Program Overview
Nonpoint source pollution can cause harmful effects such as harmful algal blooms (HABs), which are an overgrowth of cyanobacteria. Some types of cyanobacteria can produce toxins that can pose serious health risks to humans and animals if toxins are contacted or ingested. HABs typically occur on lakes and reservoirs when water conditions (e.g., light, temperature, and nutrient levels) promote growth; typically, in summer and fall in Montana. If in doubt, stay out.
HABs Contacts
Water Quality Specialist
Hannah Riedl (406) 444-0549
Think you see a HAB?
- Submit a Report Online
- Call 1-888-849-2938; or
- Email HAB@mt.gov
Think you or an animal have been exposed to a HAB?
- Talk to your health provider or veterinarian
- Call poison control 1-800-222-1222
- Call animal poison control 1-888-426-4435 (fee based)
