StacksVerified U.S. regulatory reference

40 CFR §58.61

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The Administrator may promulgate criteria similar to that referenced in subpart B of this part for monitoring a pollutant for which an NAAQS does not exist. Such an action would be taken whenever the Administrator determines that a nationwide monitoring program is necessary to monitor such a pollutant.