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Sulfur Dioxide Area Information (1971 Standard)

  1. Nonattainment Area Selections
    1. Area Listings
      1. Nonattainment Areas
      2. Sorted by State/Area/County
      3. Sorted by Area/State/County

    2. Area Maps
      1. National Map of 1971 SO2 Nonattainment Areas

    3. Area Designation Data
      1. Designation, Population, Counties

  2. Maintenance Area Selections (Redesignated from Nonattainment)
    1. Area Listings
      1. Maintenance Areas
      2. Sorted by State/Area/County
      3. Sorted by Area/State/County

    2. Area Designation Data
      1. Designation, Population, Counties

  3. Other Information
    1. Summary Reports
      1. Nonattainment Area Summary Report
      2. Maintenance Area Summary Report

  4. Federal Register Notices and Related SO2 Designation Information
    1. Sulfur Dioxide Standards website

    2. Revised SO2 NAAQS Notices
      1. Proposed Primary National Ambient Air Quality Standard for Sulfur Dioxide (December 8, 2009) (PDF)
      2. Final Primary National Ambient Air Quality Standard for Sulfur Dioxide (June 22, 2010) (PDF)

    3. Designation Notices
      1. Final Air Quality Designations for the 2010 Sulfur Dioxide (SO2) Primary National Ambient Air Quality Standard (August 5, 2013) (PDF)

    4. Other Associated Federal Register Notices
      1. Notices Listed By Category
      2. Notices Listed By Area Name
      3. Notices Listed By State then Area
      4. Notices Listed By Date

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