Compliance. Solved.


Source Emissions Testing

AQS has extensive experience in conducting manual and instrumental source emissions tests for industrial facilities and utilities. AQS conforms with ASTM D7036-04: Standard Practice for Competence of Air Emission Testing Bodies (AETB) for those emission…


Continuous Emission Monitoring Systems (CEMS)Continuous Opacity Monitoring Systems (COMS) Air Quality Services has over 75 years of collective dedicated experience in providing CEMS and COMS services to industrial facilities and electric utilities. We offer a…

Ambient Air Monitoring

AQS provides comprehensive ambient air monitoring services to both industrial and utility clients. These projects are typically fulfilling pre-construction monitoring or PSD permitting requirements. Our ambient data are subjected to the quality assurance…
consulting permitting article

Consulting / Permitting

AQS provides consulting services to ensure that our clients establish and maintain air-related environmental compliance. Our experience, expertise, and innovative personnel provide our clients with the resources necessary to navigate the complex regulatory…

Air Dispersion Modeling

AQS has performed many air dispersion modeling studies in support of air permit applications and to locate ambient monitoring sites. We closely follow developments in USEPA and state modeling guidelines. Our staff is well versed in the use of the AERMOD…

Mercury Testing, Studies & Related Services

Air Quality Services' comprehensive mercury services provide accurate, low detection level, quality-assured data using EPA validated test methods. These data enable our clients to make informed decisions regarding the performance of their mercury control…

Corporate Headquarters:

10441 Hedden Road
Evansville, Indiana
(812) 452-4785