GC: n

S: UNDP – http://www.undp.ps/en/fsh/43772.pdf (last access: 16 July 2012); WHO – http://www.who.int/water_sanitation_health/publications/aww2.pdf (last access: 7 July 2015); http://www.iwaponline.com/ws/toc.htm (last access: 7 July 2015).

N: 1. – water (n): Middle English, from Old English wæter; akin to Old High German wazzar water, Greek hydōr, Latin unda wave.
– supply (n): early 15c., “assistance, relief, act of supplying,” from supply (v.). Meaning “that which is provided, quantity or amount of something provided” is attested from c. 1600. Meaning “person who temporarily takes the place of another” (especially a minister or preacher) is from 1580s. In the political economy sense (corollary of demand (n.)) it dates from 1776; supply-side (adj.) in reference to economic policy is attested from 1976; as a noun by 1922. Supplies “necessary provisions held for distribution and use” is from c. 1650.
2. Available water provided to fulfill a particular need. If the need is domestic, industrial, or agricultural, the water must fulfill both quality and quantity requirements. Water supplies can be obtained by numerous types of engineering projects, such as wells, dams, or reservoirs.

S: 1. MW – http://www.merriam-webster.com/dictionary/water (last access: 12 January 2016); OED – http://www.etymonline.com/index.php?allowed_in_frame=0&search=supply (last access: 12 January 2016). 2. EncBrit – http://global.britannica.com/science/water-supply (last access: 7 July 2015).

SYN:
S:

CR: food supply, water coverage.