In Ottawa, plastic and glass recyclables go into a "blue bin", and are picked up once every two weeks as part of the regular household garbage collection.
Styrofoam is not recyclable. It has never been recyclable. The instructions on the City of Ottawa website are clear: place these items in your regular garbage. It's not like a person has to go to the website to find this out, either. Every household in the city receives recycling information on a regular basis, with lists of what can and cannot be recycled.
So why is it that, every recycling day, I see blue bins containing styrofoam? Not to mention blue bins with plastic bags. Coat hangers. Scrap metal.
I have several theories, but no evidence (if you have evidence, please let me know):