It's really important to stay hydrated, because your body often mistakes thirst for hunger. Drink water every 10m in the pool. Also, I often take a small amount of heavy protein immediately after the workout (~1/2 of one of those 33g protein bars is typical), then jump in the shower.
Between these two habits, I've killed the post-swim binge. Hope it works for you too!
Don't worry, any germs or other organic nastiness are completely neutralized by the vast quantities of chlorine, which is what you should actually be going "eww" about.
(I once drank a mouthful of pool water as a kid and got a really awful headache shortly thereafter. I suppose I'm lucky that's all I got.)
Between these two habits, I've killed the post-swim binge. Hope it works for you too!