D.C. Mun. Regs. tit. 25-B, § 1506
1506.1 Sewage shall be disposed through an approved facility that is a public sewage treatment plant or an individual sewage disposal system that is sized, constructed, maintained, and operated according to the Plumbing Code.
SOURCE: Final Rulemaking published at 56 DCR 5245 (July 3, 2009).