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It’s Official: EPA Determines Allegheny County Has Met National Ambient Air Quality Standards for Sulfur Dioxide
Big news, folks: The U.S. Environmental Protection Agency (EPA) on Monday published notice of its approval of a request to designate...
Apr 291 min read
EPA Formalizes Designation of New PA Non-Attainment Area & Reduces Secondary NAAQS for Sulfur Dioxide to End 2024
We blogged earlier this year about two developments concerning the National Ambient Air Quality Standards (NAAQS) for sulfur dioxide...
Dec 23, 20242 min read
EPA Proposes Revised Secondary National Ambient Air Quality Standard for SO2 for 1st Time Since ‘71
On April 15, EPA proposed to retain the secondary NAAQS for oxides of nitrogen and particulate matter, while revising the SO2 NAAQS.
Apr 29, 20243 min read
New Designated Non-Attainment Area for SO2 in Western PA? That’s What EPA's Proposing - But is it Too Late to Make a Difference?
The U.S. Environmental Protection Agency (EPA) earlier this month announced a proposal that - if approved - would mean four...
Feb 20, 20243 min read
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