PFAS-credentialed compliance consultants that serve Washington. Listings include both firms headquartered in Washington and out-of-state firms with active Washington project coverage. See the Washington compliance page for contamination data and regulatory deadlines that drive this work.
Top-5 global engineering firm with deep PFAS practice — treatment system design-build, AFFF investigation at DOD installations, and regulatory consulting.
Employee-owned environmental engineering firm specializing in water and wastewater. PFAS treatability studies and full-scale design for U.S. utilities.
Major federal contractor for DOD AFFF-impact investigation, IRP/MMRP site work, and PFAS remediation under USACE and AFCEC IDIQs.
Largest U.S. firm exclusively dedicated to water/wastewater engineering. Significant PFAS pilot and design work for California and Western U.S. utilities.
West Coast water-focused engineering firm. PFAS treatment design and pilot work for California and Pacific Northwest municipalities.