Updated: 6:42 p.m. Wednesday, April 29, 2009 | Posted: 11:24 a.m. Wednesday, April 29, 2009
PITTSBURGH —
However, Guillermo Cole of the Allegheny County Health Department, said, "The ranking is unfair and misleading."
Cole told Channel 11 News that the ALA based its ranking on a single air sample from a single site in Allegheny County. That site is the liberty monitor on top of South Allegheny High School, which is less than 3 miles from the Clairton coke works.
Cole said the ALA didn't use several other air quality samples -- from places like Lawrenceville, Moon and North Park -- which all met the national standard.
It's the second consecutive year that Pittsburgh was at the top of the list.
The city was also ranked second worst for year-round particle pollution, only behind Los Angeles.
The ALA said the rankings were based on monitors from the Environmental Protection Agency located throughout Allegheny County.