Health Watch
Harmful Algae Present
- Do not swim or water ski in areas of algae
- Avoid areas of algae when boating
- Keep animals away
- Do not drink the water
- Clean fish well and discard guts
Calf Creek is located within the Grand Staircase-Escalante National Monument. 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
March 7, 2025: Harmful algae mat monitoring update
BE CAREFUL: Harmful algae mats (benthic cyanobacteria) were observed growing in the water by the Calf Creek Campground and parts of the Lower Calf Creek trail.
If visiting Calf Creek, we recommend:
- Avoid touching or disturbing benthic algae mats (see photo examples here)
- Do not dunk head
- Do not drink water or get it in your mouth
- Do not let pets drink water or eat algae
June 27, 2024: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Harmful algae mats (benthic cyanobacteria) were observed growing in the water by the Calf Creek Campground and parts of the Lower Calf Creek trail.
If visiting, we recommend:
- Avoid touching or disturbing benthic algae mats (see photo examples here)
- Do not dunk head
- Do not drink water or get it in your mouth
- Do not let pets drink water or eat algae
June 24, 2024: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Harmful algae mats (benthic cyanobacteria) were observed growing in the water by the Calf Creek Campground and parts of the Lower Calf Creek trail. These algae mats may produce harmful toxins that make humans and animals sick if ingested.
The Bureau of Land Management has issued a WARNING ADVISORY.
If visiting, we recommend:
- Avoid touching or disturbing benthic algal mats (see photo examples here)
- Do not dunk head
- Do not drink water or get it in your mouth
- Do not let pets drink water or eat algae