Echo Reservoir is located north of Park City in Summit 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.
Related Links
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. Harmful algal blooms can occur year-round, so know what to look for and always check before recreating.
September 4, 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 sampled: Echo Resort boat launch, near Echo Dam Road junction, and west of 590 N Main Street
August 21, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Echo Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Summit County Health Department has issued a WARNING ADVISORY.
If you visit Echo Reservoir:
- Do not swim or water ski
- Avoid areas of algae when boating
- Clean fish well and discard skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
August 18, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Echo Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Summit County Health Department has issued a WARNING ADVISORY.
If you visit Echo Reservoir:
- Do not swim or water ski
- Avoid areas of algae when boating
- Clean fish well and discard skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
August 13, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom at Echo 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
July 8, 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: Echo Resort boat launch, near Echo Dam Road junction, and west of 590 N Main Street
June 9, 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: Echo Resort boat launch, near Echo Dam Road junction, and west of 590 N Main Street