I don't know the answer, but I do know it smelled like septic.

We have all been made aware of the risk of becoming sick when we travel. No one in our group got sick and the places we ate emphasized that they used sanitized water.

It was comforting to read in the B&B information that should you become sick, to let them know immediately. Someone would be dispatched to collect bloodwork and a stool sample. The results of the test would be reported to a doctor who would make a house call to examine you and write a prescription. This would be delivered by the pharmacy to you.
Now that's what I call service!