The air quality permitting process can be quite complicated and time-consuming due to the arduous and rapidly changing air quality regulatory requirements and the requisite emission source and site-specific analyses required. Zephyr offers to meet our clients’ needs with broad and in-depth knowledge of their business and production processes, coupled with thorough knowledge of regulations and local regulatory requirements to help solve today’s air quality challenges.


At Zephyr, our client-focused problem solving approach has been highly successful in providing environmental assistance in the siting and permitting needs for new and modified industrial facilities. We have extensive experience working cooperatively and collaboratively with our client’s environmental, design, construction, operations and licensor project team members as well as regulatory agency staff to develop effective resolution of the environmental technical issues that inevitably arise during environmental permitting.

Our engineers and scientists, many with over 20 years of air quality experience, have prepared more than 2,000 approved permit applications and registrations.

Services include:

  • State Minor New Source Review (NSR) permit applications and registrations
  • Federal NSR permit applicability and applications
    – Prevention of Significant Deterioration (PSD)
    – Nonattainment permit applications
  • Federal Operating Permit (Title V) applications
  • Permitting Strategies
  • Feasibility Evaluations
Air Permitting Project Spotlights