East Canyon Reservoir is approximately 35 miles from Salt Lake along I-80 and S.R. 65. 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.
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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
Southern end:
Warning Advisory
October 7, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Taylor Hollow and Big Rock Campground at the southern end of East Canyon Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Weber-Morgan Health Department has issued a WARNING ADVISORY.
If you visit Taylor Hollow or Big Rock Campground:
- 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
Northern end
Health Watch
October 7, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Harmful algae was present in the northern end of East Canyon Reservoir, but below advisory thresholds. Avoid any visible algae when recreating.
If you visit the northern end of the reservoir:
- Kayaking is OK, but avoid areas of algae
- Do not swim
- Clean fish well and discard guts
- Keep animals away from areas of green scum
- Don’t drink the water
- Know how to recognize a harmful algal bloom
Taylor Hollow, Big Rock Campground:
Warning Advisory
September 30, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Taylor Hollow and Big Rock Campground. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Weber-Morgan Health Department has issued a WARNING ADVISORY.
If you visit Taylor Hollow or Big Rock Campground:
- 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
Other areas of East Canyon Reservoir:
Looks Good
September 30, 2025:Monitoring for harmful algae
Other Areas of East Canyon Reservoir: Looks Good
August 23, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom. Learn more about harmful algal blooms.
Sites visited: Big Rock Campground day-use area, Taylor Hollow, Pratt Group Pavilion
August 18, 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.
Sites sampled: Taylor Hollow, Big Rock Campground day-use area, Pratt group pavilion
August 6, 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.
Sites sampled: Big Rock Campground day-use area, Pratt group pavilion
July 31, 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.
Sites sampled: Big Rock Campground day-use area, Pratt group pavilion
July 14, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom. Learn more about harmful algal blooms.
Sites visited: Big Rock Campground day-use area, Taylor Hollow, Pratt Group Pavilion
June 19, 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.
Siteds sampled: Big Rock Campground, Taylor Hollow, State Park main beach
June 19, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom. Learn more about harmful algal blooms.
Site(s) visited: Big Rock Campground, Taylor Hollow, State Park main beach