Oregon Administrative Rules
Chapter 340 - DEPARTMENT OF ENVIRONMENTAL QUALITY
Division 204 - DESIGNATION OF AIR QUALITY AREAS
Section 340-204-0020 - Designation of Air Quality Control Regions
Current through Register Vol. 63, No. 3, March 1, 2024
Oregon's thirty-six counties are divided into five AQCRs. The AQCR boundaries follow county lines, and there are no counties that belong to more than one AQCR. The five AQCRs are as follows:
(1) Portland Interstate AQCR, containing ten counties:
(2) Northwest Oregon AQCR, containing three counties:
(3) Southwest Oregon AQCR, containing five counties:
(4) Central Oregon AQCR, containing eight counties:
(5) Eastern Oregon AQCR, containing ten counties:
NOTE: This rule is included in the State of Oregon Clean Air Act Implementation Plan that EQC adopted under OAR 340-200-0040.
Stat. Auth.: ORS 468.020 & 468A
Stats. Implemented: ORS 468A.025 & 468A.035