Porcupine Reservoir is located approximately 4 miles east of Avon in Cache 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 Porcupine Reservoir monitoring information below.
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Updates:
June 25, 2025: Waterborne pathogen (E. coli) and HAB monitoring update
GOOD NEWS: E. coli counts were measured below recreational thresholds and our monitoring team did not see any visible signs of a harmful algal bloom.
Site sampled: Northeast beach