Clean water: Nutrients

Regulation 85 nutrient monitoring.
The regulation includes a continuous monitoring requirement for many waste water dischargers; annual report due by April 15.
Status of nutrient control regulations
In June 2012, the Colorado Water Quality Control Commission adopted nutrient regulatory provisions composed of two major components effluent limits, along with monitoring requirements, laid out in Regulation #85, and numerical values for nutrients to protect classified uses of Colorado waters, contained in Regulation #31. These provisions are being adopted in phases. By 2022, effluent limits will be adopted into the permits of approximately 100 existing domestic facilities and numeric standards will be adopted upstream of existing dischargers. 

In the fall of 2017 the Commission will consider changes to both regulations in a formal rulemaking hearing.  
The water quality forum will hold a series of workgroup meetings to work through the proposed changes included in the scope.

Preliminary analysis of the nutrient monitoring data from 2013 and 2014 shows that the Regulation #85 monitoring requirements provide the division and Colorado's regulated community information that will be useful for determining the appropriate long-term nutrient control strategy for Colorado. 
Both the memo and the report were developed during the triennial review information hearing.
The future of nutrient control regulations in Colorado will be determined through the 2017 and future rulemaking hearings.
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