Triclosan is another substance that is causing problems when it gets into water. Streams with higher levels of triclosan have lower levels of algae. Do you really need antibacterial soap? There are lots of nice-smelling brands these days that do not contain triclosan.
Things that individuals do can have a lot more impact on the environment than you would think. If we all thought more about the ingredients in our personal care and cleaning supplies, we'd probably be healthier *and* have better water!