ItIn is[[developing difficult to visualize the issue of SSO in perspectivecountries]], sincemost underdevelopedwastewater countriesis dischargestill mostnot oftreated theproperly sewagebut they create as effluentdischarged into the environment. Even a highly industrialized developing country such as the [[People's Republic of China]] dischargesdischarged in 2001 about 55 percent of all sewage without treatment of any type.<ref>"[[World Bank]] Supports China's Wastewater Treatment", ''The People’s Daily'', November 30, 2001, Beijing</ref> In a relatively developed [[Middle East]]ern country such as [[Iran]], the majority of [[Tehran]]'s population has totally untreated sewage injected to the city’s groundwater.<ref>Massoud Tajrishy and Ahmad Abrishamchi, "Integrated Approach to Water and Wastewater Management for [[Tehran]], [[Iran]]", [[Water Conservation]], Reuse, and Recycling: Proceedings of the Iranian-American Workshop, National Academies Press (2005)</ref> In [[Venezuela]], a below-average country in [[South America]] with respect to wastewater treatment, 97 percent of the country’s [[sewage]] is discharged rawuntreated into the environment.<ref>Appropriate Technology for Sewage Pollution Control in the Wider [[Caribbean]] Region, Caribbean Environment Programme Technical Report #40 1998</ref> Most of [[sub-Saharan Africa]] is without wastewater treatment, contributing to the excessive [[infant]] death rates in that region.
While developedDeveloped countries such as the United States, [[Canada]], most [[Western Europe]]an states, [[Australia]] and [[Japan]] are considered to be struggling with a public health problem of SSO prevention, the [[underdeveloped countries]] of the world discharge approximately. 20However,000 times the amountmagnitued of raw sewage into the environment as those advanced countries collectively, approximately (the equivalent of) 100 trillion U.S. gallons (380 km³) of untreated sewage per year. This dichotomy of expenditure and [[public health]] benefitproblem is arguablymuch thegreater greatestin disparitymost betweendeveloping developed and underdeveloped nations as of the year 2006countries.{{citation needed|date=June2010}}
