Muddy water from borewell

From last two years I'm getting muddy water from bore well. Need solutions

Dear Experts, We have a borewell in our house at Dharshiwa, kunwargadh, Raipur (CG). The depth is about 375 feet. Rock was hit at around 60ft and the casing is done upto 80 feet. The submersible pump is fixed at 250ft. We have been using the borwell for 2 years. The water from borewell is muddy. In & around our house, the water from borewells is clear. Please let me the possible reasons for getting muddy water & what could be the solution?