Most construction and household debris is fine to load. North Dakota law and the City landfill's own list set the limits.
State law says lead-acid batteries, used motor oil, wind turbine blades, and major appliances can't be placed in municipal waste or buried in a landfill. The City landfill still takes appliances and batteries, but only as separated recycling, and it won't take appliances that contain Freon, such as air conditioners, refrigerators, and freezers.
The landfill's waste acceptance list turns away liquid waste beyond household amounts, liquid paint, used oil, unrinsed pesticide containers, mercury devices like thermostats and fluorescent tubes, and hazardous materials such as solvents and fuels. Paint cans are accepted once the paint is fully dried out.
One local difference is worth knowing. The Williston landfill accepts TVs and electronics with household waste. State law also requires metal to be separated, so keep scrap metal in its own pile. Your account manager can review anything you're unsure about.