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Sulfur Dioxide (SO2) Primary Standards -
Documents from Review Completed in 2010 -
FR Notices

Information provided for informational purposes only Note: EPA no longer updates this information, but it may be useful for historical purposes. See the SO2 Standards Home Page for documents from the current review of the SO2 NAAQS.

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Rulemaking Notices / Public Hearings

Final Revisions to the Primary NAAQS for SO2 6/22/2010 PDF file
624 kb
Proposed Revisions to the Primary National Ambient Air Quality Standards for SO2 12/08/09 PDF file
672 kb

Pre-Rulemaking Documents / Availability and Opportunities for Public Comment

Notice of Availability - Risk and Exposure Assessment to Support the Review of the SO2 Primary NAAQS 07/29/09 PDF file
80 kb
Notice of Extension of Public Comment Period - Second Draft Risk and Exposure Assessment Report 05/21/09 PDF file
76 kb
Notice of Availability- Second Draft SO2 Risk and Exposure Assessment 04/23/09 PDF file
85 kb
Notice of Availability SO2 Risk and Exposure Assessment Report - First Draft 07/21/08 pdf file
94 KB
Announcement of Availability of ISA for Sulfur Oxides - Health Criteria (Second External Review Draft) 05/30/08 pdf file
78 KB
Integrated Science Assessment for SOx: Call for Information 05/15/06 PDF file
80 KB

Public Meetings / Workshops

Workshop on Assessment of Health Science for Nitrogen Oxides (NOx) and Sulfur Oxides (SOx) 02/09/07 PDF file
68 KB

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