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Figure

Days exceeding the target value as 3-year average 2002-2004

Figure Created 12 Nov 2009 Published 12 Nov 2009 Last modified 29 Nov 2012
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In 2004 urban/suburban background areas provided 44 % of stations, rural background areas 24 %, traffic sites 18 %, 9 %, industrial, and 5 % not properly classified.

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Filed under: ozone, air
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