- Astronomy in Los Angeles - Information primarily regarding area organizations related to space exploration. Includes astrophotos by Vivian Zee.
- CERES: Los Angeles County - California Environmental Resources Evaluation System provides road, weather, and flood conditions, demographics, maps, historical and cultural resources.
- Children's Nature Institute - Dedicated to educating kids to respect and appreciate the natural environment. Includes programs in parks throughout the county.
- LA County: DPH Environmental Health - County programs to identify, prevent, and control harmful environmental factors. Includes inspection results, food safety, housing, pest control, and ocean water quality.
- LA County: DPW Environmental Programs Division - County information includes trash collection, reduce, reuse, recycle, hazardous waste, yard waste, tire recycling, solid waste, illegal dumping, and youth education.
- LA County: Solar Map - Information about the benefits of installing solar photovoltaic to reduce greenhouse gas emissions as well as energy costs. Includes estimator using street address with high resolution imagery.
- LA County: Weed Management Area - Organization brings together landowners and managers in the county to coordinate efforts and expertise against invasive weeds. Includes publications, activities, projects and weeds of concern.
- Los Angeles Regional Water Quality Control Board - State EPA information on water quality and rights regulation, board meetings, laws, funding, watershed management, enforcement, citizen involvement, news and education.
- 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.
- Resource Conservation District of the Santa Monica Mountains - Provides education and leadership in the creation of programs to conserve and enhance the natural resources of the district and identifies natural resource issues. Includes news and program information.
- San Gabriel Valley Energy Wise - Offers resources and practical assistance to increase energy efficiency and conservation. Includes information for municipal, business and residential users.
- Santa Monica Bay Restoration Commission - Addresses critical problems such as storm water and urban runoff pollution, habitat loss and degradation, and public health risks. Includes news, plans, programs and projects.
- Santa Monica Mountains Trails Council - Non-profit organization dedicated to establishing and maintaining the public trail system throughout the Santa Monica Mountains. Includes history, news and events.
- Smart Business Recycling - From the Department of Water and Power, this guide to recycling links to 350 recyclers. Includes tips to reduce trash and increase efficiency.
- South Bay Environmental Services Center - Clearinghouse for energy-efficiency information and resources. Serves the South Bay region, helping save water, energy, money, and the environment.
- TRI Products - Electronic waste recycling. Includes service area and information on no-cost pickup.
