{"data":{"id":"us/40-cfr-appendix-f-to-part-58","jurisdiction":"us","citation":"40 CFR Appendix F to Part 58","heading":"Appendix F to Part 58 [Reserved]","body":"","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 58—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":"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-appendix-e-to-part-58","next":"us/40-cfr-appendix-g-to-part-58"},"notice":"GroundRules: Original legal text. Not legal advice."}