U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 52Subpart I - Subpart I—Delaware
View all text of Subpart I [§ 52.420 - § 52.465]
§ 52.421 - Classification of regions.

The Delaware plan was evaluated on the basis of the following classifications:

Air quality control region Pollutant
Particulate matter Sulfur oxides Nitrogen dioxide Carbon monoxide Photochemical oxidants (hydrocarbons)
Metropolitan Philadelphia InterstateIIIIIII
Southern Delaware IntrastateIIIIIIIIIIIIIII
[37 FR 10856, May 31, 1972, as amended at 39 FR 16345, May 8, 1974]
© 2016 GovRegs | About | Disclaimer | Privacy