My advice goes out to all Canadians regardless of location.
Our great civilization's sewage treatment process DOES NOT treat the many many many chemicals and other that we flush down our toilets and sinks everyday. Our sewage systems are designed to handle HUMAN WASTE not cleaning chemicals, grease from restaurants and the many other waste products we tend to flush down our drains.
Doing my part in Victoria, I have concentrated on P2 (pollution prevention) initiatives that reduce pollution at the source. For example, Southern Vancouver Island dentists are responsible for about 30-40% of the mercury that is dumped directly off our shores and taken up by our beautiful Orcas and all the other marine life-forms.
A couple of years ago, Maximum Separation Systems (a local company here in Victoria) helped the CRD to bring in sewer by-laws to legally force dentists to install amalgam separators and stop the mercury pollution at the source. At MSS, we fought long and hard against many dentists and the BC and Canadian Dental Associations to make this a reality. Finally, this message and the laws are now spreading across Canada.
More recently, at Royal Roads University (also in Victoria), I have helped to pioneer a chemical free cleaning system that has reduced chemical use on the entire campus by about 90-95% over the past two years. There is a residential and commercial version of this cleaning system that has been used in Europe since the early 1990's. (Personally, I have been using NO cleaning chemicals for almost four years and my house isn't infested with rats yet).
So Barbra and others to make a long story short....prevent pollution BEFORE it occurs, and spread the word about how no matter where you live in Canada your sewage treatment process allows many many many chemicals and other nasty things to pass right through and into your local environments.