- BeWaterwise.com - Water conservation information from the family of regional water agencies, including landscaping, native plant use and watering index.
- Electronic Recyclers International: E-Waste Green - Electronics recycling and e-waste collection events.
- Oiled Wildlife Care Network - Responds to oiled birds washing ashore on beaches from Ventura to Los Angeles. Includes volunteer and research information.
- Salton Basin-Colorado Delta Mothersite - University-maintained resource on the natural, economic, and human aspects of this binational region, including hydrology, Salton Sea ecology and limnology, geothermal resources, Native Americans, and current issues.
- Salton Sea Authority - Governmental agency in Southern California working for environmental restoration of California's largest lake. News and information about the goals and techniques of the restoration project.
- Southern California Biodiesel Users Group - Non-profit, membership organization. Information and events.
- Southern California Botanists - Organization of individuals dedicated to the study and conservation of native plants and plant communities of southern California. Information about the journal, field trips and symposia, and membership.
- Southern California Paleontological Society - A non-profit organization which pledges itself to work in cooperation with scientific institutions and for the preservation of the fossil record.
- Southern California Wetlands Recovery Project Homepage - A partnership of agencies cooperating to restore coastal wetlands and watersheds between Point Conception and the Mexican border. Includes maps, photos and project descriptions.
- The San Gorgonio Wilderness Association - Preserves the San Gorgonio Wilderness and San Bernardino National Forest. Covers history, volunteer program and trail conditions.
