how big a deal is "Cyanobacteria (blue-green algae)" when (small) boating?

doesn't all water not coming out of a tap have "Cyanobacteria (blue-green algae)" in it?

do I gotta keep extra bottle of water to rinse off the tops of my cans of beer when out in my SOT kayak?

What if someone drinks a big gulp of water infested with Cyanobacteria (blue-green algae)? How sick will they get? Are we talking brown squirts for a couple days or are we talking Medi-Vac to trauma center and call the priest?

Does it matter your age and other pre-existing conditions much?

 

Dry the top of the can off. A couple seconds of UV will kill anything else.

 

UV kills algae? Don't algae need sun?
What about when I get spray raw water splashed in my mouth?

Kinda tricky to dry cans in SOT kayak in chop. One thing I learned when dabbling in home beer brewing was there really are invisible wee-beasties floating around everywhere and will get into any open container.

 

UV kills bacteria, virus and fungus but algae love it. Blue green algae has been linked to carcinogens. What's a safe dose? I dunno.
Usually where algae is present you will also find other undesirables.

7 Most Common Waterborne Diseases (and How to Prevent Them) https://lifewater.org/blog/7-most-common-waterborne-diseases-and-how-to-prevent-them/

 

Health Risk Assessment of Cyanobacterial (Blue-green Algal) Toxins in Drinking Water https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3814695/
Not that I trust the NIH.

 

Algaes like b-g don't survive outside of water do they? UV kills most the rest...

 

Politicians?

 

Yeah. Politicians.