A county in Iowa no longer needs special pollution rules for sulfur dioxide

US environmental regulators are removing special pollution rules for Muscatine County, Iowa. This means the county has met federal air quality standards for sulfur dioxide and will now follow standard rules.

For years, Muscatine County had to follow stricter rules because its air quality was too poor. This change means the county's air is now clean enough to meet federal standards. It also means local industries will no longer face the same level of scrutiny for sulfur dioxide emissions.