The chlorine level in your drinking water should not be a problem. If, however, you're adding extra bleach to your mop bucket,
it may be irritating to her nose. Chlorine is a very potent gas - it WILL kill - so it may be bothering her.
If she seems to be reacting to her drinking water, find out if your water system is using chlorine alone or something called chloramine - that's a combination of chlorine and ammonia, designed to have a longer "life" in the pipes, preventing bacteria for a longer period of time.
If they're just using chlorine (and she's reacting to it), you have several relatively easy options:
get a filter for your water faucet to filter the chlorine out before it hits her water bowl. Or, get a water pail that you dump and refill daily. When you add the water, stir it up pretty vigorously - this will help the chlorine to "gas off", and within 24 hours it will be gone. This does not work with chloramine (the bonded chlorine/ammonia), only chlorine. Or,
buy her bottled water.
The above methods are the easiest to deal with, but there are other methods, such as adding the chemicals used to treat water before it's added to fish tanks.
However, hopefully her drinking water doesn't bother her, and she's just excited at the sight of the mop
