Thank you for your question.
We have done some research on the migration of both nutrients and microbes and viruses in soils from septic systems, which we do communicate to the provinces and municipalities, who are in fact responsible for the bylaws that control these. So, yes, we do have some information on it, which can inform the setting of setbacks and other processes.
However, I think one of the problems that sometimes can be ignored is that many of these cottages are built on terrain that is simply not suitable for septic systems. It's not a question necessarily of setbacks, if you're building cottages on the Canadian Shield, where you simply don't have enough soil for a septic system to work at all.