Can you get parasites from an outdoor fountain, lake, pool, etc?

Yes: In summer, warm bodies of still water can develop not just bacteria but parasites that can infect recreational swimmers and participants in water sports.One rare parasite (naegleria fowleri), commonly referred to as an amoeba, occasionally crops up during particularly hot summers in lakes and pools in california, arizona, florida, and texas.The amoeba infects swimmers when water gets into the nose.

Possible: If those are infected with parasites, you sure can get them.