EPA held a public hearing on its proposed decision to retain the existing primary National Ambient Air Quality Standard for Sulfur Oxides. Read the Federal Register notice announcing the hearing and extending the public comment period to August 9, 2018.

The hearing tookeplace on July 10, 2018, beginning at 9 a.m. (local time) in Washington, DC at EPA's William Jefferson Clinton East Building, Room 1117, 1200 Constitution Ave., NW