This article was last updated on substance in June 2010. Please update it further if need be.(See also: Water supply and sanitation in Colombia) Private sector participation (also called "water privatization" or "public-private partnerships", PPP) in water supply and sanitation in Colombia has been more stable and successful than in some other Latin American countries such as Argentina or Bolivia. According to the World Bank, between 1996 and 2007, more than 40 water and sanitation service provision contracts have been awarded to private or mixed companies in Colombia, serving a combined population of 7.3 million or more than 20% of the urban population. According to the Colombian water regulator, there were even more public-private partnerships for water and sanitation in Colombia in 2004