D.C. Mun. Regs. tit. 25-F, § 411
411.1 Water from a public water system or potable water shall meet the requirements of the applicable provisions of 40 C.F.R. Part 141 (National Primary Drinking Water Regulations), and District of Columbia drinking water quality standards.
411.2 Potable water shall be used for drinking and sanitizing of tanning equipment and devices.
SOURCE: Final Rulemaking published at 60 DCR 3582 (March 15, 2013).