U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 51Subpart J - Subpart J—Ambient Air Quality Surveillance
View all text of Subpart J [§ 51.190 - § 51.190]
§ 51.190 - Ambient air quality monitoring requirements.

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]
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