I think she's talking about the "rotten seaweed" addition, rather then the water. Our bay water is pretty nasty, two words, (EPA) Super Fund (site). We've had a few site within the bay, with the blasting of the radioactive Bakinini Atoll lead based paint war ships, the dropping of those steel barrels filled with radioactive debris (outside the Golden Gate fortunatly) and not to mention the whole oil refinery section of the bay.