';


Title 40 Part 52 → Subpart Q → §52.821

Title 40 → Chapter I → Subchapter C → Part 52 → Subpart Q → §52.821

Electronic Code of Federal Regulations e-CFR

Title 40 Part 52 → Subpart Q → §52.821

e-CFR data is current as of August 19, 2019

Title 40Chapter ISubchapter CPart 52Subpart Q → §52.821


Title 40: Protection of Environment
PART 52—APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS
Subpart Q—Iowa


§52.821   Classification of regions.

The Iowa plan was evaluated on the basis of the following classification:

Air quality control regionPollutant
Particulate matterSulfur oxidesNitrogen dioxideCarbon monoxidePhotochemical oxidants (hydrocarbons)
Metropolitan Omaha-Council Bluffs InterstateIIIIIIIIIIII
Metropolitan Sioux Falls InterstateIIIIIIIIIIIIII
Metropolitan Sioux City InterstateIIIIIIIIIIIIIII
Metropolitan Dubuque InterstateIIIIIIIIIIIII
Metropolitan Quad Cities InterstateIIIIIIIIIIIII
Burlington-Keokuk InterstateIIIIIIIIIII
Northwest Iowa IntrastateIIIIIIIIIIIIIII
North Central Iowa IntrastateIAIIIIIIIIIIII
Northeast Iowa IntrastateIIIIIIIIIIIII
Southwest Iowa IntrastateIIIIIIIIIIIIIII
South Central Iowa IntrastateIIIIIIIIIII
Southeast Iowa IntrastateIIIIIIIIIIIIIII

[37 FR 10865, May 31, 1972, as amended at 39 FR 16346, May 8, 1974]