When in doubt, stay out!
Do not drink, swallow, or swim in water that shows signs of a HAB and be sure to keep kids, pets, and livestock away as well.
Because tracking rapidly changing conditions in every body of water is not feasible, we want to inform everyone enough to make their own recreational decisions. We also ask you to help by reporting HABs so that we can respond quickly and hopefully prevent people, pets, and livestock from getting sick.
Report a suspected HAB at www.hab.mt.gov or call 888-849-2938. You may also report a suspected HAB by calling the Gallatin City-County Health Department Environmental Health Services at 406-582-3120.
HAB Fact Sheet