A water well that was recently drilled.  The initial tests indicate that the water had a turbidity of 7.  The well pumped several million gallons into the distribution system and the utility started getting complaints that the water was cloudy.  We checked the turbidity agian and it was 20.  The well has been pumping for about a month now and there has been no change in the turbidity.  What is the problem-please help.The driller installed a 30 minute timer on the well so that it turns on and off to surge the well-mimicing development. 
Also before the production well was drilled the client wanted to do a test well approximately 75 feet away from the production well location.  The well was abondoned once satisfactory water quality results were obtained.  A turbidity of 2.  But could there be some drilling mud influence from the test well causing the increase in turbidity from the production well. 
A well should not typically have turbidity.
Reducing the pumping rate may alleviate sand/turbidity production. Decreasing the pumping rate lowers the water entrance velocity. Therefore, the energy of the water to carry suspended solids is reduced.
The 30 minute timer may be aggravating the problem by surging the well.
A well will also generally remain sand free if the permanent Vacuum pump rate is lower than the discharge rate used during final development.Is the well subject to the influence or surface water or recharge?

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