[[Water resource management]] is the ''implementation'' of policy and is usually carried out over different, more subdivided political, spatial, and geographical domains than policy. It includes policy for "regions, catchments, shared or transboundary water resources, and inter-basin transfers,Policy is a cause of management practices, but best management practices are identified, evaluated, modified and disseminated by policy making bodies"<ref>http://www.gwptoolbox.org/index.php?option=com_tool&id=1</ref>. These policy issues may be subdivided by various means, but broadly concern either the identification, annexation, procurement, maintenance, protection, preservation, expansion of water supply and protection of its quantitative degradation through evaporative loss, water main breakage, waste or constraining qualitative degradation through direct pollution. "Supply isn't just about water production, it is also about distribution infrastructure" <ref> TakaDu p. 9 </ref> Technical issues of the world's aging water infrastructure also includes origination and dissemination of best practices to deal with metering, control systems, and pressure management.Much of policy discussion involves management of competing interests in supply and polluting uses by and between different user classes, with some commentators projecting resource wars as demand exceeds supply throughout most of the globe. <ref> Halcrow p. 27 & etc</ref> User classes of interest to policy making institutions and policy advocates include domestic, industrial, mining and agricultural facilities.<ref>http://www.ecolex.org/ecolex/ledge/view/RecordDetails;document_Law%20on%20Water%20Resources%20Development%20(Law%20No.%2011%20of%201974)..html?DIDPFDSIjsessionid=7DA28E1500FB24F295BD6F41E7070924?id=LEX-FAOC001336&index=documents</ref>
Water resource policy issues are receiving increasing attention. <ref> name= Halcrow http://www.futurewecreate.com/includes/0614Global%20Water%20Security%20PSC%2019%20Oct%20rev1.pdf</ref>It is widely believed that water policy is entering a period of more or less permanent crisis,<ref>http://www.gwp.org/Global/The%20Challenge/Resource%20material/IWRM%20at%20a%20glance.pdf</ref> at least in some regions, and the chilling spectre of worldwide crisis at some point in the future.<ref>http://www.voanews.com/english/news/usa/arts/Fight-for-Water-Hits-Crisis-Levels-Worldwide-118423974.html</ref>Given the complexity of international law, national sovereignty and forecasted water shortages, attention is increasingly focused on various approaches to this complex subject matter.<ref>http://www.cabdirect.org/abstracts/20023193561.html</ref> Organizations such as the Global Water Policy Project have sprung up to promote awareness and prod government and NGO's into heightened awareness of the problems.<ref>http://www.globalwaterpolicy.org</ref>
Various jurisdictions at all levels from international down to small water districts regulate water resources to protect drinkability and agricultural uses from water pollution. Advanced industrial countries typically develope stringent rules which are disseminated worldwide through aid agencies and international agencies such as various departments of the United Nations. Within the developed nations, some localities have more highly developed water regulatory policy analysis, making and implementation bodies in place, due either to general social and ideological concerns or familiarity with specific, often problematic water quality problems.