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

Universal Citation: OR Admin Rules 340-204-0020

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:

(a) Benton County;

(b) Clackamas County;

(c) Columbia County;

(d) Lane County;

(e) Linn County;

(f) Marion County;

(g) Multnomah County;

(h) Polk County;

(i) Washington County;

(j) Yamhill County.

(2) Northwest Oregon AQCR, containing three counties:

(a) Clatsop County;

(b) Lincoln County;

(c) Tillamook County.

(3) Southwest Oregon AQCR, containing five counties:

(a) Coos County;

(b) Curry County;

(c) Douglas County;

(d) Jackson County;

(e) Josephine County.

(4) Central Oregon AQCR, containing eight counties:

(a) Crook County;

(b) Deschutes County;

(c) Hood River County;

(d) Jefferson County;

(e) Klamath County;

(f) Lake County;

(g) Sherman County;

(h) Wasco County.

(5) Eastern Oregon AQCR, containing ten counties:

(a) Baker County;

(b) Gilliam County;

(c) Grant County;

(d) Harney County;

(e) Malheur County;

(f) Morrow County;

(g) Umatilla County;

(h) Union County;

(i) Wallowa County;

(j) Wheeler County.

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

Disclaimer: These regulations may not be the most recent version. Oregon may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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