Prepared by the Northwest Clean Air Agency (NWCAA) – Updated Jan. 5, 2026
NWCAA does not recommend or require any particular company to perform testing. This is simply a list of some companies that work in our jurisdiction (listed alphabetically). Anyone may perform the testing, provided the method procedures, QA/QC, and reporting requirements are met. This list does not indicate preferences by the NWCAA nor does it represent a complete listing. If your company would like to be added to this list, please contact our office at 360-428-1617 or send an email to [email protected].
- ACHIEVE ENVIRONMENTAL: 617-447-5701
- AECOM: 206-438-2700
- ALL4 – WASHINGTON: 360-752-9571
- AIREXPERTS INDOOR/OUTDOOR/INDUSTRIAL: 604-341-4847
- AIRPERMITS: 425-788-0120
- ALLIANCE SOURCE TESTING: 855-478-2257
- ANTEC ENVIRONMENTAL SERVICE : 425-888-2202
- ANVIL CORPORATION: 360-671-1450
- BARR ENGINEERING CO.: 952-832-2759
- BISON ENGINEERING, INC.: 406-442-5768
- BLUE SKY ENVIRONMENTAL: 510-525-1261
- C2AIR: 206-352-6552
- CASCADE ENVIRONMENTAL MANAGEMENT: 360-672-0088
- CLEAN AIR ENGINEERING: 253-447-7951
- COAL CREEK ENVIRONMENTAL ASSOCIATES: 425-373-4888
- EARTH TECH: 478-329-8870
- EMISSION TECHNOLOGY INC.: 360-757-1210
- ENVIRONMENTAL RESOURCES MANAGEMENT: 360-647-3900
- ENVIRONMENTAL SCIENCE ASSOCIATES: 206-789-9658
- JACOBS (FORMERLY CH2M HILL): 425-453-5000
- KENNEDY/JENKS CONSULTANTS: 206-753-3400
- KLEINFELDER, INC.: 425-636-7900
- LANDAU ASSOCIATES, INC.: 206-631-8680
- MAUL FOSTER & ALONGI: 503-523-7142
- MONTROSE AIR QUALITY SERVICES: 360-922-6140
- PARAMETRIX: 206-394-3700
- PEAK SUSTAINABILITY GROUP: 360-595-5075
- PROACTIVE ENVIRONMENTAL SOLUTIONS: (800) 820-0052, EXT. 2
- SPRING ENVIRONMENTAL: 509-328-7500
- SLR INTERNATIONAL CORP : 425-402-8800
- TRC: 206-757-3224
- TRINITY CONSULTANTS: 253-867-5600
- WESTON SOLUTIONS, INC.: 206-521-7600
