Declining levels of possible carcinogen in a Tucson Superfund Site
![Map showing decline of a potential human carcinogen, 1,4-dioxane, in the Tucson International Airport Area Superfund Site](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/TIAAmap.jpg?itok=BBzkyvMr)
Detailed Description
Levels of a potential human carcinogen, 1,4-dioxane, have mostly declined in wells in the commercial and residential areas of the Tucson International Airport Area Superfund Site during 2002-2017, according to a new map published by the U.S. Geological Survey.