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Carbon Monoxide Area Information (1979 Standard)


This page provides detailed information on designations and classifications of carbon monoxide areas originally designated as in nonattainment. As of September 27, 2010, all Carbon Monoxide areas have been redesignated to maintenance areas.

  1. Nonattainment Area Selections

    As of September 27, 2010, all Carbon Monoxide areas have been redesignated to maintenance areas

  2. Maintenance Area Selections (Redesignated from Nonattainment)
    1. Area Listings
      1. Classified Areas Sorted by Classification
      2. Not Classified Areas
      3. Sorted by State/Area/County
      4. Sorted by Area/State/County

    2. Area Designation Data
      1. Classified
      2. Not Classified

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

  4. Federal Register Notices and Related CO Designation and Classification Information
    1. Carbon Monoxide Standards website

    2. November 6, 1991 - 40 CFR PART 81 Air Quality Designations and Classifications (PDF)

    3. Other Associated Federal Register Notices
      1. Attainment Date Extensions
        These extensions modify the dates shown in the nonattainment areas above
      2. Changes to a Higher Classification
      3. All 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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