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PHOTOS: Understanding Emissions Points, Operations at U.S. Steel’s Edgar Thomson Plant

GASP has been vocal in demanding transparency regarding when and how the Allegheny County Health Department (ACHD) and Environmental Protection Agency (EPA) will force U.S. Steel to get its Edgar Thomson Plant back into compliance with local and federal air quality regulations.

While the public is STILL waiting for an update on a compliance plan promised way back in 2017, those living near the facility continue to deal with smoke, dust, and malodors emanating from Edgar Thomson.

GASP wanted to encourage residents to continue to be vigilant and make air quality complaints to ACHD each and every time you experience foul odors or see dark, thick plumes stretching into the sky from Edgar Thomson.

We also wanted to remind folks that the most effective air quality complaints include the time and date of the incident, as well as a quick narrative of what you saw and where.

Because we get that most people probably aren’t well-versed in the steel-making process, we put together some visuals to help you better understand operations at the plant and more effectively pinpoint where the emissions you’re seeing are coming from – check it out:



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  1. Mark Dixon says:

    Super helpful. Thank you for this information!!

  2. Nick says:

    Maybe you can add a tool to make reporting to ACHD a one touch thing where one just touches a button on the cell phone and the dated, timed and GPS report goes directly to ACHD. I live in Swissvale and we know that these ancient relics of the industrial revolution are no longer profitable to US Steel if they have to comply with the law. If the externalities are calculated as part of the calculation, Monesson, Clairton, Irwin and Braddock are a huge loss, especially to ACHD which spends way more on the negative health consequences of the Mon Valley dinosaurs than the value of what they produce.

  3. Jackie Nixon says:

    “This” is the kind of educational awareness that the public can definitely identify with. Excellent!

  4. April says:

    This is wonderful! My neighbors and I in Greenfield wonder sometimes if we are smelling stuff from ET or Clairton. We guess it would have to do with what way the wind is blowing or perhaps the kind of smell. There is a sulfur smell sometimes for sure, but also another more general industrial smell more often that we call acrid – is it from ET or if sometimes we are smelling something that is most noticeable down along Second Ave. near the Hazelwood Library/Post Office and could be coming from a facility along the river there?

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Group Against Smog and Pollution