St. Louis City ZIP codes 63102 and 63147, covering the North Riverfront and Near North Riverfront neighborhoods of St. Louis City, are now included as part of the July 2025 RECA expansion.
This area has long been impacted by radioactive contamination linked to the Downtown Mallinckrodt uranium processing facility and its associated waste transportation routes, which passed directly through these communities enroute to sites such as Coldwater Creek and West Lake Landfill.