Municipal sewage treatment plants traditionally treat sewage to kill harmful bacteria, remove the waste solids, and pump the resultant "safe" effluent directly into a freshwater source that eventually drains into ocean bays. Unfortunately present means of sewage treatment do not kill the T. Gondii parasite, which is carried in cat feces, among other sources. Cat owners using flushable litters, may be unwittingly contributing to the ultimate deaths of sea otters.
These cat litters are excellent for a number of other reasons, but please don't flush them. Read page 2 of the article
to see other things you can do do help preserve the sea otter population.
The picture at left is of river otters, a cousin to the sea otters. Photo © Franny Syufy