Project #4998

Risk Benefit Assessment of Chlorite as a Co-Disinfectant for Nitrification Control in Chloraminated Drinking Water Systems

In Progress
Principal Investigator
Research Manager
Ms. Mary Smith
Louisville Water Company


This research will help the water industry better understand chlorite treatment as a nitrification control technique in chloraminated drinking water systems. The research team will assess the relative risk of feeding chlorite as co-disinfectant vs. other major treatment techniques by applying the EPA’s Comparative Risk Assessment (CRA) Framework. The specific research objectives or goals include:

  1. Understand major chemical and microbial risks in chloramine systems and identify appropriate indicators for use in the risk assessment associated with major nitrification control alternatives
  2. Develop a feasible cumulative and comparative risks assessment methodology for evaluating secondary disinfection treatment
  3. Determine the health risk and cost-effectiveness of combined chloramine/chlorite disinfection vs. major treatment alternatives.

This is the first time the CRA framework will be applied to evaluate the cost benefits of nitrification control strategies. Tailored Collaboration Partner: Louisville Water Company.