Imagine going through your day without ready access to clean water for drinking, cooking, washing or bathing. Around the world, 663 million people face that challenge every day. They get their water from sources that are considered unsafe because they are vulnerable to contamination, such as rivers, streams, ponds and unprotected wells. And the task of providing water for households falls disproportionately to women and girls.

Water, a human right, is critical for human survival and development. A sufficient supply of biologically and chemically safe water is necessary for drinking and personal hygiene to prevent diarrheal diseases, trachoma, intestinal worm infections, stunted growth among children and numerous other deleterious outcomes from chemical contaminants like arsenic and lead.

I have carried out research in India, Bolivia and Kenya on the water and sanitation challenges that women and girls confront and how these experiences influence their lives. In my field work I have seen adolescent girls, pregnant women and mothers with small children carrying water. Through interviews, I have learned of the hardships they face when carrying out this obligatory task.

An insufficient supply of safe and accessible water poses extra risks and challenges for women and girls. Without recognizing the uneven burden of water work that women bear, well-intentioned programs to bring water to places in need will continue to fail to meet their goals.