Code of Federal Regulations > Title 40 > Chapter I > Part 58 - PART 58—AMBIENT AIR QUALITY SURVEILLANCE

U.S. Code of Federal Regulations

Regulations most recently checked for updates: Feb 11, 2026

Subpart A [§ 58.1 - § 58.3] - Subpart A—General Provisions

Subpart B [§ 58.10 - § 58.16] - Subpart B—Monitoring Network

Subpart C [§ 58.20 - § 58.20] - Subpart C—Special Purpose Monitors

Subpart D [§ 58.30 - § 58.30] - Subpart D—Comparability of Ambient Data to the NAAQS

Subpart E - Subpart E [Reserved]

Subpart F [§ 58.50 - § 58.50] - Subpart F—Air Quality Index Reporting

Subpart G [§ 58.60 - § 58.61] - Subpart G—Federal Monitoring

Appendix Appendix A -

Appendix Appendix B - Appendix B to Part 58—Quality Assurance Requirements for Prevention of Significant Deterioration (PSD) Air Monitoring

Appendix Appendix C - Appendix C to Part 58—Ambient Air Quality Monitoring Methodology

Appendix Appendix D - Appendix D to Part 58—Network Design Criteria for Ambient Air Quality Monitoring

Appendix Appendix E - Appendix E to Part 58—Probe and Monitoring Path Siting Criteria for Ambient Air Quality Monitoring

Appendix Appendix F - Appendix F to Part 58 [Reserved]

Appendix Appendix G - Appendix G to Part 58—Uniform Air Quality Index (AQI) and Daily Reporting