Ordinary building and cleanout debris is fine. The exclusions come from state law and from how the town's transfer station classifies certain items.
New Hampshire tightened its battery rules in July 2025, and rechargeable lithium-ion batteries can no longer go in household trash at all. They have to be recycled, and the Derry Transfer Station runs a program for them. Cordless tool packs and e-bike batteries are the ones people forget on a job site.
Appliances with refrigerant are handled separately. A refrigerator, air conditioner, or dehumidifier goes through a freon removal step rather than into a mixed load, and each one carries its own charge.
Televisions and computer monitors are also billed per piece rather than by weight, which means they need to be declared and kept out of the container.
Paint, solvents, fuel, pesticides, and other household chemicals belong at the town's hazardous waste collection day rather than in any container. Derry's next one is listed for Saturday, May 9, 2026.
If you're not sure where something belongs, check with your account manager before it goes in.