PFAS consulting in Washington

Environmental science and engineering firm specializing in sediment and water resources with growing PFAS practice covering site investigation, fate-and-transport modeling, and remedial design for PFA...

Seattle-based geotechnical and environmental firm with Fairbanks and Anchorage offices. Evaluates PFAS at Alaska DOT&PF airports and investigated PFAS at the Fairbanks Regional Fire Training Facility,...

Top-5 global engineering firm with deep PFAS practice — treatment system design-build, AFFF investigation at DOD installations, and regulatory consulting.

Employee-owned engineering and environmental consulting firm with a dedicated PFAS practice; particularly active on Minnesota industrial and municipal PFAS sites including 3M-area work and treatment s...

Nonprofit applied science organization developing PFAS destruction technologies including supercritical water oxidation (SCWO) and PFAS Annihilator systems. Conducts PFAS treatability studies and fiel...

Employee-owned environmental engineering firm specializing in water and wastewater. PFAS treatability studies and full-scale design for U.S. utilities.

Employee-owned engineering and construction firm with PFAS treatment design, AFFF replacement programs at airports and military bases, and PFAS destruction technology evaluation. Active prime on DoD A...

Privately-held engineering firm with a deep municipal water practice. PFAS treatment evaluations, GAC and IX pilot studies, EC-SDC grant application support.

Environmental engineering and applied science firm widely recognized as a PFAS R&D thought leader. Leading work on in-situ treatment, colloidal activated carbon, and AFFF site characterization.

Water-focused engineering firm known nationally for PFAS treatment research and design. Led pilot work on GAC, IX, and RO for major utilities including OCWD and NYC DEP.

Employee-owned A/E firm with a national water practice that has designed PFAS treatment systems (GAC, IX, RO) for multiple U.S. utilities. Active in UCMR-5 sampling support and EPA MCL compliance plan...

Major federal contractor for DOD AFFF-impact investigation, IRP/MMRP site work, and PFAS remediation under USACE and AFCEC IDIQs.

La Grande, Oregon civil engineering firm with offices in Hermiston, Redmond and Enterprise. Prepared the City of Hermiston's PFAS Mitigation Feasibility Study, adopted in August 2026 as the city's $26...

National environmental and water resources consultant with PFAS site assessment, soil/groundwater remediation, and treatment system design services. Provides PFAS compliance support for industrial cli...

Largest U.S. firm exclusively dedicated to water/wastewater engineering. Significant PFAS pilot and design work for California and Western U.S. utilities.

Employee-owned environmental consulting and engineering firm. PFAS UCMR sampling support, AFFF site investigation, and compliance planning for water systems and DOD clients.

Global engineering and EPC firm with PFAS treatment design, site investigation, and regulatory advisory work across federal and municipal sectors.

West Coast water-focused engineering firm. PFAS treatment design and pilot work for California and Pacific Northwest municipalities.

East Coast engineering and environmental firm. PFAS site investigation and remediation work across Pennsylvania, New Jersey, and New York.

Federal services contractor with major DoD environmental remediation portfolio including PFAS investigation, remedial action, and AFFF transition support at Air Force, Navy, and Army installations. Ho...

Employee-owned national geotechnical and environmental consulting firm with PFAS site assessment, Phase II investigation, and remedial design services. Active across DoD, industrial, and airport PFAS ...

WSP acquired Wood's E&IS practice in 2022. Global PFAS investigation, AFFF site work, and treatment evaluation capabilities across federal and private-sector clients.