New Hampshire bans a short, specific list from every landfill and incinerator in the state, and the city facility enforces it at the scale.
The New Hampshire solid waste law states that no one may dispose of wet-cell batteries, lithium-ion batteries, or electronic devices in any landfill or incinerator in the state. Leaf and yard waste are banned as well. Large food waste generators have their own rule. Facilities comply by posting notices and checking incoming loads, which is why a single laptop or car battery can hold up a container.
Hazardous waste is refused at the city facility outright, and the City names asbestos, gasoline, and other solvents as its examples. Household hazardous waste is only taken at special collection events held on the second Saturdays of May and October, and those are open to residents only.
A few items are accepted but conditioned. Only latex paint is taken, and wet paint has to be in containers of a gallon or less with no more than ten cans. Motor oil has to be in containers of a gallon or less and free of water. Fluorescent tubes must be intact, since broken ones are refused. Yard waste has to be clean compostable material, with no brush, logs, or stumps.
The City also reserves the right to refuse any load that does not meet facility requirements. Ask your account manager about anything borderline before it goes in the container.