Where are we on numeric nutrient criteria for Lakes, in Missouri?

1. 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.

2. 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
Celebrating 40 years of taking care of Missouri’s natural
resources.
criteria portion of the rule
• 2014 – Department develops alternate nutrient
criteria in response to EPA disapproval

3. Nutrient Criteria Protect Designated Uses
Celebrating 40 years of taking care of Missouri’s natural
resources.
Chl-a
Total P
Total N

4. Celebrating 40 years of taking care of Missouri’s natural
resources.
Nutrient Criteria Follow Ecoregions

5. 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