Middlesex County Beekeepers Association
- Beekeepers helping beekeepers to deal with problems in an increasingly urban county; co-operative buying of glass, sugar and medications. Meeting and membership information.
- http://www.middlesexbeekeepers.org/

Sudbury Valley Trustees
- Information about volunteer group committed to protecting wildlife habitat and ecological integrity of the Sudbury, Assabet, and Concord Rivers.
- http://www.sudburyvalleytrustees.org/

Reservoir List
- Sign up for an email list discussing the reservoir on the border of Arlington and Lexington.
- http://www.cs.umb.edu/~betsys/reservoir.html

East Middlesex Mosquito Control Project
- Provides mosquito control services to participating communities.
- http://www.town.sudbury.ma.us/services/health/emmcp/