1. Would you want to drink this?

3. Salmonella – causes fever, vomiting and dehydration Anabaena - causes death (breathing stops) Naegleria - attacks the nervous system 98% of infected people die Cryptosporidium - causes diarhoea and death by dehydration

4. E. coli Chaetomium Rotifers

6. 2.5 billion people in the world do not have access to adequate sanitation, (1 in 3 of the world's population.) Lack of access to clean water and sanitation kills children at a rate equivalent of a jumbo jet crashing every four hours. More people have a mobile phone than a toilet. The 2015 goal to halve the proportion of people living without sanitation is running 150 years behind schedule in sub-Saharan Africa.

7. Women in Africa and Asia often carry water on their heads weighing 20kg, the same as the average UK airport luggage allowance Every 21 seconds, a child dies from diarrhoea Diarrhoea is the second biggest killer of children under five years old worldwide. Hygienic practices such as washing hands with soap can reduce the risk of diarrhoea by 50%