“Cyanobacteria, or blue-green algae, blooms in a New Hampshire Lake.” Credit: New Hampshire Department of Environmental Services
If you see a bloom, you should:
1) Get out of the water, and rinse off thoroughly with soap and water. If your pet has been exposed, immediately notify your veterinarian.
2) If safe and easy to do so, take a picture of the bloom. Note the time and location as precisely as possible (name the nearest identifiable marker, such as street address or obvious feature).
3) Call your local state government (for NH, the number is (603) 848-8094) to report the bloom. Follow the directions listed in the voicemail if no one picks up.
4) If possible, post a sign notifying others of the bloom.
5) Alert neighbors and other commercial properties (like campgrounds) of the possible bloom and location.
6) Finally, please stay out of the water until the bloom has resolved and/or local government gives the OK to resume water activities. Keep pets out of the water as well, as exposure to cyanobacteria toxins tends to be lethal in dogs.
More information can be found at https://www.des.nh.gov/water/healthy-swimming/harmful-algal-blooms
Download a copy of the NHDES Cyanobacteria Fact Sheet: https://www.des.nh.gov/sites/g/files/ehbemt341/files/documents/2020-01/wmb-10.pdf