WASHINGTON, Feb. 12 (TNSFR) -- The U.S. Environmental Protection Agency announced has approved revisions to the Ohio state implementation plan to ensure long-term air quality standards. The final rule confirms that maintenance plans submitted by the Ohio Environmental Protection Agency effectively manage ozone levels in the Cincinnati, Cleveland-Akron-Lorain, and Columbus areas.

The approval follows a review of plans intended to maintain the 2008 ozone National Ambient Air Quality S . . .

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