Welcome to the Tewhey Associates Web Site. We would like to introduce you to our firm and provide you with information which will help you to understand and solve your environmental problems. We all need to have a full understanding of the complex environmental issues which face us in order to make informed decisions. One of Tewhey Associates' strengths is our ability and commitment to present complex technical issues in ways that are easily understood.

We appreciate your interest in our Web Site and hope it has been informative for you. If you have any questions which you would like to discuss with us, please email us.

We look forward to speaking with you.

John & Gloria


The firm of Tewhey Associates provides technical consultation and services in the fields of hydrogeology, geochemistry and geology as applied to hazardous waste sites, landfills and development sites. Our staff is small, but highly specialized.

We offer our clients:

Our size provides our clients with the direct benefit of our senior experience and technical expertise. 


We measure our growth in terms of meeting increasingly difficult technical challenges, not in the size of our staff or the number of our offices. Success for us is solving a problem in a professional manner and delivering a report on time.

Our goal is to provide practical, cost-effective solutions to environmental problems.


Representative Client List

Central Maine Power Company, Augusta, ME

The Dunham Group, Portland, ME
Town of Freeport, ME
Merrill Industries, Inc., Portland, ME
City of Portland, ME
City of Westbrook, ME

Woodard & Curran, Portland, ME

Key Personnel

John D. Tewhey, President
B.A., Chemistry and Geology, Colby College
M.S., Geology, University of South Carolina
Ph.D., Geochemistry, Brown University
Professional Hydrogeologist, AIH
Certified Geologist in Maine and California


Professional Memberships

Contact Information

Tewhey Associates
P.O. Box 238
Gorham, ME 04038-0238
(207) 839-4261 - Voice
(207) 839-3834 - Fax