Code of Federal Regulations > Title 40 > Chapter I > Part 53 - PART 53—AMBIENT AIR MONITORING REFERENCE AND EQUIVALENT METHODS

Regulations last checked for updates: May 21, 2025

Title 40 - Protection of Environment last revised: Apr 21, 2028

Subpart A [§ 53.1 - § 53.16] - Subpart A—General Provisions

Subpart B [§ 53.20 - § 53.23] - Subpart B—Procedures for Testing Performance Characteristics of Automated Methods for SO2, CO, O3, and NO2

Subpart C [§ 53.30 - § 53.35] - Subpart C—Procedures for Determining Comparability Between Candidate Methods and Reference Methods

Subpart D [§ 53.40 - § 53.43] - Subpart D—Procedures for Testing Performance Characteristics of Methods for PM 10

Subpart E [§ 53.50 - § 53.59] - Subpart E—Procedures for Testing Physical (Design) and Performance Characteristics of Reference Methods and Class I and Class II Equivalent Methods for PM 2.5 or PM 10-2.5

Subpart F [§ 53.60 - § 53.66] - Subpart F—Procedures for Testing Performance Characteristics of Class II Equivalent Methods for PM 2.5

authority: Sec. 301(a) of the Clean Air Act (42 U.S.C. sec. 1857g(a)), as amended by sec. 15(c)(2) of Pub. L. 91-604, 84 Stat. 1713, unless otherwise noted

source: 40 FR 7049, Feb. 18, 1975, unless otherwise noted.