Equitable and sustainable management of water resources is a major global challenge. About one third of the world’s population lives in countries with moderate to high water stress, with proportionately,disproportionately,largely,scarcelyhigh impacts on the poor. With respect to the reactionary,current,few,pastprojected human population growth, industrial development and the expansion of irrigated agriculture in the next two years, water demand is expected to rise to levels that will make the task of providing water for human substitute,sustenance,substance,sustainsmore difficult. Since its establishment, the United Nations Environment Programme (UNEP) has worked to promote sustainable water resources management practices through united,cooperation,collaborative,collaboratingapproaches at the national, regional and global levels. After more than 30 years, water resources management continues to be a strong pillar of UNEP’s work. UNEP is actively participating in addressing water issues together with partner UN sectors,agencies,companies,businesses, other organizations and donors; they facilitate and catalyze water resource assessments in various developing countries; implement projects that assist countries in developing integrated water resource management plans; create awareness of innovative alternative technologies and assist the development, implementation and enforcement of water resource management policies, laws and regulations.