California Landslide Monitoring, Hwy 50
- USGS project to monitor active and potential landslides above Highway 50, about 25 miles east of Placerville. Site includes photos, descriptions, historical data, real-time graphs of current conditions.
- http://landslides.usgs.gov/monitoring/hwy50/

Pine Hill Preserve
- Protected habitat for rare plants that grow in gabbro soils. Site provides map, descriptions of plants, history of the preserve, plans.
- http://www.pinehillpreserve.org/

El Dorado Chapter, California Native Plant Society
- Non-profit organization of amateurs and professionals with a common interest in the area's native plants.
- http://www.eldoradocnps.org/

El Dorado County Environmental Management Department
- Public agency responsible for State-mandated environmental regulation, enforcement, and waste management programs. Tasks include water quality protection, food safety monitoring, land use planning and vector control.
- http://www.co.el-dorado.ca.us/emd/

American River Conservancy
- Conservation organization that protects habitat along the South Fork of the American River and in other parts of the County. Information about education, land projects, volunteer opportunities, and their Nature Center in Coloma.
- http://www.arconservancy.org/

South Fork American River Basin
- Topographic map of watershed, statistical data, links to related sites.
- http://www.ice.ucdavis.edu/newcara/basin.asp?cara_id=61

El Dorado Viticultural Area
- The Wine Institute's definition of this viticultural area, with reference to U.S.G.S. maps.
- http://wineinstitute.org/fedlaw/regs/27cfr_part09/9_061.htm

El Dorado Irrigation District FERC Project 184 Relicensing
- Documents associated with the hydro-electric relicensing project, primarily located in the El Dorado National Forest.
- http://www.project184.com

Asbestos Concentrations
- Table of measured ambient asbestos concentrations at locations throughout El Dorado County, including freshwater storage, waste water, schools, residences.
- http://www.arb.ca.gov/toxics/asbestos/table1p1.htm

Place Names
- List of place names in El Dorado County, with latitude, longitude, and elevation data for most.
- http://www.calsign.com/mining/eldorado.htm

CERES - El Dorado County
- An index to environmental information for the county. Extensive reference includes road, weather, and flood conditions, demographics, historical resources, maps.
- http://ceres.ca.gov/geo_area/counties/El_Dorado/

UC Davis Cooperative Extension Extension
- Agricultural extension information for El Dorado County. Links and information on natural resources, farming, gardening, viticulture, home economics, and 4-H.
- http://ceeldorado.ucdavis.edu/