Minimum depth for the lining of a sanitary well – SPM MCQ

Minimum depth for the lining of a sanitary well is?
A. 10 feet
B. 20 feet
C. 35 feet
D. 50 feet

Correct answer : B. 20 feet

• The lining of a sanitary well should go down at least 20 feet to ensure that water enters from the bottom and not from the sides of the well.
• The lining should extend upwards for about 2-3 feet above the ground.

Ref: Park’s Textbook of Preventive and Social Medicine, 20^th edition, p620