- CERES - An index to environmental information for the county. Extensive reference includes road, weather, and flood conditions, demographics, historical resources, and maps.
- County of Los Angeles County Environmental Health - Public agency controls potentially harmful chemicals, physical or biological agents in the environment. Programs and services include waste management, water quality protection, food safety monitoring, land use planning and vector control.
- Erase the Waste - Campaign to prevent pollution of storm drains and other environmental concerns. Contains media advertisements.
- L.A. County Environmental Resources - Tips on how to help preserve and clean up the environment, from the LA County Department of Public Works.
- Marine Aquarium Society of Los Angeles County - An aquarium society dedicated to helping the marine coral reef hobby and the preservation of coral reefs. Membership and activity information and photos of members' tanks.
- Named Summits of Los Angeles County - List of summits with elevations and locations.
- P.V. Eco - Environmental information about the Palos Verdes Peninsula, including species protection for the Palos Verdes Blue Butterfly.
- Smart Business Recycling - From the Department of Water and Power, this comprehensive guide to recycling links to 350 recyclers. Includes tips to reduce trash and increase efficiency.
