The 2016 water quality study is a continuation of work performed by the Coalition for the Upper South Platte (CUSP) in 2011, 2012, 2013, 2014, 2015 and 2016. The current scope of work involves continued monitoring of wells identified in earlier studies and additional groundwater sampling of wells and springs. There were 11 wells in the alluvium, 18 wells in the Cretaceous Seaway Sedimentary Formations, 10 wells in the Laramide sedimentary formations, 8 wells in the Precambrian granitic bedrock, and 2 wells in the Antero lacustrine formations. All data was entered into the Colorado Data Sharing Network. Alias IDs were used to protect private property owners. BLM will also use the data in their Master Leasing Plan for Oil and Gas. The additional monitoring will determine if a delicate equilibrium exists that keeps saline groundwater separate from near surface fresh water. They will collect data from 33 wells and 10 springs. This data will be added to the existing database. Maps will be developed and integrated in the County Geology and Groundwater Resources web page.