US-based LEED (Leadership in Energy and Environmental Design) assesses building projects in 160 countries giving points across several categories, including water, which address sustainable issues.

LEED-certified buildings are resource efficient.

They use less water and energy and reduce greenhouse gas emissions. As an added bonus, they save money.

LEED certification means healthier, more productive places, reduced stress on the environment by encouraging energy and resource-efficient buildings, and savings from increased building value, higher lease rates and decreased utility costs.