A new, recently released study of Georgica Pond’s water quality contains a big surprise. Bacteria tests conducted by the Surfrider Foundation and Chris Gobler’s Stony Brook Southampton laboratory, paid for by the Friends of Georgica Pond, have for some time shown elevated fecal bacteria levels, especially after heavy rain. Now, thanks to further work by Dr. Gobler and several colleagues, a culprit, if not the source, has been identified: dogs.