StacksVerified U.S. regulatory reference

40 CFR §501.21

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
As of December 21, 2020, state sludge management programs must comply with 40 CFR part 3 and 40 CFR part 127 (including the applicable required data elements in appendix A to part 127).