SACReD
- South Arundel Citizens for Responsible Development is a nonprofit, tax-exempt organization working toward a sustainable South Anne Arundel County community. Find news, history and how you can help.
- http://www.sacred-online.org/

The Severn Riverkeeper
- Monitors the Severn River by boat and plane. Includes information on programs and resources.
- http://www.severnriverkeeper.org/

Sierra Club, Anne Arundel County Group, Maryland Chapter
- Offers a listing of events, happenings, meetings, and services, including donations and volunteering.
- http://maryland.sierraclub.org/annearundel/

Anne Arundel Soil Conservation District
- Information and resources for environmental conservation practices and projects in Anne Arundel County.
- http://www.annearundelscd.org/

Severn River Association
- Umbrella organization focused on environmental protection. Includes list of member organizations and weekly fecal coliform (water contamination) counts taken at various locations.
- http://www.severnriver.org/