Harmful algal blooms have been detected at both Echo and Deer Creek reservoirs, prompting health advisories for the Wasatch Back region. The Utah Department of Environmental Quality issued warnings for both water bodies on Sept. 14, 2026, cautioning that algae may be producing dangerous toxins capable of making humans and animals sick.
Echo Reservoir Health Warning
At Echo Reservoir, located north of Park City in Summit County, officials have issued a Warning Advisory due to the presence of harmful algae. The Utah Department of Environmental Quality reported on Sept. 14, 2026, that the bloom is present, and has maintained similar warnings throughout early September.
Visitors to Echo Reservoir are advised to avoid areas where algae is present while boating, kayaking, or paddle boarding. Authorities recommend that people do not swim or water ski in the affected areas, keep animals away from the water, and do not drink the water. Additionally, officials recommend that anyone fishing clean fish well and discard the guts.
While the reservoir has faced recent algal issues, monitoring earlier in the summer showed periods of improvement. On Aug. 26, 2026, monitoring of the Echo Resort Boat Launch indicated that E. coli counts were below recreational thresholds and no visible signs of a harmful algal bloom were detected.
Deer Creek Reservoir Advisories
Deer Creek Reservoir is also under a health advisory following the detection of harmful algae. On Sept. 14, 2026, the Utah Department of Environmental Quality confirmed that a harmful algal bloom is present at the reservoir. This follows a reservoir-wide Health Watch advisory issued on Sept. 10, 2026, after monitoring teams observed visible signs of algae in multiple areas.
Specific precautions for Deer Creek Reservoir include avoiding areas with visible algae while boating and refraining from swimming or water skiing. The state also advises that the water is not safe for pets and that individuals should not drink the water. Similar to the guidance for Echo Reservoir, fishers are advised to clean fish well and discard the skin and guts.
Earlier in the summer, the reservoir saw varying water quality conditions. On July 30, 2026, a Health Watch was issued for Island Park Marina and Rainbow Bay after visible signs of a bloom were observed. By Aug. 25, 2026, monitoring at Island Park Marina, Rainbow Bay, and the South Basin Boat Ramp showed no visible signs of a bloom and E. coli levels were below recreational thresholds.
Deer Creek Park Conditions
The current environmental conditions at Deer Creek State Park reflect significant seasonal changes. As of Sept. 21, 2026, the reservoir's water level was reported at 46.8% capacity, with water temperatures near 71 degrees Fahrenheit.
The park remains open for day use, though water levels have been noted as getting very low. The Island Boat Ramp and the Main Deer Creek Boat Ramp are both currently open. The Island Boat Ramp is described as a shallow ramp suited specifically for shallow haul boats.
Camping and facility availability at Deer Creek includes the Chokecherry, Great Horned Owl, and Fox Den campgrounds, all of which are currently open. During the summer months, which extend through October 20, summer price rates apply, including $20 per day per vehicle for day use.
Decontamination and Fire Rules
In addition to water quality concerns, Utah State Parks continues to manage invasive species through its AIS Decontamination Unit, which is open for the season with hours from 8 a.m. to 6 p.m. daily.
New education requirements have been implemented for boaters. Any boats coming from infested waters—including Lake Powell, Nevada, Colorado, Montana, California, New Mexico, Arizona, Mexico, and Canada—must be decontaminated before entering Deer Creek State Park Reservoir.
Echo Reservoir is also facing environmental restrictions. As of Sept. 5, 2026, Stage 2 fire restrictions were in effect, prohibiting all open fires except for those in approved fire rings or grills at developed campgrounds or day-use areas on public lands that utilize a pressurized running water system. Fires are strictly prohibited on the beach.
Ongoing Monitoring Efforts
The ongoing monitoring of recreational water quality remains a priority for the Utah Department of Environmental Quality. The agency continues to sample sites including the Island Park Marina, Rainbow Bay, and various boat launches to track the presence of harmful algal blooms and waterborne pathogens like E. coli.
For those planning to visit, officials suggest staying informed through official updates from the Utah Department of Environmental Quality or Utah State Parks. Residents can also contact the Utah Poison Control at 800-222-1222 if they have concerns regarding exposure to toxins in the water.
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