The Missouri Department of Natural Resources (MDNR) has begun the formal process of setting nutrient water quality criteria for streams and rivers in the State, as required under section 304(a) of the Clean Water Act. This is the second phase of a process approved by US EPA in 2005 to set water quality standards for specific nutrients in waters of the State. This process was detailed in the document "Nutrient Criteria Plan".
Nutrient criteria for lakes and reservoirs have already been drafted and are scheduled for submission into the rulemaking process as a part of revision to Water Quality Standards.
MDNR began conducting public meetings in February 2009 to solicit input into the development of nutrient criteria for streams and rivers.
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