Utah Lake & our monitoring
Related Links
- We check Utah Lake for two health concerns: harmful algal blooms (HABs) and waterborne pathogens (E. coli).
- Find updates on this page below and on the map (the map contains the most updated information).
- Utah Lake can be accessed from many locations in Utah County.
- The state park is three miles west of I-15 from exit 268 in Provo.
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 20, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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
October 7, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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 26, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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 3, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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
August 18, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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
August 12, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present lakewide at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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
Utah Lake:
Warning Advisory
July 31, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Utah Lake. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Utah Lake fall within State guidance for a WARNING ADVISORY.
If you visit the lake:
- 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
Utah Lake:
Health Watch
July 28, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom lake-wide at Utah Lake. 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
Provo Bay, Lincoln Marina and beach, Sandy Beach, American Fork Marina, Open Water on East Side of Lake:
Health Watch
July 23, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in the south end of the lake, American Fork Marina, and open water along the east side of the lake. Algae in the water is producing dangerous toxins that can make humans and animals sick.
If you visit:
- 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
Provo Bay, Lincoln Marina and beach, Sandy Beach, American Fork Marina, Open Water around Lindon, and Open Water around Utah Lake State Park:
Health Watch
July 18, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in the south end of the lake and open water around Utah Lake State Park. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
If you visit:
- 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
Other areas of Utah Lake:
Looks Good
July 18, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom at other sites visited. Learn more about harmful algal blooms.
Provo Bay and Lincoln Marina and beach, Sandy Beach:
Health Watch
July 15, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in Provo Bay and Lincoln Marina and beach. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
If you visit:
- 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
Provo Bay and Lincoln Marina and beach, Sandy Beach, American Fork Beach:
Health Watch
July 11, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in Provo Bay and Lincoln Marina and beach. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
If you visit:
- 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
Other areas of Utah Lake:
Looks Good
July 10, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom at other sites visited. Learn more about harmful algal blooms.
Site(s) visited: Utah Lake State Park Marina, Lindon Marina
Provo Bay and Lincoln Marina and beach:
Health Watch
June 19, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in Provo Bay and Lincoln Marina and beach. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
If you visit:
- 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
Other areas of Utah Lake:
Looks Good
June 18, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom at other sites visited. Learn more about harmful algal blooms.
Site(s) visited: Utah Lake State Park Marina, Lindon Marina, American Fork Beach, Saratoga Springs Marina
Provo Bay:
Health Watch
May 28, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present in Provo Bay. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
If you visit Provo Bay:
- 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
Other areas of Utah Lake:
Looks Good
May 21, 2025: Harmful algal bloom (HAB) monitoring update
GOOD NEWS: Our monitoring team did not see any visible signs of a harmful algal bloom at other sites visited. Learn more about harmful algal blooms.
Site(s) visited: Lincoln Marina and beach, Utah Lake State Park Marina, Lindon Marina, American Fork Beach, Saratoga Springs Marina
May 21, 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: Lincoln Marina (beach), Lincoln beach N of Lincoln Marina, S of Lincoln Marina, shore NE of Spanish Fork River Outlet, Utah Lake State Park Marina W, Lindon Marina Beach NE of launch ramps, American Fork Beach, Saratoga Springs Marina boat ramp, and Saratoga Springs Marina Picnic Area