Delaware

In Chesapeake Bay, you may flush pet waste as it goes to a sewage treatment plant, so the waste will not pollute waterways. You need to remove bags, rocks, sticks, and litter before flushing the waste. You may put the waste in flushable bags to dispose of in the toilet.

Find the article here: https://www.chesapeakebay.net/news/blog/the-scoop-on-poop