Tag: Matt Warner Reservoir

Matt Warner Reservoir is located on Diamond Mountain, north of Vernal in Uintah County. DEQ’s recreational water quality monitoring checks for two health concerns: Harmful Algal Blooms (HABs) and Waterborne Pathogens (E. coli). Find the most recent monitoring information below. Updates: October 10, 2025: Harmful algal bloom (HAB) monitoring update BE CAREFUL: A harmful algal…