Sustainable water means water self-sufficiency: ensuring there is enough water to meet needs, from agriculture to municipal and industrial. It also means consistent water supply, despite climate change impact, such as a lack of rainfall and drought, or too much rain and lack of flood resilience. Sustainable water also means that economics stack up in matching supply and demand and the water delivery process is as efficient as possible. Water sustainability, meanwhile, can also mean energy neutrality by coupling traditional water treatment technologies with renewable energies.