Exceptional TN Waterbodies
Tennessees water quality standards require the incorporation of the antidegradation policy into regulatory decisions (Chapter 1200-4-3-.06). Part of the responsibility the policy places on the Division of Water Pollution Control is identification of exceptional Tennessee Waters (previously know as Tier 2) and Outstanding National Resource Waters (Tier 3). In exceptional waters, degradation cannot be authorized unless (1) there is no reasonable alternative to the proposed activity that would render it non-degrading and (2) the activity is in the economic or social interest of the public. In Outstanding National Resource Waters, no new discharges, expansions of existing discharges, or mixing zones will be permitted unless such activity will not result in measurable degradation of the water quality. The Division of Water Pollution Control has compiled the list of waters based on the characteristics of Exceptional Tennessee Waters and Outstanding National Resource Waters set forth in the regulation by the Tennessee Water Quality Control Board. In general, these are waterbodies with good water quality, important ecological values, valuable recreational uses, and outstanding scenery. Wherever possible, the Division has utilized objective measures to apply these characteristics and the basis for each listing is provided.
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