Is water submetering required for LEED v3 2009?

Water usage is not required to be measured or verified. You will not find that stated except by omission. It is just not included. Submetering is not required by LEED or the IPMVP. The IPMVP only requires you to measure and verify energy savings. This would obviously include all energy fuel sources. You can measure in any way that makes sense for your situation. We did M&V on a small library with no submetering. We gathered the data with spot measurements and short term trending devices. For larger projects with a BAS submetering starts to make sense as the time needed to gather the data by hand could be more costly. I would encourage you to reread the IPMVP and understand the principles behind it. Then evaluate the options you might have for gathering data. Then you will then know what makes for your project.

Hi Marcus, I'm now confused by your comment above. I believe for MPR#6, projects need to provide energy & water data for 5 years. Therefore doesn't water use need to be measured for MPR#6 ? Thanks, Debra

I was responding in the context of EAc5 since that is the forum the question was asked under. Yes for MPR #6 you provide energy and water data. The energy portion of this requirement can earn Option 3 under EAc5 but the water portion is not required for that or either of the other two EAc5 options.

Dear Marcus, Thank you so much for the excellent clarification. Your knowledge and assistance is greatly appreciated! Regards, Debra

Thanks. I live for Thumbs Up! :-)