A study of the effectivity of systems to filter contaminants from groundwater, led by Colorado School of Mines Associate Professor of Civil and Environmental Engineering Christopher Higgins and published in the journal Environmental Science and Technology, has been featured in the Denver Post. From the article: A study of the toxic perfluorinated chemicals found in water near U.S. military airports has measured drinking-water contamination at an undisclosed site at levels more than 100 times higher than a federal health advisory limit. Colorado School of Mines researchers also found that the ....