CERES - Contra Costa County: An index to environmental information for the county. Extensive 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.
Friends of Pinole Creek Watershed: Volunteer organization focuses on improving environmental quality in the area around the creek. Includes details on current projects.