Birds of the Imperial Valley
- Birdwatching guide with photos of many species found locally.
- http://www.imperial.cc.ca.us/birds/

New River Wetlands Project
- Pilot study investigating the potential for constructed wetlands to improve water quality in the river and the Salton Sea. Photos, monitoring data, and other information.
- http://www.newriverwetlands.com/

CERES - Imperial 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/Imperial/