A New, Green Method for Nitrate Monitoring: Gaining ATP Approval

Increasing regulatory requirements and Colorado Regulation 85 nutrient monitoring requirements have prompted utilities, permit holders, and compliance labs to evaluate more efficient and cost effective ways to meet compliance limits and nutrient monitoring guidelines. The City of Ft. Morgan WWTP is permitted to use the several methods for nitrate measurement. In late 2012, analysts in the Ft. Morgan lab began to question the reliability of their ISE method. Given these issues, the utility began a search for an improved method for measuring nitrate and other nutrient parameters. This paper will discuss challenges faced by utilities in today’s environment and new methods that have been developed to address these challenges. The authors will discuss how hands-on analyst time and outsourcing fees have been reduced while accuracy and precision of results have improved. Analysts and operators will also gain an understanding of the guidelines for alternative method use and the process for applying for ATP approval.