Under pressure from the US Environmental Protection Agency (EPA), in 2009 the Missouri Department of Natural Resources (DNR) promulgated water quality standards setting numeric criteria for nitrogen and phosphorus in lakes. In 2011 EPA disapproved Missouri’s lake numeric nutrient criteria (NNC).

Dissatisfied with DNR’s progress toward developing revised lake NNC, the Missouri Coalition for the Environment sued in an effort to compel EPA to set NNC for Missouri. Under the resulting settlement agreement, EPA committed to propose revised lake NNC for Missouri by December 2017, unless by then the agency approved revised NNC submitted by DNR. In December 2017 EPA issued for public comment proposed lake NNC for Missouri. In January 2018 the Missouri Clean Water Commission (CWC) approved revised lake NNC, which DNR submitted to EPA upon completion of procedures for rulemaking as required by state law.

MOFB participated in DNR’s stakeholder discussions, presented testimony before the CWC, submitted comments to the EPA and participated in roundtable meetings with EPA officials. MOFB supports DNR’s proposed lake NNC, which await final action by EPA.