Hey M&P777
PM me as much information pertaining to your well as you have knowledge of: Bedrock or gravel well, age of well, gpm rating of well when drilled, depth of well, static water level, submersible, shallow well or jet pump, "constant pressure system" or conventional pressure tank, switch & pump, steel or PVC casing, description of sand, horsepower & gpm rating of pump, etc.
If you can obtain a copy of the "Well Log" that might also be helpful. In Indiana, they are submitted by the driller to the Indiana Department of Natural Resources and available online. I do not know your state's requirements.
I'll see if I can't come up with some answers for you.
DO NOT call to have a new well drilled yet! There are MANY possibilities as to why sand is suddenly present and some of the solutions are relatively inexpensive.
George
Indiana Licensed Well Driller
Member: Indiana Groundwater Asociation
Member: National Groundwater Association.