Search Records of Site Condition (Ontario)
Environmental Register of Ontario
Environmental Registry of Ontario - Map (new site)
Environmental Registry of Ontario (archived material)
Small Landfill Sites List - Ontario
Large Landfill Sites - Map - Ontario
Ontario inventory of PCB storage sites, April, 1995 by Ontario Ministry of Environment and Energy (From the Internet Archive)
National Pollutant Release Inventory - On-line Facility Data Search