I just noticed water in the area around my well casing. I could not see exactly where the leak was coming from, nothing obvious at the above ground joints, but there is a pile of watery grey grease that is building up next to the casing. The pile of grease is about 3" high which seems like a lot. My residential well is 135 ft deep. Where is the grease coming from and, dare I ask, is this really bad?