Summertime is the time for people to gather at the pool. Whether it’s the local public facility with the kids or the swanky hotel pool with cabanas, bottle service, and beautiful people by the dozens, a quick dip in the pool is a great way to beat the heat. Unfortunately, most people don’t realize that public pools and hot tubs can be a breeding ground for infections and outbreaks. Read on for reasons why you shouldn’t just jump in the pool to cool off.

Chlorine Can’t Cure Everything

While it’s easy to feel safer when the smell of chlorine permeates the air near a public swimming pool, that doesn’t mean it’s free of contaminants for pathogens. Most outbreaks occur at hotel pools and hot tubs during the summer.

Some parasites such as Cryptosporidium can survive for over a week in chlorinated water. Anyone who swims in that pool risks being infected; about 80% of all pool-related illnesses was from Cryptosporidium.

Not All Backsides Wait

The Centers For Disease Control and Prevention (CDC) recommends that anyone that has had diarrhea should wait at least two weeks before entering a public pool or hot tub. Unfortunately, not everyone heeds this advice.

Even if they’re feeling better, their intestines will still be shedding Cryptosporidium, which means these disease-inducing parasites could easily infect you if they’re in the water while you are.

Pool Cleaners Aren’t Always Reliable

So if it seems like the pool has been properly treated with chlorine and if nobody who’s been sick lately is in the pool, you should be safe, right? Wrong. Pool maintenance can be a tricky thing, with some hotels neglecting this important service.

Other times, pool cleaning can be regularly done, but not be enough at any given time. The CDC even recommends that hotel guests bring their own water testing strips so they can check out the chlorine level and pH.