Since October 2014, US Steel Clairton has been fined $6.65 million for 39 enforcement actions.
Source: U.S. Environmental Protection Agency

What you can do if you smell a sulfur or rotten egg odor

1. Report it directly to the new Allegheny Health Department website
(click Request Service/File Complaint > Health Department > Air Quality)

2. Use the SmellPGH app (smellpgh.org) to report and track the odor

-You can also call the health department ACHD and report the odor

Note: Make sure to report it to the Health department & SmellPGH. The SmellPGH app is independent of the Health Department. So, it is important to submit complaints to both.

Sulfur Dioxide (SO2) has the “struck match” odor and Hydrogen Sulfide (H2S) is the “rotten egg” odor

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https://pennfuture.org/Blog-Item-PennFuture-delivers-Toxic-Neighbor-petition-to-US-SteelPennFuture delivers Toxic Neighbor petition to U.S. Steel