The St. Louis area is getting some good news from the U.S. Environmental Protection Agency. A federal judge has given the E.P.A. until Monday, March 12, to decide whether the region’s effort to comply with the ozone standard of the Clean Air Act should remain in the “moderate” non-compliance category or be moved into the “serious” non-compliance category. The E.P.A. will recommend on Monday that the city remain in the “moderate” category, thus giving the city more time to adhere to the regulations. A reclassification into the “serious” category could have cost Missouri hundreds of millions of dollars in federal highway money.