Private Well Construction and PFAS Protection
The construction quality of private drinking water wells significantly affects susceptibility to PFAS contamination from surface sources. Well casing integrity, grouting quality, and wellhead protection zone conditions determine how effectively wells prevent PFAS-contaminated surface water infiltration.
Casing and Grouting Standards
State well construction codes specify minimum casing depth, material standards, and grouting requirements designed to seal the annular space and prevent shallow contaminated water from entering deep aquifer zones. Wells constructed before modern codes or with degraded grouting are more vulnerable to PFAS infiltration.
Wellhead Protection Programs
EPA’s Wellhead Protection Program encourages states to establish protection areas around public and private wells, restricting PFAS-related land uses within delineated zones. Wellhead protection programs for private wells in PFAS-affected areas provide land use guidance to reduce contamination risk.
Well Rehabilitation and Replacement
Private well owners with PFAS contamination should evaluate whether rehabilitation or replacement provides better long-term protection. Deepening wells into less-contaminated aquifer zones, sealing off shallow contaminated zones, or connecting to municipal systems are options depending on local hydrogeology and regulatory support