Ambient water quality criteria recommendations information supporting the development of state and tribal nutrient criteria for lakes and reservoirs in nutrient ecoregion VI : Corn Belt and Northern Great Plains, including all or parts of the states of South Dakota, North Dakota, Nebraska, Kansas, Minnesota, Iowa, Illinois, Wisconsin, Indiana, Michigan, Ohio and authorized Tribes within the ecoregion.
- Water quality Middle West
Water Pollution Middle West
Nutrient pollution of water Middle West
Water quality Standards Middle West
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