The Greenwich Land Trust
- Independent non-profit corporation that manages over 575 acres of open space at 117 sites.
- http://www.gltrust.org/

Audubon Greenwich
- Information on flora and fauna, programs, volunteering, research and what's to be found at the center.
- http://greenwich.center.audubon.org/

Friends of Greenwich Point
- History of the Point plus information on programs, events, board of directors and membership.
- http://www.friendsofgreenwichpoint.org/

Greenwich Conservation Commission
- News, membership list, meeting information and conservation notices.
- http://www.greenwichct.org/ConservationCommission/ConservationCommission.asp

Department of Inland Wetlands and Watercourses
- Municipal department provides news, meeting schedule and agendas, forms required for review and general information.
- http://www.greenwichct.org/InlandsWetlands/InlandsWetlands.asp

Western Long Island Sound Station
- Marine environmental montoring information such as surface and bottom water quality, temperature and salinity.
- http://www.mysound.uconn.edu/wlisgw_stn.html

Indian Harbor Yacht Club and MY Sound
- Description of the club's participation in the MY Sound project, which monitors water quality in Long Island Sound.
- http://www.indianharboryc.com/mysound.htm