Highland Glen Reservoir is south of Highland’s Lone Peak High School in Utah 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
November 12, 2025: Recreational water quality monitoring update
Recreational water quality monitoring has ended for the season. Monitoring will resume in June or July 2026. Harmful algal blooms can occur year-round, so know what to look for and always check before recreating.
October 16, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: A harmful algal bloom is present at Highland Glen Pond. Algae in the water may be producing dangerous toxins that can make humans and animals sick.
Water conditions at Highland Glen Pond fall within State guidance for 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 skin and guts
- Keep animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
October 10, 2025: Harmful algal bloom (HAB) monitoring update
BE CAREFUL: Our monitoring team saw visible signs of a harmful algal bloom at Highland Glen 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 animals away
- Don’t drink the water
- Know how to recognize a harmful algal bloom
August 20, 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.
Site sampled: South end of reservoir
August 20, 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.
Site sampled: South end of reservoir
August 4, 2025: Waterborne pathogen (E. coli) monitoring update
BE CAREFUL: E. coli counts at Highland Glen Reservoir are above safe recreational thresholds. Sampling suggests that there is a high likelihood that harmful bacteria and/or viruses are present in the water. Exposure to this water may make humans sick.
If you visit Highland Glen Reservoir:
- Do not dunk head
- Do not get water in your mouth
- Wash hands with soap and water after being in water
- Learn more about waterborne pathogens
July 15, 2025: Waterborne pathogen (E. coli) monitoring update
BE CAREFUL: E. coli counts at Highland Glen Reservoir are above safe recreational thresholds. Sampling suggests that there is a high likelihood that harmful bacteria and/or viruses are present in the water. Exposure to this water may make humans sick.
If you visit Highland Glen Reservoir:
- Do not dunk head
- Do not get water in your mouth
- Wash hands with soap and water after being in water
- Learn more about waterborne pathogens
June 30, 2025: Waterborne pathogen (E. coli) monitoring update
BE CAREFUL: E. coli counts at Highland Glen Reservoir are above safe recreational thresholds. Sampling suggests that there is a high likelihood that harmful bacteria and/or viruses are present in the water. Exposure to this water may make humans sick.
If you visit Highland Glen Reservoir:
- Do not dunk head
- Do not get water in your mouth
- Wash hands with soap and water after being in water
- Learn more about waterborne pathogens
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.
Site sampled: South end of reservoir