When did the Long-Term 2 Enhanced Surface Water Treatment Rule take effect for large systems?

When did the Long-Term 2 Enhanced Surface Water Treatment Rule take effect for large systems?

• A. 2000
• B. 2003
• C. 2004
• D. 2006

Answer: (D)

The key idea is the timeline for when LT2 Enhanced Surface Water Treatment requirements became enforceable. The rule was finalized in 2006, marking the year it took effect and large surface water systems had to start complying with the enhanced treatment, filtration, and monitoring requirements designed to reduce pathogens like Cryptosporidium. The other years listed are before the rule existed or before it became enforceable, so 2006 is the correct year the rule took effect for large systems.

The key idea is the timeline for when LT2 Enhanced Surface Water Treatment requirements became enforceable. The rule was finalized in 2006, marking the year it took effect and large surface water systems had to start complying with the enhanced treatment, filtration, and monitoring requirements designed to reduce pathogens like Cryptosporidium. The other years listed are before the rule existed or before it became enforceable, so 2006 is the correct year the rule took effect for large systems.