July Is Peak Time for Illness From Poop in Pools: CDC Is it safe and sound to look in water this summer? Not really if microscopic bacteria like E. Cryptosporidium or coli are going swimming in the pool with you, U.S eriacta online . Wellness officials warn. 58 % began for the reason that month. which could be within feces. poisons emitted by harmful ‘algae blooms usually. ‘ Would-be swimmers will get a heads-up about those problems frequently, however. ‘It’s important to follow any published advisories where beaches are shut for going swimming,’ Glatter said. Avoid any drinking water that appears stained also, foamy or includes a foul smell.