40 CFR 51.190 - Ambient air quality monitoring requirements.

Regulations last checked for updates: Feb 13, 2026

Title 40 - Protection of Environment last revised: Dec 22, 2026

Table of Contents

The requirements for monitoring ambient air quality for purposes of the plan are located in subpart C of part 58 of this chapter.

[44 FR 27569, May 10, 1979]

authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.

source: 36 FR 22398, Nov. 25, 1971, unless otherwise noted.

cite as: 40 CFR 51.190