Montana
Montana DEQ warns of algal blooms ahead of holiday weekend
The Montana Department of Environmental Quality is reminding the public to check the harmful algal bloom map ahead of the holiday weekend.
HABs can discharge toxins that may be harmful to humans and animals.
If you suspect a HAB, stay out of the water, including your furry friends. Don’t allow dogs to drink from the water or lick their fur if you suspect they came in contact with affected water.
Officials say avoid swimming in areas where the water looks discolored and resembles spilled paint, pea soup or grass clippings.
A list of reported HABs in the past week was provided by the Montana DEQ:
- Lake Helena Causeway and Fishing Access Site, Lewis & Clark County (confirmed 6/25/2026)
- Canyon Ferry Reservoir at Duck Creek Campground, Broadwater County (confirmed 6/24/2026)
- Cooney Reservoir, Carbon County (confirmed 6/23/2026)
The Montana Department of Environmental Quality posted the following on Facebook: