Compare this graph to "Precipitation vs Change in Total Disolved Solids". Ground water wells 5 and 8 have the highest conductivity readings and are affected most by precipitation events. Again, these wells are closest to the surface at their respective well nests and are located directly next to walkways and roadways where salt is administered by the university. Ground water well 2 is located on the Fleming lawn away from salting areas and therefore has the lowest conductivity reading.