Most debris from a remodel or cleanout can go in your container. Maine's rules and the facility that takes the load set the limits.
The Maine Department of Environmental Protection says it's illegal to throw away cathode ray tubes and LCD screens. That covers TVs, computer monitors, laptops, tablets, and other devices with screens, which go to electronics recycling instead. Maine also bans throwing away mercury-added products, such as old thermostats and fluorescent bulbs.
Hazardous waste, liquids, fuel, solvents, oil-based paint, propane tanks, and asbestos don't belong in a standard dumpster. The City holds a free household hazardous waste drop-off twice a year for residents, and Maine's paint take-back program accepts leftover paint at participating stores.
Appliances with Freon, such as refrigerators, dehumidifiers, and air conditioners, need special handling. Mattresses and tires are charged per piece at local facilities, so mention them when you book.
If you're not sure about an item, ask your account manager before it goes in.