Alliance for Sustainable Communities, Lehigh Valley
- Group of individuals, organizations, and businesses working towards sustainable development in the area. Overview of its working groups, community activities, and accomplishments.
- http://www.sustainlv.org/

Sierra Club, Lehigh Valley Group
- Group of local citizens interested in protecting and preserving the environment of the Lehigh Valley presents its committees and activities, a summary of local issues, and a photo gallery.
- http://pennsylvania.sierraclub.org/lv/

Lehigh Valley Water Suppliers, Inc.
- Group of seven public water suppliers offer information about water and its usage for kids and adults, links to the individual suppliers as well as external resources.
- http://www.lvwater.org/

Lehigh Valley Computer Group
- Education-oriented association presents its event calendar, archive of newsletters, information about the special interest groups, and free downloads.
- http://www.lvcg.org/

Lehigh Valley Amateur Astronomical Society
- The LVAAS is a public-oriented nonprofit educational organization dedicated to serving the interests of the community in astronomy and related fields. Includes information on the observatory.
- http://www.lvaas.org/

Lehigh Valley Audubon Society
- Regular birding and occasional other natural history field trips are held throughout the year. Meetings are held on the second Tuesday of each month.
- http://www.lehigh.edu/~bcm0/lvas.html