All I can find are articles and questions on whether they through it out the window, and it's quite annoying.
By directly intentional I mean throwing their chamber pots by hand, by indirectly intentional I mean they knew that their sewers were dumped upriver or what have you, by unintentional I mean that their containment didn't work how it was supposed to, and the last one is self explanatory. Thanks!
Before other responses come in, you might be interested in my previous response to a very similar topic (general waste management in the Middle Ages) it this thread.