The only approved system for pool water shall be potable water from the District of Columbia public water system.
Existing aquatic facilities shall have at least one (1) drinking fountain directly plumbed and maintained in good repair or shall have at least one (1) water cooler inside the facility.
If a drinking fountain cannot be provided inside the aquatic facility, it shall be provided in a common use building or area adjacent to the aquatic facility entrance and on the normal path of bathers going to the aquatic facility entrance.
D.C. Mun. Regs. tit. 25, r. 25-C400