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Sulfur Dioxide (SO2) Pollution

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Sulfur Dioxide (SO2) is one of a group of gases called sulfur oxides (SOx). The other gases in the group are much less common in the atmosphere .

May 29, 2018 - EPA proposes to retain the primary SO2 NAAQS. Learn more

Sulfur Dioxide (SO2) Pollution

Sulfur
Dioxide Basics

Setting and Reviewing
the Standards


Implementing
the Standards

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