Posts Tagged ‘heavy metals’
The Illinois Environmental Protection Agency says air quality last year improved.
An annual report shows that air quality trends for pollutants for which air quality standards have been developed – along with some heavy metals, nitrates, sulfates, volatile organic and toxic compounds – are continuing to show downward or stable trends that are well below the established standards.
Air quality during 2008 was either good or moderate more than 96 percent of the time throughout Illinois.
There were 14 days air quality in some part of Illinois was considered "Unhealthy" for sensitive groups, this compares to 24 "Unhealthy" for sensitive groups days in 2007.
The improved numbers come even though a more stringent federal standard for measuring acceptable air quality was used for the 2008 report.
Percentage changes from 1999 through 2008 show decreases of 14 percent for particulate matter (PM10), 20 percent particulate matter (PM2.5), 15 percent for sulfur dioxide, 13 percent for nitrogen dioxide, 47 percent for carbon monoxide, 18 percent for lead and 12 percent for ozone.
Tags: illinois environmental protection agency, air quality trends, ozone, heavy metals, environmental protection agency, sulfur dioxide
Posted in Dust, PM10, dust control | 
Tags: air quality standards, air quality trends, annual report, carbon monoxide, environmental protection agency, heavy metals, illinois environmental protection agency, nitrates, nitrogen dioxide, ozone, particulate matter, percentage changes, pollutants, sensitive groups, sulfur dioxide, toxic compounds | 
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