About MassDEP's Western Regional Office
MassDEP's Western Regional Office serves 106 communities (listed below) with a majority of its 800,000 residents concentrated in the lower Pioneer Valley.
Additional Resources for About MassDEP's Western Regional Office
File Review / Western Region
For oil or hazardous spills and contaminated sites regulated under MGL Chapter 21E:
You may be able to review these files online from our waste site and reportable release lookup.
Look-up Waste Sites and Reportable Releases
File Review Appointments
You may review the MassDEP Western Region's non-confidential files on Wednesdays 9:00am to 12:00pm and from 1:00pm to 4:00pm in the 5th floor main conference room.
- Wetland File Review: To review wetlands files REQUIRES an appointment in advance. Call 413-784-1100.
- All Other Requests: You are encouraged to fax a completed File Review Request Form for all other file review requests at least one day in advance to Kellie Niemiec at FAX # 413-784-1149.
Western Region Facilities, Projects & Sites of Interest
Western Region Features
The Western Region has the second largest concentration of industry (centered around Springfield, Chicopee and Holyoke) in the state after the greater Boston area, but is the smallest of the DEP regions in terms of population, with a majority of its 800,000 residents concentrated in the lower Pioneer Valley.
A feature unique to the Western Region is its lack of transition zones between older industrial cities and rural farming communities, of which there are many.
The region's major natural features include the Connecticut River, a major source of hydroelectric power; the Quabbin Reservoir, supplying drinking water to 2.1 million people in 46 communities; and the Berkshire mountains. Major river basins in the region include the Chicopee, Connecticut Mainstem, Deerfield, Farmington, Hoosic, Housatonic, Millers, Quinebaug and Westfield.
Cities and Towns in the Western Region