Stack Testing and Source Testing Specialists

Environmental Source Samplers, Inc. (ESS) has been providing air emissions testing, stack testing, source testing, and environmental air services since 1979. Our seasoned staff of professionals has over 50 combined years of accumulated industry knowledge and experience in air testing emissions. We will help you design and execute an accurate emissions testing program with guaranteed valid test results.

Headquartered in Wilmington, North Carolina, ESS is the air quality expert.  We regularly provide stack testing for air quality compliance and air quality consulting services across the United States and internationally. Our main focus is to consistently meet and exceed our clients’ expectations, by providing accurate, reliable emissions tests fast. By choosing ESS you can be sure you are selecting one of the most experienced air quality testing and environmental consulting firms in the nation.

ESS prides itself in providing cost-effective air emissions tests without sacrificing quality. The ESS environmental engineering staff is dedicated to handling air quality jobs of all sizes, with varying degrees of complexities. Whether your needs include; source testing, FTIR spectroscopy, industrial hygiene monitoring, CEMS testing, air dispersion modeling, or mercury monitoring, we can help.



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Our Accreditations

  • NELAC Accredited On-Site Laboratory
  • QSTI Certified Project Managers
  • ASTM Quality Assurance Program
  • Excellent Safety Program- resulting in no reportable incidents since 1979


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Contact us to request a quote or to view our Statement of Qualifications (SOQ)