At what depth submersible pumps should be placed?

Can any body help me in solving this? I have a borewell with a depth of 480 ft. Unfortunately, while drilling we encountered mud present at 440 feet along with water. We continued drilling till 480 feet and stopped. Now the concern is at what level the pump should be placed for optimum performance? Also does the water level will improve during rainy seasons?

Sub-Categories

Regions