Transcription of Class 3 and 4 Water Quality Standards Revisions
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Version Date: November 18, 2010 Technical Support Document Summary: University of Minnesota Class 3 and Class 4 water quality standards Review Minnesota Surface Water Quality Investigation Industrial Supply, irrigation and Livestock Uses June 29, 2010 Introduction: The following summary provides a brief overview regarding possible changes to the State s Class 3 (Industrial Consumption) and Class 4 (Agriculture and Wildlife) Water Quality Standards found in Minn. R. and Minn. R. , respectively. This summary was completed by MPCA staff based on their review of the University of Minnesota (U of M) Class 3 and Class 4 water quality standards Review report and correspondence with the U of M authors. Background Information: The Class 3 and the Class 4 Standards were first adopted into rule on a state-wide basis in the late 1960s and have remained largely unchanged since that time.
instances, the Class 3 and Class 4 water quality standards translate into "end of pipe" limitations; often times protecting a resource that, due to its low flow characteristics, does not provide sustainable water for either industrial or irrigation purposes.
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