Naval Air Station South Weymouth, was an operational United States Navy airfield from 1942 to 1997 in South Weymouth, Massachusetts. It was first established as a regular Navy blimp base during World War II. During the postwar era the base part of the Naval Air Reserve Training Command, hosting a variety of Navy and Marine Corps reserve aircraft squadrons and other types of reserve units. Environmental contamination from wastes stored in 3 landfills was detected in 1986, and since 1993 the site has been on the National Priorities List of Superfund sites. Numerous remedies and long term monitoring of ground water are in place.