Adams Reservoir Recreational Water Quality Monitoring - Utah Department of Environmental Quality

Andy Adams Reservoir is a community fishery located at 1799 E. 1000 N. in Layton (Davis 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 Adams Reservoir monitoring information below.

Updates

November 1, 2025: Recreational water quality monitoring update

Recreational water quality monitoring has ended for the season. Monitoring will resume in June or July 2026. A harmful algal bloom may still be present at this waterbody. Know what to look for and always check before recreating.

July 18, 2025: Harmful algal bloom (HAB) monitoring update

BE CAREFUL: A harmful algal bloom is present at Adams Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.

Davis County Health Department has issued a WARNING ADVISORY.

If you visit the reservoir:

Do not swim or water ski
Avoid areas of algae when boating
Clean fish well and discard guts
Keep animals away
Don’t drink the water
Know how to recognize a harmful algal bloom

July 16, 2025: Harmful algal bloom (HAB) monitoring update

BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom at Adams Reservoir. There could be algae in the water producing dangerous toxins. We collected samples and results are pending. Check back here for updates.

In the meantime we recommend:

Do not swim or water ski in areas of algae
Avoid areas of algae when boating
Clean fish well and discard guts
Keep animals away
Don’t drink the water
Know how to recognize a harmful algal bloom

June 30, 2025: Waterborne pathogen (E. coli) monitoring update

GOOD NEWS: E. coli counts were measured below recreational thresholds. Sampling suggests that the water is safe from harmful bacteria and viruses.

Site sampled: Adams Reservoir

May 28, 2025: Waterborne pathogen (E. coli) monitoring update