Superfund Site Profile
The Ottawa Radiation Areas site, located in LaSalle County, Illinois, consists of 16 areas contaminated by radioactive materials. The 16 areas are scattered throughout the city of Ottawa as well as locations outside the city. EPA added the areas to the Superfund program’s National Priorities List (NPL) because they are contaminated by the same wastes, involve the same potentially responsible parties (PRPs) and require similar cleanups. The contamination likely originated from the processing of wastes and demolition debris from the Radium Dial Company between 1918 and 1936 and from Luminous Processes, Inc. between 1937 and 1978. These businesses produced luminous dials for clocks and watches, using radium-based paint. Following actions to protect human health and the environment in the short term, EPA developed long-term remedies for the site. Implementation of some of these remedies are ongoing.