A foam used for firefighting has allegedly leeched toxins into ECUA water wells near Pensacola's airport and a defunct Navy auxiliary air station ECUA sues national manufacturers over contamination of Escambia water wells A foam used for firefighting has allegedly leeched toxins into ECUA water wells near Pensacola's airport and a defunct Navy auxiliary air station Check out this story on pnj.com: The Emerald Coast Utilities Authority is suing the manufacturers and sellers of a fire-suppressant foam that allegedly contaminated a portion of the local water supply with highly toxic chemicals.