Water contamination
Drinking water contains three groups of pathogenic microorganisms:
| Family | Known germs | Size range |
| Viruses | Hepatitis A, Norwalk Virus, Rotavirus, Poliovirus | ~0.02 - 0.2 microns |
| Bacteria | E-coli (Escherichia coli), Salmonella (Salmonella typhimurium), Cholera (Vibrio cholerae) | 0.2 - 5 microns |
| Protozoans | Amoeobiasis (Entamoeba histolytica), Giardia lamblia (Giardia intestinalis), Cryptosporidium (Cryptosporidumparvum) | 1 - 15 microns |
Source: Osmonics, Inc.
A large number of additional pathogens are known besides the germs listed above. But according to WHO, their pathogenic (disease-inducing) action is only slight, or they are primarily absorbed along with food.

Viruses

Bacteria

Protozoans
Download our overview of pathogens and diseases
- Selection Card Bacteria EN Web

- AmOEbAE High risk Moderate risk OVERVIEW OF PATHOGENS AND DISEASES DIFFERENT COUNTRIES, DIFFERENT RISKS Every country and continent has to deal with various pathogens in the drinking water. The world maps provide an overview of the distribution of...
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