Although covering some 70% of the Earth's surface, most water is saline. Freshwater is available in almost all populated areas of the earth, although it may be expensive and the supply may not always be sustainable. Sources where water may be obtained include:

See also

  • Sewage collection: most systems (in the developed world) use a combined sewage/potable water system

Notes and references


Interwiki links

Cookies help us deliver our services. By using our services, you agree to our use of cookies.