Searching Books & More : "Water quality--Government policy--Pennsylvania"
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Ambient water quality criteria recommendations information supporting the development of state and tribal nutrient criteria for rivers and streams in nutrient ecoregion VII-mostly glaciated dairy region including all or parts of the states of New York, Pennsylvania, Michigan, Wisconsin, Minnesota, Ohio, Indiana, Illinois, Iowa and the authorized Tribes within the Ecoregion
Published:[Washington, D.C.] : United States Environmental Protection Agency, Office of Water, Office of Science and Technology, Health and Ecological Criteria Division, 
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