QUESTION
What to do if submersible pump draws muddy water from borewell ?

I have constructed a new borewell in cuddalore district Tamil Nadu. Details of the borewell are given below:

Borewell diameter 8 inch
Casing pipe 6 inch
Borewell depth 40 ft
Water found at 18 ft
Submersible pump at 35 ft
Submersible pump 1 hp
Filter length 12 ft
Soil description Black sandy loam upto 40 ft
 
Please let me know, what should be done if the submersible pump is drawing muddy water. 
 
 
by
16 November 2017