Celebrating 40 years of taking care of Missouri’s natural resources.

REGFORM – Missouri Water Seminar

September 4, 2014

Numeric Nutrient Criteria

John Hoke, Missouri DNR

Celebrating 40 years of taking care of Missouri’s natural resources.

History of Numeric Nutrient Criteria in Missouri

• 2009 – Numeric nutrient criteria for lakes approved by Missouri Clean Water Commission, submitted to EPA

• 2011 – EPA disapproves most of the nutrient criteria portion of the rule

• 2014 – Department develops alternate nutrient criteria in response to EPA disapproval

Celebrating 40 years of taking care of Missouri’s natural resources.

Nutrient Criteria Protect Designated Uses

Chl-aTotal P

Total N

Celebrating 40 years of taking care of Missouri’s natural resources.

Nutrient Criteria Follow Ecoregions

Celebrating 40 years of taking care of Missouri’s natural resources.

Numeric Nutrient Criteria Schedule

• Regulatory Impact Report developed to estimate economic and environmental costs and benefits

• Proposed rulemaking will include public comment period and public hearing

• Rule to be effective 2015/2016