Division of Water Quality
Otter Creek Reservoir Recreational Monitoring
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.
Updates
October 31, 2026: Recreational water quality monitoring has ended for the season
Recreational water quality monitoring for this waterbody has ended for the season. Routine monitoring will resume in June 2027. Harmful algal blooms can persist in colder weather, so know what to look for and always check water conditions before recreating. When in doubt, stay out!
If you are experiencing an algae-related illness, call Utah Poison Control at 800-222-1222.
If you suspect your dog has been exposed to harmful algae, contact your veterinarian immediately.
October 1, 2026: 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: Beach Access
August 17, 2026: 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.
If you visit the area:
- 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 14, 2026: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our crew has observed a potentially harmful algal bloom at Otter Creek 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 pets and livestock away from the water and shoreline
- Don't drink the water
- Know how to recognize a harmful algal bloom
Site(s) sampled: Beach Access, Tamarisk Point Campground
July 29, 2026: 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(s) sampled: Beach Access, Upper Dam
July 15, 2026: 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: Beach Access, Tamarisk Point Campground
June 16, 2026: 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: Beach Access
June 12, 2026: 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(s) sampled: Beach Access