• Regional: North America: United States: California: Science and Environment  (81)

• CERES - Contra Costa County - An index to environmental information for the county. Includes reference includes road, weather, and flood conditions, demographics, historical resources, maps.
• Contra Costa Environmental Health Department - Programs and services include waste management, water quality protection, food safety monitoring, land use planning and vector control.
• Recycle More - The West Contra Costa Integrated Waste Management Authority. Site contains information on solid waste disposal, waste reduction, reuse, recycling, composting and hazardous waste for residents of western Contra Costa County.

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