This document discusses selective extraction, a technique to improve water quality from groundwater wells. It summarizes a case study where selective extraction was used on a well in Lee County, Texas. Dynamic profiling identified zones of high contaminant levels, such as color and iron. Solutions included sleeving off shallow screens and grouting the deepest screen to block poor quality zones. This improved water quality, reducing total iron levels by over 95%. The water provider was initially skeptical but saw benefits from applying new diagnostic methods rather than traditional approaches.