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Federal Register Notices Related to 8-Hour Ozone (2008) Designations and Classifications
Federal Register Notices Related to 8-Hour Ozone (2008) Designations and Classifications
Data is current as of March 31, 2024Ordered Chronologically in Descending Order
Click on the 'FR' link to view the Federal Register Notice
Last Notice
| 03/08/2023 | Riverside County (Coachella Valley), CA | CALIFORNIA | 88 FR 14291 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 01/11/2023 | Riverside County (Coachella Valley), CA | CALIFORNIA | 88 FR 1543 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 10/20/2022 | Nevada County (Western part), CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/20/2022 | Ventura County, CA | CALIFORNIA | 87 FR 63698 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 60926 | Final Approval | Clean Data Determination/Attainment Determination |
| 10/07/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 60926 | Final Approval | Attainment Date Extension Denied |
| 10/07/2022 | Morongo Band of Mission Indians, CA | CALIFORNIA | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | Morongo Band of Mission Indians, CA | CALIFORNIA | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 87 FR 60926 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 10/07/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 87 FR 60926 | Final Approval | Failure to Attain by Attainment Date |
| 07/14/2022 | Nevada County (Western part), CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2022 | Ventura County, CA | CALIFORNIA | 87 FR 42126 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 05/20/2022 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 87 FR 30828 | Final Approval | Redesignation to Maintenance |
| 05/20/2022 | Chicago-Naperville, IL-IN-WI | INDIANA | 87 FR 30821 | Final Approval | Redesignation to Maintenance |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | INDIANA | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | INDIANA | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Dallas-Fort Worth, TX | TEXAS | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Greater Connecticut, CT | CONNECTICUT | 87 FR 21825 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/13/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | Houston-Galveston-Brazoria, TX | TEXAS | 87 FR 21825 | Proposed Approval | Attainment Date Extension Denied |
| 04/13/2022 | Morongo Band of Mission Indians, CA | CALIFORNIA | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | Morongo Band of Mission Indians, CA | CALIFORNIA | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 87 FR 21825 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 04/13/2022 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 87 FR 21825 | Proposed Approval | Failure to Attain by Attainment Date |
| 04/11/2022 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 87 FR 21027 | Final Approval | Redesignation to Maintenance |
| 03/10/2022 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 87 FR 13668 | Proposed Approval | Redesignation to Maintenance |
| 03/03/2022 | Chicago-Naperville, IL-IN-WI | INDIANA | 87 FR 12033 | Proposed Approval | Redesignation to Maintenance |
| 02/07/2022 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 87 FR 6806 | Proposed Approval | Redesignation to Maintenance |
| 06/07/2021 | Kern County (Eastern Kern), CA | CALIFORNIA | 86 FR 30204 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 06/02/2021 | San Diego County, CA | CALIFORNIA | 86 FR 29522 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 04/08/2021 | San Diego County, CA | CALIFORNIA | 86 FR 18227 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 07/13/2020 | Greater Connecticut, CT | CONNECTICUT | 85 FR 41924 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/10/2020 | Inland Sheboygan County, WI | WISCONSIN | 85 FR 41400 | Final Approval | Redesignation to Maintenance |
| 07/10/2020 | Shoreline Sheboygan County, WI | WISCONSIN | 85 FR 41405 | Final Approval | Redesignation to Maintenance |
| 05/13/2020 | Shoreline Sheboygan County, WI | WISCONSIN | 85 FR 28550 | Proposed Approval | Redesignation to Maintenance |
| 04/27/2020 | Inland Sheboygan County, WI | WISCONSIN | 85 FR 23274 | Proposed Approval | Redesignation to Maintenance |
| 04/20/2020 | Chicago-Naperville, IL-IN-WI | INDIANA | 85 FR 21797 | Proposed Approval | Redesignation to Maintenance |
| 04/20/2020 | Greater Connecticut, CT | CONNECTICUT | 85 FR 21796 | Proposed Approval | Correction/Clarification |
| 04/17/2020 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 85 FR 21351 | Proposed Approval | Redesignation to Maintenance |
| 03/27/2020 | Greater Connecticut, CT | CONNECTICUT | 85 FR 17301 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/27/2020 | Imperial County, CA | CALIFORNIA | 85 FR 11817 | Final Approval | 179B Determination |
| 02/05/2020 | Inland Sheboygan County, WI | WISCONSIN | 85 FR 6491 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/05/2020 | Shoreline Sheboygan County, WI | WISCONSIN | 85 FR 6491 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 02/05/2020 | Shoreline Sheboygan County, WI | WISCONSIN | 85 FR 6491 | Proposed Approval | Failure to Attain by Attainment Date |
| 12/26/2019 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 84 FR 70897 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 12/26/2019 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 84 FR 70897 | Final Approval | Failure to Attain by Attainment Date |
| 11/12/2019 | Phoenix-Mesa, AZ | ARIZONA | 84 FR 60920 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/01/2019 | Imperial County, CA | CALIFORNIA | 84 FR 58641 | Proposed Approval | 179B Determination |
| 08/23/2019 | Baltimore, MD | MARYLAND | 84 FR 44238 | Final Approval | Clean Data Determination/Attainment Determination |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | INDIANA | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | INDIANA | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Dallas-Fort Worth, TX | TEXAS | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Dallas-Fort Worth, TX | TEXAS | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Greater Connecticut, CT | CONNECTICUT | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Greater Connecticut, CT | CONNECTICUT | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Houston-Galveston-Brazoria, TX | TEXAS | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Houston-Galveston-Brazoria, TX | TEXAS | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 44238 | Final Approval | Attainment Date Extension |
| 08/23/2019 | Mariposa County, CA | CALIFORNIA | 84 FR 44238 | Final Approval | Clean Data Determination/Attainment Determination |
| 08/23/2019 | Nevada County (Western part), CA | CALIFORNIA | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | Nevada County (Western part), CA | CALIFORNIA | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | San Diego County, CA | CALIFORNIA | 84 FR 44238 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 08/23/2019 | San Diego County, CA | CALIFORNIA | 84 FR 44238 | Final Approval | Failure to Attain by Attainment Date |
| 08/23/2019 | Shoreline Sheboygan County, WI | WISCONSIN | 84 FR 44238 | Final Approval | Attainment Date Extension |
| 08/15/2019 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 84 FR 41674 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/15/2019 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 84 FR 41674 | Proposed Approval | Failure to Attain by Attainment Date |
| 07/16/2019 | Washington, DC-MD-VA | DISTRICT OF COL | 84 FR 33855 | Final Approval | Redesignation to Maintenance |
| 07/15/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 33699 | Final Approval | Area Split |
| 07/15/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 33699 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/15/2019 | Shoreline Sheboygan County, WI | WISCONSIN | 84 FR 33699 | Final Approval | Area Split |
| 06/13/2019 | Phoenix-Mesa, AZ | ARIZONA | 84 FR 27566 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 05/21/2019 | Washington, DC-MD-VA | DISTRICT OF COL | 84 FR 22996 | Proposed Approval | Redesignation to Maintenance |
| 05/07/2019 | Baltimore, MD | MARYLAND | 84 FR 19893 | Reopening of Public Comment Period | Extension of Comment Period |
| 04/18/2019 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 84 FR 16214 | Final Disapproval | Redesignation to Maintenance |
| 04/15/2019 | Washington, DC-MD-VA | MARYLAND | 84 FR 15108 | Final Approval | Redesignation to Maintenance |
| 04/15/2019 | Washington, DC-MD-VA | VIRGINIA | 84 FR 15108 | Final Approval | Redesignation to Maintenance |
| 02/15/2019 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 84 FR 4426 | Proposed Disapproval | Redesignation to Maintenance |
| 02/15/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 4422 | Proposed Approval | Area Split |
| 02/15/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 4422 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 02/15/2019 | Shoreline Sheboygan County, WI | WISCONSIN | 84 FR 4422 | Proposed Approval | Area Split |
| 02/14/2019 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 84 FR 4029 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 02/14/2019 | Pechanga Band of Luiseno Mission Indians of the Pechanga Reservation, CA | CALIFORNIA | 84 FR 4029 | Proposed Approval | Failure to Attain by Attainment Date |
| 02/08/2019 | Baltimore, MD | MARYLAND | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Chicago-Naperville, IL-IN-WI | INDIANA | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Dallas-Fort Worth, TX | TEXAS | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Greater Connecticut, CT | CONNECTICUT | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Houston-Galveston-Brazoria, TX | TEXAS | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Inland Sheboygan County, WI | WISCONSIN | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Mariposa County, CA | CALIFORNIA | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Nevada County (Western part), CA | CALIFORNIA | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | San Diego County, CA | CALIFORNIA | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 02/08/2019 | Shoreline Sheboygan County, WI | WISCONSIN | 84 FR 2858 | Reopening of Public Comment Period | Extension of Comment Period |
| 11/14/2018 | Baltimore, MD | MARYLAND | 83 FR 56781 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | INDIANA | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | INDIANA | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Dallas-Fort Worth, TX | TEXAS | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Dallas-Fort Worth, TX | TEXAS | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 83 FR 56781 | Proposed Approval | Attainment Date Extension |
| 11/14/2018 | Greater Connecticut, CT | CONNECTICUT | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Greater Connecticut, CT | CONNECTICUT | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Houston-Galveston-Brazoria, TX | TEXAS | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Houston-Galveston-Brazoria, TX | TEXAS | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Inland Sheboygan County, WI | WISCONSIN | 83 FR 56781 | Proposed Approval | Attainment Date Extension |
| 11/14/2018 | Mariposa County, CA | CALIFORNIA | 83 FR 56781 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 11/14/2018 | Nevada County (Western part), CA | CALIFORNIA | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | Nevada County (Western part), CA | CALIFORNIA | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | San Diego County, CA | CALIFORNIA | 83 FR 56781 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 11/14/2018 | San Diego County, CA | CALIFORNIA | 83 FR 56781 | Proposed Approval | Failure to Attain by Attainment Date |
| 11/14/2018 | Shoreline Sheboygan County, WI | WISCONSIN | 83 FR 56781 | Proposed Approval | Attainment Date Extension |
| 10/02/2018 | Jamestown, NY | NEW YORK | 83 FR 49492 | Final Approval | Clean Data Determination/Attainment Determination |
| 09/20/2018 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 83 FR 47572 | Final Approval | Redesignation to Maintenance |
| 08/08/2018 | Washington, DC-MD-VA | MARYLAND | 83 FR 39019 | Proposed Approval | Redesignation to Maintenance |
| 08/08/2018 | Washington, DC-MD-VA | VIRGINIA | 83 FR 39019 | Proposed Approval | Redesignation to Maintenance |
| 07/20/2018 | Jamestown, NY | NEW YORK | 83 FR 34506 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/05/2018 | Kern County (Eastern Kern), CA | CALIFORNIA | 83 FR 31334 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 06/25/2018 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 83 FR 29486 | Proposed Approval | Redesignation to Maintenance |
| 05/14/2018 | Kern County (Eastern Kern), CA | CALIFORNIA | 83 FR 22235 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 03/01/2018 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 83 FR 8756 | Final Approval | Redesignation to Maintenance |
| 12/08/2017 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 82 FR 57892 | Proposed Approval | Redesignation to Maintenance |
| 11/14/2017 | Washington, DC-MD-VA | DISTRICT OF COL | 82 FR 52651 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/14/2017 | Washington, DC-MD-VA | MARYLAND | 82 FR 52651 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/14/2017 | Washington, DC-MD-VA | VIRGINIA | 82 FR 52651 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/02/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 82 FR 50814 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/02/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 82 FR 50814 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/02/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 82 FR 50814 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/02/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 82 FR 50814 | Final Approval | Clean Data Determination/Attainment Determination |
| 07/05/2017 | Cincinnati, OH-KY-IN | KENTUCKY | 82 FR 30976 | Final Approval | Redesignation to Maintenance |
| 06/02/2017 | Atlanta, GA | GEORGIA | 82 FR 25523 | Final Approval | Redesignation to Maintenance |
| 05/01/2017 | Cincinnati, OH-KY-IN | KENTUCKY | 82 FR 20297 | Proposed Approval | Redesignation to Maintenance |
| 04/25/2017 | Washington, DC-MD-VA | DISTRICT OF COL | 82 FR 19011 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/25/2017 | Washington, DC-MD-VA | MARYLAND | 82 FR 19011 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/25/2017 | Washington, DC-MD-VA | VIRGINIA | 82 FR 19011 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/18/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 82 FR 18268 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/18/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 82 FR 18268 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/18/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 82 FR 18268 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/18/2017 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 82 FR 18268 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/07/2017 | Cincinnati, OH-KY-IN | INDIANA | 82 FR 16940 | Final Approval | Redesignation to Maintenance |
| 04/06/2017 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 16740 | Final Approval | Correction/Clarification |
| 04/06/2017 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 16740 | Final Approval | Correction/Clarification |
| 01/26/2017 | Baton Rouge, LA | LOUISIANA | 82 FR 8499 | Effective Date Delay to March 21, 2017 | Redesignation to Maintenance |
| 01/11/2017 | Houston-Galveston-Brazoria, TX | TEXAS | 82 FR 3172 | Final Approval | Correction/Clarification |
| 01/06/2017 | Cleveland-Akron-Lorain, OH | OHIO | 82 FR 1603 | Final Approval | Redesignation to Maintenance |
| 12/27/2016 | Baton Rouge, LA | LOUISIANA | 81 FR 95051 | Final Approval | Redesignation to Maintenance |
| 12/27/2016 | Cincinnati, OH-KY-IN | INDIANA | 81 FR 95081 | Proposed Approval | Redesignation to Maintenance |
| 12/23/2016 | Atlanta, GA | GEORGIA | 81 FR 94283 | Proposed Approval | Redesignation to Maintenance |
| 12/21/2016 | Columbus, OH | OHIO | 81 FR 93631 | Final Approval | Redesignation to Maintenance |
| 12/21/2016 | Mariposa County, CA | CALIFORNIA | 81 FR 93653 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 12/21/2016 | Mariposa County, CA | CALIFORNIA | 81 FR 93624 | Direct Final | Clean Data Determination/Attainment Determination |
| 12/21/2016 | San Luis Obispo (Eastern San Luis Obispo), CA | CALIFORNIA | 81 FR 93620 | Final Approval | Clean Data Determination/Attainment Determination |
| 12/19/2016 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 91841 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 12/19/2016 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 91841 | Final Approval | Failure to Attain by Attainment Date |
| 12/19/2016 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 91841 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 12/19/2016 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 91841 | Final Approval | Failure to Attain by Attainment Date |
| 12/16/2016 | Cincinnati, OH-KY-IN | OHIO | 81 FR 91035 | Final Approval | Redesignation to Maintenance |
| 12/14/2016 | Houston-Galveston-Brazoria, TX | TEXAS | 81 FR 90207 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 12/14/2016 | Houston-Galveston-Brazoria, TX | TEXAS | 81 FR 90207 | Final Approval | Failure to Attain by Attainment Date |
| 12/06/2016 | Pittsburgh-Beaver Valley, PA | PENNSYLVANIA | 81 FR 87819 | Final Approval | Clean Data Determination/Attainment Determination |
| 11/04/2016 | Baton Rouge, LA | LOUISIANA | 81 FR 76891 | Proposed Approval | Redesignation to Maintenance |
| 10/17/2016 | Cleveland-Akron-Lorain, OH | OHIO | 81 FR 71444 | Proposed Approval | Redesignation to Maintenance |
| 10/12/2016 | San Luis Obispo (Eastern San Luis Obispo), CA | CALIFORNIA | 81 FR 70382 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 09/28/2016 | Cincinnati, OH-KY-IN | OHIO | 81 FR 66602 | Proposed Approval | Redesignation to Maintenance |
| 09/28/2016 | Columbus, OH | OHIO | 81 FR 66578 | Proposed Approval | Redesignation to Maintenance |
| 09/28/2016 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 66617 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 09/28/2016 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 66617 | Proposed Approval | Failure to Attain by Attainment Date |
| 09/28/2016 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 66617 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 09/28/2016 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 66617 | Proposed Approval | Failure to Attain by Attainment Date |
| 09/27/2016 | Houston-Galveston-Brazoria, TX | TEXAS | 81 FR 66240 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 09/27/2016 | Houston-Galveston-Brazoria, TX | TEXAS | 81 FR 66240 | Proposed Approval | Failure to Attain by Attainment Date |
| 08/25/2016 | Pittsburgh-Beaver Valley, PA | PENNSYLVANIA | 81 FR 58435 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 07/14/2016 | Atlanta, GA | GEORGIA | 81 FR 45419 | Final Approval | Clean Data Determination/Attainment Determination |
| 06/27/2016 | Cleveland-Akron-Lorain, OH | OHIO | 81 FR 41497 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/27/2016 | Cleveland-Akron-Lorain, OH | OHIO | 81 FR 41444 | Direct Final | Clean Data Determination/Attainment Determination |
| 06/27/2016 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 81 FR 41497 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/27/2016 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 81 FR 41444 | Direct Final | Clean Data Determination/Attainment Determination |
| 06/27/2016 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 81 FR 41497 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 06/27/2016 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 81 FR 41444 | Direct Final | Clean Data Determination/Attainment Determination |
| 06/23/2016 | Memphis, TN-MS-AR | TENNESSEE | 81 FR 40816 | Final Approval | Redesignation to Maintenance |
| 05/04/2016 | Allentown-Bethlehem-Easton, PA | PENNSYLVANIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Atlanta, GA | GEORGIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Baton Rouge, LA | LOUISIANA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Calaveras County, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Chicago-Naperville, IL-IN-WI | INDIANA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Chico (Butte County), CA | CALIFORNIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Cincinnati, OH-KY-IN | INDIANA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Cincinnati, OH-KY-IN | KENTUCKY | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Cincinnati, OH-KY-IN | OHIO | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Cleveland-Akron-Lorain, OH | OHIO | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Columbus, OH | OHIO | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Dukes County, MA | MASSACHUSETTS | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Greater Connecticut, CT | CONNECTICUT | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Houston-Galveston-Brazoria, TX | TEXAS | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Imperial County, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Inland Sheboygan County, WI | WISCONSIN | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Jamestown, NY | NEW YORK | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Kern County (Eastern Kern), CA | CALIFORNIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Knoxville, TN | TENNESSEE | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Lancaster, PA | PENNSYLVANIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Mariposa County, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Memphis, TN-MS-AR | ARKANSAS | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Memphis, TN-MS-AR | MISSISSIPPI | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Memphis, TN-MS-AR | TENNESSEE | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Nevada County (Western part), CA | CALIFORNIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Phoenix-Mesa, AZ | ARIZONA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | Pittsburgh-Beaver Valley, PA | PENNSYLVANIA | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Reading, PA | PENNSYLVANIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | San Diego County, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Change to a Higher Classification (Bump-Ups) |
| 05/04/2016 | San Francisco Bay Area, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | San Luis Obispo (Eastern San Luis Obispo), CA | CALIFORNIA | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Seaford, DE | DELAWARE | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Shoreline Sheboygan County, WI | WISCONSIN | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Tuscan Buttes, CA | CALIFORNIA | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Upper Green River Basin Area, WY | WYOMING | 81 FR 26697 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/04/2016 | Washington, DC-MD-VA | DISTRICT OF COL | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Washington, DC-MD-VA | MARYLAND | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/04/2016 | Washington, DC-MD-VA | VIRGINIA | 81 FR 26697 | Final Approval | Attainment Date Extension |
| 05/03/2016 | Atlanta, GA | GEORGIA | 81 FR 26515 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/25/2016 | Memphis, TN-MS-AR | ARKANSAS | 81 FR 24030 | Final Approval | Redesignation to Maintenance |
| 04/19/2016 | Memphis, TN-MS-AR | TENNESSEE | 81 FR 22948 | Proposed Approval | Redesignation to Maintenance |
| 04/08/2016 | Memphis, TN-MS-AR | MISSISSIPPI | 81 FR 20543 | Final Approval | Redesignation to Maintenance |
| 02/11/2016 | Memphis, TN-MS-AR | MISSISSIPPI | 81 FR 7269 | Proposed Approval | Redesignation to Maintenance |
| 02/10/2016 | Memphis, TN-MS-AR | ARKANSAS | 81 FR 7046 | Proposed Approval | Redesignation to Maintenance |
| 12/11/2015 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 80 FR 76865 | Final Approval | Redesignation to Maintenance |
| 10/14/2015 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 80 FR 61775 | Proposed Approval | Redesignation to Maintenance |
| 08/27/2015 | Allentown-Bethlehem-Easton, PA | PENNSYLVANIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Atlanta, GA | GEORGIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Baton Rouge, LA | LOUISIANA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Calaveras County, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Chicago-Naperville, IL-IN-WI | INDIANA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Chico (Butte County), CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Cincinnati, OH-KY-IN | INDIANA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Cincinnati, OH-KY-IN | KENTUCKY | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Cincinnati, OH-KY-IN | OHIO | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Cleveland-Akron-Lorain, OH | OHIO | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Columbus, OH | OHIO | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Denver-Boulder-Greeley-Ft. Collins-Loveland, CO | COLORADO | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Dukes County, MA | MASSACHUSETTS | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Greater Connecticut, CT | CONNECTICUT | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Houston-Galveston-Brazoria, TX | TEXAS | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Imperial County, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Inland Sheboygan County, WI | WISCONSIN | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Jamestown, NY | NEW YORK | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Kern County (Eastern Kern), CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Knoxville, TN | TENNESSEE | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Lancaster, PA | PENNSYLVANIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Mariposa County, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Memphis, TN-MS-AR | ARKANSAS | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Memphis, TN-MS-AR | MISSISSIPPI | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Memphis, TN-MS-AR | TENNESSEE | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Nevada County (Western part), CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | New York-N. New Jersey-Long Island, NY-NJ-CT | CONNECTICUT | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW JERSEY | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | New York-N. New Jersey-Long Island, NY-NJ-CT | NEW YORK | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | DELAWARE | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | MARYLAND | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | NEW JERSEY | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Philadelphia-Wilmington-Atlantic City, PA-NJ-MD-DE | PENNSYLVANIA | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Phoenix-Mesa, AZ | ARIZONA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | Pittsburgh-Beaver Valley, PA | PENNSYLVANIA | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Reading, PA | PENNSYLVANIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | San Diego County, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Change to a Higher Classification (Bump-Ups) |
| 08/27/2015 | San Francisco Bay Area, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | San Luis Obispo (Eastern San Luis Obispo), CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Seaford, DE | DELAWARE | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Shoreline Sheboygan County, WI | WISCONSIN | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | St. Louis-St. Charles-Farmington, MO-IL | ILLINOIS | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | St. Louis-St. Charles-Farmington, MO-IL | MISSOURI | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Tuscan Buttes, CA | CALIFORNIA | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Upper Green River Basin Area, WY | WYOMING | 80 FR 51992 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 08/27/2015 | Washington, DC-MD-VA | DISTRICT OF COL | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Washington, DC-MD-VA | MARYLAND | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 08/27/2015 | Washington, DC-MD-VA | VIRGINIA | 80 FR 51992 | Proposed Approval | Attainment Date Extension |
| 07/28/2015 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 80 FR 44873 | Final Approval | Redesignation to Maintenance |
| 07/13/2015 | Knoxville, TN | TENNESSEE | 80 FR 39970 | Final Approval | Redesignation to Maintenance |
| 06/01/2015 | Baltimore, MD | MARYLAND | 80 FR 30941 | Final Approval | Clean Data Determination/Attainment Determination |
| 05/21/2015 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 80 FR 29250 | Proposed Approval | Redesignation to Maintenance |
| 05/21/2015 | Knoxville, TN | TENNESSEE | 80 FR 29237 | Proposed Approval | Redesignation to Maintenance |
| 03/18/2015 | Baltimore, MD | MARYLAND | 80 FR 14041 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 12/10/2014 | Chicago-Naperville, IL-IN-WI | INDIANA | 79 FR 73205 | Final Disapproval | Redesignation to Maintenance |
| 05/05/2014 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 79 FR 25555 | Proposed Approval | Technical Amendment |
| 05/05/2014 | Charlotte-Rock Hill, NC-SC | NORTH CAROLINA | 79 FR 25508 | Direct Final | Technical Amendment |
| 05/05/2014 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 79 FR 25555 | Proposed Approval | Technical Amendment |
| 05/05/2014 | Charlotte-Rock Hill, NC-SC | SOUTH CAROLINA | 79 FR 25508 | Direct Final | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 79 FR 25555 | Proposed Approval | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | ILLINOIS | 79 FR 25508 | Direct Final | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | INDIANA | 79 FR 25555 | Proposed Approval | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | INDIANA | 79 FR 25508 | Direct Final | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 79 FR 25555 | Proposed Approval | Technical Amendment |
| 05/05/2014 | Chicago-Naperville, IL-IN-WI | WISCONSIN | 79 FR 25508 | Direct Final | Technical Amendment |
| 04/15/2014 | Baton Rouge, LA | LOUISIANA | 79 FR 21178 | Proposed Approval | Clean Data Determination/Attainment Determination |
| 04/15/2014 | Baton Rouge, LA | LOUISIANA | 79 FR 21139 | Direct Final | Clean Data Determination/Attainment Determination |
First Notice