PFAS-credentialed treatment system designers & installers 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.
Process equipment manufacturer providing GAC contactors, IX vessels, and clarification systems used in municipal PFAS treatment trains. Designs and fabricates pressure vessels and underdrain systems f...