Abuja - WaterAid Nigeria said on Tuesday that only 31 percent of Nigerians had access to improved sanitation while 112 million others lacked the facility.
This is contained in a statement to mark the World Toilet Day, signed by Oluseyi Abdulmalik, the Communication and Campaigns Manager of the organisation in Abuja.
According to the statement, 37 million Nigerians, representing 23 percent of the population, still practise open defecation, with only two years to the 2015 deadline to meet the Millennium Development Goals.
The statement also noted that nearly 100 000 children under five die of diarrhea in the country annually due to poor level access to sanitation and water.
It further said that the lack of decent sanitation also affected productivity and livelihoods.
"It is not just about the unhygienic conditions; without a private toilet, women and girls are vulnerable to violence, intimidation and indignity.”
It said that the lack of such essential services had created a "massive crisis for developing countries, undermining health systems, education, economic development, and progress on gender equality".
It listed other impediments to include poor water, sanitation and hygiene.
According to the statement, the World Bank has estimated that for every $1 invested in sanitation, $8 was returned to the economy.
This it noted, could be one of the most effective investments that Nigeria could make to grow its economy.
It expressed regret that in spite of the numerous national and international commitments, politicians were still not paying adequate attention to the poor sanitation situation in the country.
"The Nigerian Government has pledged to increase the rate of sanitation access from 31 percent currently to 65 percent and water access from 61 per cent to 75 percent by 2015.
"These are ambitious targets, particularly considering that Nigeria is one of the few African countries where the rate of access to sanitation actually fell from 37 percent in 1990 to 31 percent this year."