We take toilets for granted in the United States. We usually have access to safe facilities when we need it.

So, imagine being afraid every time you need to use the toilet. Afraid of being attacked or exposed to a disease.

For more than 1 billion women and girls around the world, those fears are real. They don't feel safe going to the bathroom, according to WaterAid, an international nonprofit group that promotes clean water, decent toilets and good hygiene.

It's about basic dignity and safety for women, says Chilufya Chileshe, WaterAid's regional advocacy manager for southern Africa. "There is a huge amount of burden on them and when it comes to open defecation, for instance, so many communities ... don't have decent toilets and [the women] have to use the bush. And there is fear of rape and sometimes death."

Girls are most likely to miss classes if they are menstruating and their schools do not have private toilets. Or, they will miss school altogether if they don't feel safe.

A child walks through the road, which has no drainage facility and all wastes from hanging toilet go directly to the road, Gojariapara, Gazipur, Bangladesh, April 2017 Credit: WaterAid/ H&M Foundation/ GMB Akash/ Panos

The problem isn't visible enough, she says.

But it doesn't have to be this way. "We talk a lot about access to water and the challenges of people walking and women, especially, walking long distances carrying buckets. But we often don't think about the sanitation ... and the situation women face."

Governments, Chileshe says, have tried to address the problem of people defecating in the open. But improvements have been slow. Between 2005 and 2015, the number of people defecating in the open dropped from 1.2 billion to 892 million. According to WaterAid, India accounts for the vast majority of those people — with 732 million people living without toilets.