Could you tell me what would have caused our well water to become dirty after a home inspector did a flow test on our septic system? He left all the faucets in the house running full blast for a very long time in order to put dye in the line to trace the septic field. After that, the well water was very dirty and he took his sample from the dirty water and told us it wouldn't pass. We lost the sale of our house. We had previously taken a water sample and there was no problem other than hard water and some iron ore. We were advised after the flow test to do a chlorination process, which we did, and the water is now perfectly clear. But why did the flow test mess up our water?