Top 10 toxic bases

The 10 closed or mostly decommissoned military bases listed by the Environmental Protection Agency in its Superfund program with "groundwater migration" of contaminants or other pollution problems affecting "human exposure" not yet under control:

Tooele Army Depot, Tooele, Utah, groundwater migration.

The Marine Corps Air Station, El Toro, Calif., groundwater migration.

Fort Ord, Monterey County, Calif., groundwater migration and human exposure.

Mather Air Force Base, Sacramento County, Calif., groundwater migration.

McClellan Air Force Base, Sacramento County, Calif., groundwater migration.

Memphis Defense Depot, Memphis, Tenn., groundwater migration and human exposure.

Moffett Naval Air Station, Santa Clara County, Calif., groundwater migration.

Umatilla Army Depot, Hermiston, Ore., groundwater migration.

Naval Air Station Cecil Field, Jacksonville, Fla., groundwater migration.

Williams Air Force Base, Chandler, Ariz., groundwater migration.

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Source: EPA