{"data":{"id":"us/40-cfr-51.190","jurisdiction":"us","citation":"40 CFR 51.190","heading":"Ambient air quality monitoring requirements.","body":"The requirements for monitoring ambient air quality for purposes of the plan are located in subpart C of part 58 of this chapter.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 51—REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF IMPLEMENTATION PLANS","Subpart J—Ambient Air Quality Surveillance"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"c46c50569dda67510424bef9730dfff0dea2cbad6a0781aa7c7783a0fd1d9c5e","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-51.166","next":"us/40-cfr-51.210"},"notice":"GroundRules: Original legal text. Not legal advice."}