Agencies Look at Mercury Levels in Fish

The Southwestern Water Conservation District (SWCD) and the U.S. Geological Survey have begun a study on mercury levels in fish in the Dolores/San Juan River Basin. To-date, little data exists of potential sources of this mercury. The state health department has suggested limits on consumption of fish from certain reservoirs since the mid-1980s because of contamination, principally from mercury but also arsenic and selenium. Six reservoirs in Southwest Colorado have a posted consumption advisory because of elevated mercury readings in fish. Those reservoirs are: Jackson Gulch, McPhee, Narriguinnep, Navajo, Totten, and Vallecito