Which two items are specifically targeted by LT1ESWTR turbidity performance standards?

Which two items are specifically targeted by LT1ESWTR turbidity performance standards?

• A. Giardia and viruses
• B. Turbidity and color
• C. Cryptosporidium and CFE
• D. E. coli

Answer: (C)

The Turbidity performance standards under LT1ESWTR focus on how well filtration removes particles that could harbor pathogens, with Cryptosporidium as the main organism of concern. The rule uses the combined filter effluent (CFE) turbidity as the practical measure of filtration performance. Keeping CFE turbidity within specified limits ensures that the filtration process is effectively reducing particulates that could carry Cryptosporidium, which is resistant to disinfection and a key safety target for surface water treatment. Therefore, the two items targeted are Cryptosporidium and the CFE turbidity itself as the performance indicator. Other options don’t fit because the standard emphasizes Cryptosporidium removal through the CFE turbidity measure, not Giardia/viruses specifically, turbidity/color as separate targets, or E. coli.

The Turbidity performance standards under LT1ESWTR focus on how well filtration removes particles that could harbor pathogens, with Cryptosporidium as the main organism of concern. The rule uses the combined filter effluent (CFE) turbidity as the practical measure of filtration performance. Keeping CFE turbidity within specified limits ensures that the filtration process is effectively reducing particulates that could carry Cryptosporidium, which is resistant to disinfection and a key safety target for surface water treatment. Therefore, the two items targeted are Cryptosporidium and the CFE turbidity itself as the performance indicator. Other options don’t fit because the standard emphasizes Cryptosporidium removal through the CFE turbidity measure, not Giardia/viruses specifically, turbidity/color as separate targets, or E. coli.