Baker Reservoir is located approximately 25 miles northwest of St. George in Washington 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.
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Updates:
February 23, 2026: Recreational water quality monitoring update
Recreational water quality monitoring has ended for the season. Harmful algal blooms can occur year-round, so know what to look for and always check before recreating.
August 19, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Baker Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
The Bureau of Land Management has issued a WARNING ADVISORY.
If you visit Baker 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
July 22, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Baker Reservoir. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
The Bureau of Land Management has issued a WARNING ADVISORY.
If you visit Baker 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
July 15, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom at Baker 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