Do MSR filters and purifiers remove chemical contaminants from the water?

MSR filters and purifiers provide microbiologically safe drinking water. Several MSR filters feature a carbon component that reduces some chemical contaminates such as herbicides, pesticides, and volatile organic compounds (VOCs). However, MSR filters or purifiers will not protect you from high chemical concentrations or heavy metal contamination. Do your best to avoid water sources such as mining tailing ponds or those near agricultural operations.