2017 Portage County Water Quality Testing Program – A two page document that explains Portage County’s evaluation of well water conducted in 2017.  Samples were obtained from over 200 private wells throughout the county to measure nitrate-nitrogen, chloride, pH, alkalinity, total hardness and conductivity..

Groundwater in Portage County – Where does it come from?  How and where does it move?

How To Test Your Drinking Water – Lanark residents reply on private wells to access water for drinking and cooking.  This file describes how often to test your water, what to test for, and where to obtain testing.