Green Book Nonattainment Areas
Carbon Monoxide (1971) Area Information
This section provides detailed information about nonattainment area designations for the Carbon Monoxide (1971) National Ambient Air Quality Standard (NAAQS). Original Carbon Monoxide (1971) areas were designated November 15, 1990.
- All Designated Area Selections (Nonattainment and Maintenance)
- Nonattainment Area Selections
As of September 27, 2010, all Carbon Monoxide areas have been redesignated to maintenance.
- Maintenance Area Selections (Redesignated from Nonattainment)
- Area Listings
- Area Designation Data
- Other Information
- Federal Register Notices Related to Carbon Monoxide (1971 Standard) Areas