How much is too much water? I'm easily hitting 160 oz, but usually hit 192 oz and today I'm over 200 oz.

You can not drink too much water, however you can rink too much water at one time. If you drink more than 24oz at one time you run the risk of diminishing your sodium and electrolytes. So make sure that you spread your water intake throughout the day and of course be sure you are supplementing with your healthy salt.