name four diseases that can be cause by improper drainage system Share with your friends Share 7 Priyanka Bansal answered this Diarrhoea, gastroenteritis, hepatitis A and typhoid. 11 View Full Answer Muskan Sharma answered this 1 diarrhoea 2 thyroid3 cholera4Hepatitis 12 Sushmita answered this The 4 diseases caused by improper drainage systems are :1. dysentry 2. cholera3. typhoid4. Hepatitis A 3