Site Feedback

Title 40

Displaying title 40, up to date as of 7/15/2026. Title 40 was last amended 7/14/2026.
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 60Standards of Performance for New Stationary Sources60.1 – 60.6685
Subpart BBBBEmission Guidelines and Compliance Times for Small Municipal Waste Combustion Units Constructed on or Before August 30, 199960.1500 – 60.1940
Model Rule—Continuous Emission Monitoring60.1715 – 60.1770
§ 60.1715What types of continuous emission monitoring must I perform?
§ 60.1720What continuous emission monitoring systems must I install for gaseous pollutants?
§ 60.1725How are the data from the continuous emission monitoring systems used?
§ 60.1730How do I make sure my continuous emission monitoring systems are operating correctly?
§ 60.1735Am I exempt from any appendix B or appendix F requirements to evaluate continuous emission monitoring systems?
§ 60.1740What is my schedule for evaluating continuous emission monitoring systems?
§ 60.1745What must I do if I choose to monitor carbon dioxide instead of oxygen as a diluent gas?
§ 60.1750What is the minimum amount of monitoring data I must collect with my continuous emission monitoring systems and is the data collection requirement enforceable?
§ 60.1755How do I convert my 1-hour arithmetic averages into appropriate averaging times and units?
§ 60.1760What is required for my continuous opacity monitoring system and how are the data used?
§ 60.1765What additional requirements must I meet for the operation of my continuous emission monitoring systems and continuous opacity monitoring system?
§ 60.1770What must I do if any of my continuous emission monitoring systems are temporarily unavailable to meet the data collection requirements?