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Green Book

Green Book Early Action Compact (EAC) Areas


You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.Fourteen areas were listed in 40 CFR Part 81 Subpart C as participating in an Early Action Compact (EAC) and designated nonattainment with a deferred effective date.

  1. Area Listings Sorted by
    1. Classification
    2. State/Area/County
    3. Area/State/County

  2. Area Maps
    1. U.S. Map

  3. Area Designation Data
    1. Data

  4. Area Summary Report

History

On June 15, 2005 the 1-Hour Ozone standard was revoked for all areas except the 8-Hour Ozone nonattainment Early Action Compact (EAC) areas. This happened by virtue of 40 CFR 50.9(b). Due to the revocation of the 1-Hour Ozone standard, effective June 15, 2005 (70 FR 44470), 1-Hour Ozone designations and classifications were removed for all areas except EAC areas that had deferred effective dates for their designations under the 8-Hour Ozone 1997 standard.  
See 70 FR 44470

By April 2008, 13 of the areas were designated attainment when they met all of their EAC requirements and had clean 8-Hour Ozone (1997) data by December 31, 2007.

The Denver-Boulder-Greeley-Ft Collins-Loveland, Colorado Subpart 1 EAC area, was designated nonattainment for 8-Hour Ozone, effective November 20, 2007 (72 FR 53952), based on air quality data from 2005, 2006 and the first three quarters of 2007. For Denver, the 1-Hour standard was revoked November 20, 2008. 
See 72 FR 53952

The former 1-Hour Ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of Part 81 for the areas affected by the anti-backsliding regulation. 

Current Status

On April 2, 2008, EPA finalized (73 FR 17897) the designation of the remaining 13 Early Action Compact (EAC) Areas as attainment for the 8-Hour Ozone (1997) National Ambient Air Quality Standards (NAAQS), effective April 15, 2008. The States in which these 13 areas are located had submitted quality-assured data indicating that the areas are in attainment for the 8-Hour Ozone NAAQS based on ambient air monitoring data from 2005, 2006 and 2007.

In addition, consistent with EPA's implementing regulations, the 1-Hour Ozone NAAQS no longer applied in each of these areas one year after the effective date of the designation. The 8-Hour Ozone (1997) NAAQS tables were modified in the regulations to reflect the attainment designation for the 13 EAC areas and the 1-Hour Ozone NAAQS tables in the regulations to reflect that the 1-Hour standard no longer applies in these areas as of April 15, 2009. 
See: 73 FR 17897