[PAR] [TLE] Tar Creek Superfund site [SEP] Tar Creek Superfund site is a United States Superfund site, declared 1983, located in the cities of Picher and Cardin, Northeastern Oklahoma.  From 1900 to the 1960’s lead mining  and zinc mining companies left open Chat piles behind until the present day.  The dust has blown around the city containing these metals, cadmium, and others.  The metals have also seeped into groundwater, ponds, and lakes, many of which still are used by children for swimming.  Elevated lead, zinc and manganese levels in Picher children have led to learning disabilities and other problems.  The EPA declared Picher to be one of the most toxic areas in the United States. [PAR] [TLE] Tri-State district [SEP] The Tri-State district was an historic lead-zinc mining district located in southwest Missouri, southeast Kansas and northeast Oklahoma.  The district produced lead and zinc for over 100 years.  Production began in the 1850s and 1860s in the Joplin - Granby area of Jasper and Newton counties of southwest Missouri and continued until the closure of the Picher, Oklahoma mines in 1967.  The tri-state district includes three mining-related Superfund sites: the Tar Creek Superfund site in Oklahoma, and two others in Missouri and Kansas.
[PAR] [TLE] Tar Creek Superfund site [ SEP ] Tar Creek Superfund site is a United States Superfund site , declared 1983 , located in the cities of Picher and Cardin , Northeastern Oklahoma . From 1900 to the 1960 ’s lead mining and zinc mining companies left open Chat piles behind until the present day . The dust has blown around the city containing these metals , cadmium , and others . The metals have also seeped into groundwater , ponds , and lakes , many of which still are used by children for swimming . Elevated lead , zinc and manganese levels in Picher children have led to learning disabilities and other problems . The EPA declared Picher to be one of the most toxic areas in the United States . [PAR] [TLE] Tri - State district [ SEP ] The Tri - State district was an historic lead - zinc mining district located in southwest Missouri , southeast Kansas and northeast Oklahoma . The district produced lead and zinc for over 100 years . Production began in the 1850s and 1860s in the Joplin - Granby area of Jasper and Newton counties of southwest Missouri and continued until the closure of the Picher , Oklahoma mines in 1967 . The tri - state district includes three mining - related Superfund sites : the Tar Creek Superfund site in Oklahoma , and two others in Missouri and Kansas .
The Tri-State district includes the Superfund site in what Oklahoma cities?
The Tri - State district includes the Superfund site in what Oklahoma cities ?
Picher and Cardin
Picher and Cardin