Causey Reservoir is located on the south fork of the Ogden River near Ogden and Huntsville. DEQ’s recreational water quality monitoring checks for two health concerns: Harmful Algal Blooms (HABs) and Waterborne Pathogens (E. coli). Find the most recent Causey Reservoir monitoring information below. Updates: July 29, 2025: Waterborne pathogen (E. coli) monitoring update GOOD…