The regulatory framework that includes a limit for chlorite is part of which EPA rule?

The regulatory framework that includes a limit for chlorite is part of which EPA rule?

• A. Safe Drinking Water Act
• B. Groundwater Rule
• C. Stage 1 Disinfectants and Disinfection Byproducts Rule
• D. Surface Water Treatment Rule

Answer: (C)

Chlorite limits come from rules that govern disinfection byproducts and disinfectants used in drinking water. Chlorine dioxide, when used for disinfection, can form chlorite, so the EPA created specific limits under the Stage 1 Disinfectants and Disinfection Byproducts Rule to control exposure and protect public health. This rule addresses limits for both disinfectants and disinfection byproducts, including chlorite. Other options don’t specifically set chlorite limits: the Safe Drinking Water Act is the broad law, the Groundwater Rule focuses on groundwater safety, and the Surface Water Treatment Rule centers on treatment requirements for surface water.

Chlorite limits come from rules that govern disinfection byproducts and disinfectants used in drinking water. Chlorine dioxide, when used for disinfection, can form chlorite, so the EPA created specific limits under the Stage 1 Disinfectants and Disinfection Byproducts Rule to control exposure and protect public health. This rule addresses limits for both disinfectants and disinfection byproducts, including chlorite. Other options don’t specifically set chlorite limits: the Safe Drinking Water Act is the broad law, the Groundwater Rule focuses on groundwater safety, and the Surface Water Treatment Rule centers on treatment requirements for surface water.