HHS: Disinfection Of Wells

Disinfection Of Wells

Health Hygiene & Sanitation

Lesson 27 : Water Purification

Purification Of Water On A Small Scale

Wells are the main source of water supply in the rural areas. The need often arises to disinfect them, sometimes on a mass scale, during epidemics of cholera and gastroenteritis. The most effective and cheapest method of disinfecting wells is by bleaching powder. Potassium permanganate should not be used as it is not a satisfactory disinfecting agent.

Steps in Well Disinfection

Find the volume of water in a well
Find the amount of bleaching powder required for disinfection
Dissolve bleaching powder in water
Delivery of chlorine solution into the well
Allow a contact period of one hour before the water is drawn for use
Orthotolidine arsenite test

Last modified: Wednesday, 25 April 2012, 10:03 AM

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      - Purification Of Water On A Small Scale
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