Mona Reservoir Recreational Monitoring

Looks Good!

There are no current health advisories for this water body.

Conditions may change quickly. Check before entering the water and know how to spot a harmful algal bloom.

Learn more about harmful algal blooms

Report a Bloom • (801) 536-4123

Utah Poison Control • (800) 222-1222

Mona Reservoir is located in Mona City at the north end of Juab Valley (Juab 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:

May 12, 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: south of the boat ramp, SE of the dam.