Except as specified in subpart G of this part and paragraph (c) of this section, all gasoline designated as summer gasoline or located at any location in the United States during the summer season is subject to a maximum RVP per-gallon standard in this section.
Table 1 to Paragraph (a)(2)-Federal 7.8 psi RVP Areas
Area designation | State | Counties |
Denver-Boulder-Greeley-Ft. Collins-Loveland | Colorado | Adams Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, Larimer,1 Weld.2 |
Reno | Nevada | Washoe. |
Portland | Oregon | Clackamas (only the Air Quality Maintenance Area), Multnomah (only the Air Quality Maintenance Area), Washington (only the Air Quality Maintenance Area). |
Salem | Oregon | Marion (only the Salem Area Transportation Study), Polk (only the Salem Area Transportation Study). |
Beaumont-Port Arthur | Texas | Hardin, Jefferson, Orange. |
Salt Lake City | Utah | Davis, Salt Lake. |
1 That portion of Larimer County, CO that lies south of a line described as follows: Beginning at a point on Larimer County's eastern boundary and Weld County's western boundary intersected by 40 degrees, 42 minutes, and 47.1 seconds north latitude, proceed west to a point defined by the intersection of 40 degrees, 42 minutes, 47.1 seconds north latitude and 105 degrees, 29 minutes, and 40.0 seconds west longitude, thence proceed south on 105 degrees, 29 minutes, 40.0 seconds west longitude to the intersection with 40 degrees, 33 minutes and 17.4 seconds north latitude, thence proceed west on 40 degrees, 33 minutes, 17.4 seconds north latitude until this line intersects Larimer County's western boundary and Grand County's eastern boundary. (Includes part of Rocky Mtn. Nat. Park.)
2 That portion of Weld County, CO that lies south of a line described as follows: Beginning at a point on Weld County's eastern boundary and Logan County's western boundary intersected by 40 degrees, 42 minutes, 47.1 seconds north latitude, proceed west on 40 degrees, 42 minutes, 47.1 seconds north latitude until this line intersects Weld County's western boundary and Larimer County's eastern boundary.
Table 2 to Paragraph (b)(3)(ii)-Areas Excluded From the Ethanol 1.0 psi Waiver
State | Counties | Effective date |
Illinois | All | April 28, 2025. |
Iowa | All | April 28, 2025. |
Minnesota | All | April 28, 2025. |
Missouri | All | April 28, 2025. |
Nebraska | All | April 28, 2025. |
Ohio | All | April 28, 2025. |
South Dakota | All | April 28, 2025. |
Wisconsin | All | April 28, 2025. |
40 C.F.R. §1090.215