A woman carries water she has collected from the Turkwel River near Lodwar in Turkana County, north-west Kenya.
Progress in terms of water and sanitation has traditionally favoured those with money. But the hope with the SDG's is that this gap will be plugged in the future.
The first international water decade was a great success ... so why do we need another?
Clean water can help to break the link between poor hygiene and eye diseases such as trachoma.
Central Australian Aboriginal Media Association (CAAMA)
As Australia joins a New York summit to discuss the UN Sustainable Development Goals, it still faces questions over whether it is meeting water standards at home.
In Africa, more than 315,000 children die every year from diarrhoeal diseases caused by unsafe water and poor sanitation.
There have been modest improvements in water and sanitation provision in Africa, but there is still a long way to go. Most citizens rate their governments’ performance in this sphere poorly.
Patients and companions at the Cholera Treatment Center in Haiti, April 2015.
Andres Martinez Casares
Unless drinking water and sanitation infrastructure are improved, cholera could remain in Haiti indefinitely.
Indian Prime Minister Narendra Modi hits the street with cleaners to promote Swachh Bharat.
Indian Prime Minister Narendra Modi wants to bring 1.5 million toilets to the 600 million Indians without access by 2019. If he fails that could prove dangerous in an election year.
Carrying water in rural Kenya.
Many women in developing countries spend hours every day fetching water for their families. Reducing the burden of water work will improve their health and welfare.
A child collects clean water in Delmas, east of Johannesburg following an outbreak of the deadly typhoid virus.
The danger with typhoid is that symptoms are quite insidious and mimic those of other infectious diseases.
Newly built toilets at Harper transit site in Liberia.
While everyone needs access to proper sanitation to stay healthy, for girls and women it is also an issue of safety and equal participation in society.
Children in Ethiopia wash their hands outside a school latrine.
More than two billion people lack access to decent sanitation. Innovative sanitation technologies can bring toilets into the 21st century with benefits for the developing and developed world.
Ruin of a second-century public toilet in Roman Ostia.
Fr Lawrence Lew, OP
Archaeological and textual detective work is filling in some information about how ancient Romans used and thought about their sewers thousands of years ago.
The treacherous toilet.
Public 'restroom' is a euphemism of the highest order.
Poor sanitation leads to diseases like malnutrition and stunted growth in children. It also makes them sick and unable to attend school.
We know that Africa's cities need better sanitation. But is the global focus on private rather than shared toilets really the best approach?
Residents of Kigali, the capital of Rwanda. Sanitation in the city is extremely poor.
Sanitation is a massive problem in East Africa. On the supply side there are a host of problems which are preventing people from accessing decent sanitation.
The disease can only occur when contaminated water goes up into the nose.
Amoebas are ancient bugs that predate multicellular organisms that often hide in water and mud.
Many schools in Kenya force girls to wear light-coloured uniforms. These show menstrual stains more easily, which shames the girls into staying away from school.
The inclusion of menstrual hygiene in the Sustainable Development Goals marks an important step forward, but to what extent will it address the issue of schoolgirl absenteeism?
Improving maternal mortality and ending preventable deaths in children are some of the health targets in the Sustainable Development Goals.
Department of Foreign Affairs and Trade/Flickr
Health has secured its place as one of the 17 Sustainable Development Goals. But without clear mechanisms to report, finance or engage other sectors, could more end up as less?
New Delhi’s Yamuna River, like much of India’s water, is polluted. The world urgently needs low-carbon ways to clean things up.
Much of the world still lacks access to proper sanitation and clean water - an issue that needs urgent action. But without low-carbon technologies, clean water could come at the expense of the climate.
Millions of people in Africa don’t have access to adequate sanitation.
Despite improvements, there are still millions of people without adequate sanitation in Africa. Sustainable solutions that can be replicated elsewhere are being developed in South Africa.
If achieved, the huge task of cleaning up India will significantly contribute to improving public health.
India's Modi-led progress on sanitation, rivers and life insurance is overshadowed by the need for a professionally staffed public health service.