StacksVerified U.S. regulatory reference

40 CFR §63.9301

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
You may use either a continuous parameter monitoring system (CPMS) or a continuous emission monitoring system (CEMS) to demonstrate compliance with the emission limitations. Continuous monitoring systems must meet the requirements in § 63.9306 (CPMS) and § 63.9307 (CEMS).