PO-04 Poster - Water and Contamination in Colorado Download Publication Details This full-color poster illustrates how human-caused and natural water contamination occurs and how it affects Colorado’s water supply. Digital PDF download. PO-04D Citations Scott, Larry. “PO-04 Poster Water and Contamination in Colorado.” Colorado Geological Survey, Division of Minerals and Geology, Department of Natural Resources, 2005. https://doi.org/10.58783/cgs.po04.qmrd2182. CGS Publications. https://coloradogeologicalsurvey.org/publications/water-contamination-colorado-poster/.