Not sure if it was about the people statement.
Many areas in Phoenix and Arizona are toxic due to previous mines and operations, tailings, and other contamination etc. What was once a dumping ground of out of state problems is now a populated state itself.
So many toxic sites and so little disclosure about them typically. This gives some info regionally on Maricopa county.
Several pieces of land across the Valley are considered to be hazardous waste sites.
www.abc15.com
Further NPL seems to constantly downplay severity of pollutants contaminants in its Superfund monitored areas. It seems the entity exists to prolong matters and contest matters that are before the courts. In many jurisdictions this going for 50yrs.
Heres a wider breakdown of Arizona contaminated "Superfund" cites and locations.
edit. whoops...