In 1995, Procter & Gamble (P&G) scientists began researching methods of water treatment for use in communities facing water crises. P&G, one of the world's largest consumer products companies, was interested in bringing industrial-quality water treatment to remote areas worldwide, because the lack of clean water, primarily in developing countries, was alarming. In the latter half of the 1990s, approximately 1.1 billion (out of a worldwide population of around 5.6 billion) people lacked access to clean drinking water or sanitation facilities. An estimated 6 million children died annually from diseases, including diarrhea, hookworm, and trachoma, brought about by contaminated water. Many of these deaths were preventable if a water sanitation product was paired with effective education and distribution. With a long history of scientific research and innovation in health, hygiene, and nutrition, P&G considered ways it could address the safe drinking-water crisis as the new millennium approached. Although the company had a vast array of successful products, P&G did not offer anything that involved water purification, either domestically or in developing countries where poverty, lack of infrastructure, and inaccessibility of remote communities made the prospect of cleaning up the water more difficult.

In 1999, P&G purchased-through the acquisition of Recovery Engineering in a $265 million deal-PUR Water Filtration System, a point-of-use water filtration system. The PUR water filtration system used a combination of the flocculant iron sulfate, an agent that caused particles suspended in water to bind and form sediment, and calcium hypochlorite (chlorine), a disinfectant. After acquiring the product, P&G began to develop and expand it. With the success of PUR Water Filtration System, Procter & Gamble Health Sciences Institute (PGHSI) and its partners created the Children's Safe Drinking Water (CSDW) campaign, which targeted developing countries, in 2003. PUR was distributed, often at no cost, to poor countries where the drinking water was not safe, and elsewhere during emergencies: the Asian tsunami, flooding in Haiti, or cholera epidemics in Africa, among others. Through the CSDW program from 2003 to 2007, P&G had provided the sachets at no cost, made no profit on PUR sales, and donated programmatic funding to some of the CSDW projects. Between 2003 and 2007, 85 million sachets of PUR, treating 850 million liters of water, had been distributed globally in emergency response or sold through social marketing projects. With the help of its various partners, PGHSI had made the product available in 23 countries. Procter & Gamble had finally entered the water purification business but had chosen to augment its commercial and retail sales by helping bring clean drinking water to developing countries.