High-Risk Areas
Generally speaking, these are some of the areas around the world where you should not drink the water without treatment (and the disease risks):
- Indian Subcontinent
Cholera, Salmonella, Hepatitis A & E, Amebiasis - Africa
Salmonella, Hepatitis, Giardiasis, Amebiasis - Mexico, Central and South America
Salmonella, Amebiasis, Giardiasis, Hepatitis - Russia and former USSR countries
Giardiasis - Asia
Cholera, Salmonella, Giardiasis
To be safe, water in these areas should always be treated, even in developed areas, with some type of approved biological water filter or portable water filter product that is designed for removal of biological contaminants.