<prompt> Minimum depth for the lining of a sanitary well is5 meters6 meters7 meters8 meters  <response>: The lining of a sanitary well should go down at least 6 meters 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 60-90cm 2-3 feet above the ground.Park 23rd edition pg: 709 