Summit County Landfill is a superfund site located at 3 Mi E 1 Mi N Dillon Off Hwy 6, Dillon, CO 80435. The Environmental Protection Agency (EPA) identifies sites such as Summit County Landfill because they pose or had once posed a potential risk to human health and/or the environment due to contamination by one or more hazardous wastes. Summit County Landfill is currently registered as an Archived superfund site by the EPA and does not require any clean up action or further investigation at this time.