Otter Creek Reservoir is located in Piute County near Antimony. 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.
October 7, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Otter Creek Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Central Utah 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
September 16, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Otter Creek Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Central Utah 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
August 28, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Otter Creek Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Central Utah 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
August 22, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Otter Creek Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Central Utah 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
July 30, 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: Beach access, Tamarisk Point, Senior Citizen Point
July 16, 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: Beach access
June 24, 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: State Park Beach, Tamarisk Point, Senior Citizen Point
June 9, 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: Beach access
May 20, 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: Beach access