Water supply and sanitation
Vietnam has 2,360 rivers with an average annual discharge of 310 billion m3. The rainy season accounts for 70% of the year's discharge.[365] Most of the country's urban water supply systems have been developed without proper management within the last 10 years. Based on a 2008 survey by the Vietnam Water Supply and Sewerage Association (VWSA), existing water production capacity exceeded demand, but service coverage is still sparse. Most of the clean water supply infrastructure is not widely developed. It is only available to a small proportion of the population with about one third of 727 district towns having some form of piped water supply.[366] There is also concern over the safety of existing water resources for urban and rural water supply systems. Most industrial factories release their untreated wastewater directly into the water sources. Where the government does not take measures to address the issue, most domestic wastewater is discharged, untreated, back into the environment and pollutes the surface water.[366]
In recent years, there have been some efforts and collaboration between local and foreign universities to develop access to safe water in the country by introducing water filtration systems. There is a growing concern among local populations over the serious public health issues associated with water contamination caused by pollution as well as the high levels of arsenic in groundwater sources.[367] The government of Netherlands has been providing aid focusing its investments mainly on water-related sectors including water treatment projects.[368][369][370] Regarding sanitation, 78% of Vietnam's population has access to "improved" sanitation—94% of the urban population and 70% of the rural population. However, there are still about 21 million people in the country lacking access to "improved" sanitation according to a survey conducted in 2015.[371] In 2018, the construction ministry said the country's water supply, and drainage industry had been applying hi-tech methods and information technology (IT) to sanitation issues but faced problems like limited funding, climate change, and pollution.[372] The health ministry has also announced that water inspection units will be established nationwide beginning in June 2019. Inspections are to be conducted without notice, since there have been many cases involving health issues caused by poor or polluted water supplies as well unhygienic conditions reported every year.[373]