Which regulation includes Giardia reduction credits for conventional treatment with disinfection?

Which regulation includes Giardia reduction credits for conventional treatment with disinfection?

• A. Interim Enhanced Surface Water Treatment Rule
• B. Surface Water Treatment Rule
• C. Total Coliform Rule
• D. Filter Backwash Recycle Rule

Answer: (A)

Giardia reduction credits for conventional treatment with disinfection are provided by the Interim Enhanced Surface Water Treatment Rule. This regulation added enhanced treatment requirements and explicitly allows credits for Giardia removal when a plant uses conventional treatment with disinfection, influencing how compliance is assessed. The other rules focus on different areas: the original Surface Water Treatment Rule sets filtration and disinfection standards, the Total Coliform Rule addresses coliforms in the distribution system, and the Filter Backwash Recycle Rule deals with backwash water management, not Giardia credits.

Giardia reduction credits for conventional treatment with disinfection are provided by the Interim Enhanced Surface Water Treatment Rule. This regulation added enhanced treatment requirements and explicitly allows credits for Giardia removal when a plant uses conventional treatment with disinfection, influencing how compliance is assessed. The other rules focus on different areas: the original Surface Water Treatment Rule sets filtration and disinfection standards, the Total Coliform Rule addresses coliforms in the distribution system, and the Filter Backwash Recycle Rule deals with backwash water management, not Giardia credits.