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Questions and Answers
What is the purpose of EPA’s national ambient air quality standards for SO2?
What is the purpose of EPA’s national ambient air quality standards for SO2?
They are designed to protect against exposure to the entire group of sulfur oxides (SOx).
Why is SO2 used as the indicator for the larger group of gaseous sulfur oxides (SOx)?
Why is SO2 used as the indicator for the larger group of gaseous sulfur oxides (SOx)?
SO2 is the component of greatest concern.
What is the relative concentration of other gaseous SOx (such as SO3) in the atmosphere compared to SO2?
What is the relative concentration of other gaseous SOx (such as SO3) in the atmosphere compared to SO2?
Other gaseous SOx are found in the atmosphere at concentrations much lower than SO2.
What group does SO2 represent in the context of air quality standards?
What group does SO2 represent in the context of air quality standards?
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