The Toronto half of this site is now (happily) a research archive, and is not being actively maintained since the City published what I consider to be adequate information about public washrooms. You can find the City’s official Winter washroom list here: https://www.toronto.ca/explore-enjoy/recreation/recreation-community-facilities/winter-washrooms-in-parks/#location=&lat=&lng=
The Hamilton side is still in progress and being researched and maintained, as no similar list from the City of Hamilton has been published.
If you prefer, you can download an Excel spreadsheet of the Fall and Winter washrooms here/Si vous préférez, vous pouvez downloader une liste Excel des toilettes disponible l’automne et l’hiver ici:
Toronto Toilets 