Gray Sky Solutions

Welcome to Gray Sky Solutions, an air pollution research consulting firm specializing in particulate matter (PM), visibility issues, and other airborne pollutants.  Managed by Dr. H. Andrew Gray, it is the goal of Gray Sky Solutions to provide the highest quality expertise and service.  Dr. Gray can be reached in San Rafael, CA by telephone at (415) 472-0960.

Gray Sky Solutions is available to assist public and private clients on a wide range of
research problems, including:

Dr. Gray has over 40 years experience performing air pollution research in academic, regulatory and consulting environments.

Gray Sky Solutions looks forward to hearing from you!