Nantmel Landfill Site is a closed waste-disposal site situated in the community of Nantmel, Llandrindod Wells, Powys, Wales. It operated from 1960 to 1990, accepting domestic, commercial, non-hazardous industrial, inert and asbestos waste. It was one of 80 municipal landfill sites in Powys, of which all have now closed. Three privately owned sites still operate within the county.