401 KAR 51:010. Attainment status designations

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Kentucky Administrative Regulations › Title 401 (Energy and Environment Cabinet - Department for Environmental Protection) › Chapter 051 › 401 KAR 51:010

This text was captured on Aug 14, 2026. It is a snapshot, not a live feed, so check the official code before relying on it.

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Section 1. Definitions. (1) "Rest of state" means the remainder of the state has been designated and identified on a county by county basis. (2) "Road" means a Kentucky route, a county road, a lane, or a U.S. route, highway, or interstate. (3) "Statewide" means the entire state has been designated on a county by county basis. Section 2. Attainment Status Designations. (1) The attainment status of areas of the Commonwealth of Kentucky with respect to the ambient air quality standards for carbon monoxide, lead, nitrogen oxides, ozone, particulate matter, and sulfur dioxide shall be as listed in Sections 4 through 10 of this administrative regulation. (2) Within sixty (60) days of revision by the U.S. Environmental Protection Agency (U.S. EPA) of a national ambient air quality standard, the cabinet shall review applicable data and submit to the U.S. EPA a revision to the attainment - nonattainment list pursuant to 42 U.S.C. 7407(d)(1). (3) A road, junction, or intersection of two (2) or more roads that delineates a nonattainment boundary for an area that is a portion of a county designated as nonattainment for ozone for any classification except marginal, shall include as nonattainment an area extending 750 feet from the center of the road, junction, or intersection. Section 3. Attainment Timetable. Primary and secondary ambient air quality standards shall be attained as expeditiously as practicable. Section 4. Attainment Status Designations for Carbon Monoxide (CO). 1971 Standard: Section 5. Attainment Status Designations for Lead (Pb). 2008 Standard: Section 6. Attainment Status Designations for Nitrogen Oxides (NO 2 ). (1) 1971 Annual Standard: (2) 2010 One (1) Hour Standard: Section 7. Attainment Status Designations for Ozone (O 3 ). (1) The 1971 One (1) Hour Standard was revoked effective June 15, 2005, for all areas in the Commonwealth of Kentucky

(CO). 1971 Standard: Section 5. Attainment Status Designations for Lead (Pb). 2008 Standard: Section 6. Attainment Status Designations for Nitrogen Oxides (NO 2 ). (1) 1971 Annual Standard: (2) 2010 One (1) Hour Standard: Section 7. Attainment Status Designations for Ozone (O 3 ). (1) The 1971 One (1) Hour Standard was revoked effective June 15, 2005, for all areas in the Commonwealth of Kentucky. The Cincinnati-Hamilton, Edmonson County, Huntington-Ashland, Lexington-Fayette, Louisville, Owensboro, and Paducah areas shall be considered maintenance areas for the one (1) hour national ambient air quality standards for the purposes of 40 C.F.R. Part 51, Subpart X. (2) 1997 Eight (8) Hour Primary and Secondary Standard: (3) 2008 Eight (8) Hour Primary and Secondary Standard: (4) 2015 Eight (8) Hour Primary and Secondary Standard: Section 8. Attainment Status Designations for PM 2.5 . (1) 1997 Annual Primary and Secondary Standard: (2) 2012 Annual Primary Standard: (3) 1997 Twenty-four (24) Hour Primary and Secondary Standard: (4) 2006 Twenty-four (24) Hour Primary and Secondary Standard: Section 9. Attainment Status Designations for Sulfur Dioxide (SO 2 ). (1) 1971 Primary and Secondary Standard: (2) 2010 Primary Standard: Section 10. Attainment Status Designations for Total Suspended Particulates (TSP). 1971 Standard:

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