PFAS-credentialed compliance consultants that serve Illinois. Listings include both firms headquartered in Illinois and out-of-state firms with active Illinois project coverage. See the Illinois compliance page for contamination data and regulatory deadlines that drive this work.
Municipal water engineering firm with Illinois offices including Crystal Lake, Chicago, Naperville and Peoria, and five Florida offices. Publishes a PFAS guide for water utilities.
Engineering and environmental firm founded in Freeport, Illinois, with seven Illinois offices and three in Iowa. Offers PFAS site assessment, water treatment design and Illinois EPA compliance support...
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...
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...
Public-health and water testing organization headquartered in Ann Arbor. PFAS lab services plus NSF/ANSI 53 and 58 certification of treatment devices for PFOA/PFOS reduction.
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...
International environmental consultancy with a U.S. PFAS practice covering source investigations, ESA due diligence, regulatory navigation, and treatability evaluations. Active across MN-based industr...
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...
Wisconsin-based municipal engineering firm specializing in water and wastewater with active PFAS treatment evaluations and MCL compliance planning for Wisconsin and Upper Midwest utilities.
Employee-owned environmental consulting and engineering firm. PFAS UCMR sampling support, AFFF site investigation, and compliance planning for water systems and DOD clients.
Specialty EHS consultancy with a well-known PFAS practice covering source investigations, litigation support, fate and transport, and treatability studies. Frequently retained by industrial and Fortun...
Gainesville, Florida environmental consulting firm with offices in Orlando, Tallahassee and Tampa and a Chicago-area office in Lombard, Illinois. Conducts PFAS site investigations and develops treatme...
St. Louis engineering firm with Illinois offices in Chicago, Edwardsville, Marion and O'Fallon. Prepared the PFAS remediation study for Portageville, Missouri's public water system, which received eme...
Global engineering and EPC firm with PFAS treatment design, site investigation, and regulatory advisory work across federal and municipal sectors.
East Coast engineering and environmental firm. PFAS site investigation and remediation work across Pennsylvania, New Jersey, and New York.
Global engineering consultancy with U.S. water practice supporting PFAS treatment evaluations, pilot studies, and UCMR-5 compliance for municipal utilities. Active in northeastern U.S. PFAS treatment ...
Materials characterization and environmental forensics lab offering PFAS analysis in environmental and industrial matrices, including consumer-product and AFFF source attribution work. Supports litiga...
Environmental and management consulting firm with a heavy New Jersey and New York footprint. Significant PFAS site characterization and litigation-support work.
Wisconsin municipal engineering firm. Water and wastewater system planning, PFAS treatment evaluations, and DNR-coordinated compliance work.
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 ...
Employee-owned environmental and engineering firm with a dedicated PFAS practice covering source investigations, fate and transport modeling, treatability studies, and ITRC-guidance-aligned site chara...
EHS consulting firm offering PFAS regulatory compliance, TSCA reporting (PFAS Section 8(a)(7)), air emissions assessment, and ITRC-guidance support. Major presence across TX, FL, and the Southeast.
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.
27 Illinois water systems tested above the EPA limit for PFOA or PFOS, 13 of them on average. The Illinois market brief (PDF plus a workbook with operator contacts) is a one-time $149 download. See a sample →