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US Steel Mon Valley Works
Edgar Thompson Plant






From the Latest:


EPA Delays Implementation of Revised Coke Oven Emissions Standards
Last week, the U.S. Environmental Protection Agency (EPA) announced its plan to delay full implementation of the revised National...

Group Against Smog & Pollution
Jul 9, 20252 min read


EPA Offers Exemptions from Clean Air Act Standards...Can It Do That?
The Clean Air Act generated some rare headlines at the very end of March, after the U.S. Environmental Protection Agency (EPA) ...

Group Against Smog & Pollution
Apr 14, 20253 min read


What Should Happen After an Incident at Mon Valley Works? GASP Records Request Provides New Details About Recent Breakdowns
Recent incidents at U.S Steel’s Clairton Coke Works and Edgar Thomson facilities sparked rage and concern among frontline residents and...

Group Against Smog & Pollution
Apr 10, 20256 min read


UPDATED: Allegheny Co. Health Dept. Issues Notice of Violation to U.S. Steel for Edgar Thomson Air Quality Violations
In the midst of a possible multi-billion-dollar merger with Japanese-based Nippon Steel, U.S. Steel continues to pile up air quality...

Group Against Smog & Pollution
Sep 25, 20242 min read


ACHD Seeking Public Comment on Revised Title V Permit for U.S. Steel’s Edgar Thomson Facility; Sept. 23 Hearing Set
The Allegheny County Health Department (ACHD) is seeking public comment on the revised Title V operating permit for U.S. Steel’s Edgar...

Group Against Smog & Pollution
Sep 5, 20242 min read


More H2S Exceedances in Mon Valley Beg Question: Why the Sharp Rise at N. Braddock Despite ET Deal?
If you’ve noticed a distinctive stank in and around the Mon Valley over the past week, Allegheny County Health Department (ACHD) air...

Group Against Smog & Pollution
Aug 24, 20232 min read
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