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Updates:
November 1, 2024: Harmful algal bloom (HAB) monitoring update
Recreational water quality monitoring has ended for the season. Monitoring will resume in summer 2025. A harmful algal bloom may still be present at this waterbody. Know what to look for and check before recreating.
October 17, 2024: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Conditions were looking much improved. Only low levels of harmful algae were observed. Holmes Creek Reservoir will continue to be visually monitored for harmful algae and advisory signs removed if the bloom remains dispersed.
Davis County 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 guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
September 27, 2024: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Holmes Creek Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Davis County 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 guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
September 25, 2024: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom at Holmes 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 guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
July 31, 2024: Waterborne pathogen (E. coli) monitoring update
OK, but be careful: There may be areas of harmful algae mats present at Holmes Reservoir. Know how to recognize harmful algae and avoid playing or swimming in areas of visible algae.
June 20, 2024: Waterborne pathogen (E. coli) monitoring update
GOOD NEWS: E. coli counts were measured below Utah Department of Health recreational thresholds. Sampling suggests that the water is safe from harmful bacteria and viruses.
Site sampled: Near southeast end of dam
May 31, 2024: Waterborne pathogen (E. coli) monitoring update
GOOD NEWS: E. coli counts were measured below Utah Department of Health recreational thresholds. Sampling suggests that the water is safe from harmful bacteria and viruses.
Site sampled: Near southeast end of dam