How Maryland fares in national rankings [Pictures]
See where Maryland, its cities and its notable places rank on national lists, ranging from best places for singles to top-ranked institutions of higher learning.
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Worst air quality: No. 13 and No. 21( Barbara Haddock Taylor, Baltimore Sun / September 8, 2004 )
Summertime smog levels in Harford and Prince George's counties are still among the worst in the country, according to the American Lung Associations 15th assessment of the nation's air quality. Harford Co. had the 13th worst ozone levels of any county in the nation, and Prince George's ranked 21st. At the same time, the lung association rated Harford as being among the 25 "cleanest" counties when it comes to particle pollution.
Pictured: The Chalk Point Power Plant in Prince George's County, 2004