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Water: State, Tribal & Territorial Standards

Repository of Documents: Washington, DC

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Water Quality Standards (21 DCMR Ch. 11) (2010) (PDF) (32 pp, 432K)
(Effective December 27, 2010) Regulations establishing water quality standards.  Provisions are in effect for Clean Water Act purposes, with the exception of Section 1104.8. Please refer to the revised Section 1104.8 below.
Section 1104.8, Water Quality Standards (21 DCMR Ch.11) (2014) (PDF) (12 pp, 338K)
(Effective February 4, 2014) This section contains updated numeric criteria and replaces the section posted in the 2010 standards. Please refer to the 2010 document, posted above, for the effective water quality standards in the remaining sections.

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