Protocols
FEMA and EPA emergency response guidance for flooding events is being updated to include PFAS contamination assessment protocols. Post-disaster recovery funding should include PFAS testing and remediation for affected water systems as a standard component of disaster recovery programs.