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Water Quality Standards (21 DCMR Ch. 11) (2006) (PDF) (35 pp., 212 K): (Effective February 15, 2006) Regulations establishing water quality standards. Note: The following sections of the water quality standards were not approved by EPA: the first sentence of Note 1, Table 1 in section 1104.8: "This criterion shall apply to E. coli bacteria determined by the Director to be of non-wildlife origin based on best scientific judgment using available information", the second sentence in section 1199: "Such uses are not expected during times of high current velocity, floods, electrical storms, hurricanes, tornadoes, winter temperature, heavy ice conditions, and other adverse natural conditions, and the added definition for "adverse natural conditions."