Disinfection By-Products Rule II

It is well known that certain commonly used drinking water disinfectants can react with naturally occurring materials in the water to form disinfection by-products (DBPs), which may pose various long-term health risks. The Long-Term 2 Enhanced Surface Water Treatment Rule (LT2ESWTR) and the Stage 2 Disinfection By-Product Rule (DBPR) are the second phase of rules required by Congress to strengthen protection against microbial contaminants, especially Cryptosporidium, and at the same time reduce the potential health risks of DBPs. This workshop will examine the factors and causes of DBP formation and the regulatory framework of the Stage 1 and Stage 2 DBPR. Participants will learn:

  • The differences between the Stage 1 and Stage 2 rules
  • Alternative disinfectants and application practices that may reduce or eliminate DBP formation
  • How to conduct an Initial Distribution System Evaluation (IDSE)
  • Categories and deadlines for Stage 2 compliance monitoring

This workshop provides a basic regulatory overview of the DBPR, and the information and resources that will enable an informed decision regarding the best disinfection practices for your public water system.

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