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 "description": "The Clean Water Act requires three components to water quality standards that set goals for and protect each States' waters. The three components are: (1) designated uses that set goals for each water body (e.g., recreational use), (2) criteria that set the minimum conditions to support the use (e.g., bacterial concentrations below certain concentrations) and (3) an antidegradation policy that maintains high quality waters so they are not allowed to degrade to meet only the minimum standards. The designated uses and criteria set the minimum standards for Tier I. Maryland's antidegradation policy has been promulgated in three regulations: COMAR 26.08.02.04 sets out the policy itself, COMAR 26.08.02.04-1, which is discussed here, provides for implementation of Tier II (high quality waters) of the antidegradation policy, and COMAR 26.08.02.04-2 that describes Tier III (Outstanding National Resource Waters or ONRW), the highest quality waters. No Tier III waters have been designated at this time. Tier II antidegradation implementation has the greatest immediate effect on local government planning functions so MDE has prepared this set of Tier II GIS data layers to provide technical assistance to local governments working to complete the Water Resources Element of their comprehensive plans as required by HB 1141. As part of this process, MDE has created a catchment dataset representing the general land area that can directly affect that Tier II stream's segment water quality via run off. The publicly maintained list of all Tier II waters and for further information regarding Maryland's High Quality Waters, Tier II, please visit http://www.mde.state.md.us/ResearchCenter/Data/waterQualityStandards/Antidegradation/index.asp",
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 "copyrightText": "The Maryland Department of the Environment Science Services Administration would like to acknowledge the Maryland Department of Natural Resources' MANTA Division, Maryland Biological Stream Survey Program for providing biological stream sampling station data as well as the associated geospatial information. MDE would also like to acknowledge the U.S.G.S. for their 24,000:1 scale National Hydrography Dataset which was used during the development of this line file.",
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