Could someone tell me if it safe to swim in chemically treated pool water?

I read about the dangers of chlorine and other chemicals.

Chlorine is a very caustic agent that kills bacteria by dissolving protein deposits from germs. The only problem is that human cells also built the same way. If chlorine is not well controlled or if they are too sensitive or exceptionally long pass in the pool, must be safe. But if you have a choice, find a pool of water saline-treated or natural body of fresh water.

Pool Chemicals – Who What When Where How from SafetyInstruction.com