Here's the story - thanks to the ongoing Great Flood of 2019, and 1/3 of our village being under waist-high water (and looking to stay that way for a few more weeks), our wastewater treatment plant is rather taxed at the moment and on April 29th we were asked to limit what goes down our drains.
Okay then. It certainly seems a reasonable thing to do under the (apocalyptic) circumstances.