I just stumbled across this article about commercial pools in my town. It's old but I doubt much has changed. It made me think about how much time I spend dealing with my own pool to make sure it's sanitized but when I go on vacation, I don't even think about it. I just jump right in. I am starting to think that hotels should have to post their test results several times each day for everyone to see.
In the article, one hotel owner said that he didn't understand why there was no chlorine in his pool. He tested it every morning. Sigh....
I do have to say that two of the three areas where they tested are not places where I would stay but they are very busy tourist destinations.
It is sad that commercial pools are maintained in such a haphazard manner and inspections are so rare. People should use common sense and stay out of pools when they can't see the bottom.