StacksVerified U.S. regulatory reference

40 CFR §62.9121

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Letter from the Oklahoma Department of Environmental Quality, dated November 14, 2011, certifying that there are no known existing sewage sludge incineration (SSI) units subject to 40 CFR part 60, subpart MMMM, within its jurisdiction.