Even before Monday's (12/22) designation of Scott, Rock Island and Muscatine counties as "non-attainment" for fine particulate pollution, Iowa and Illinois environmental agencies were hard at work analyzing 2008 air quality data to challenge the decision.
A loophole in the U.S. Environmental Protection Agency (EPA) non-attainment filing allows states to submit "complete, quality assured, certified 2008 data" prior to the effective date of the EPA rulemaking, Feb. 20, 2009, to obtain a reversal of the designation. Normally, states don't submit annual data until April, and certification of the data isn't required until July of the following year.
Air quality officials in Iowa have argued in earlier EPA submissions the 2005-2007 monitoring data used to determine non-attainment was skewed because of unusually hot weather, which affects formation of particulate matter less than 2.5 micrometers.