Hey came across this site which hosts fish consumption advisories for Colorado:
Which water bodies in Colorado have fish consumption advisories? Fish consumption advisories have been issued for seven water bodies. Of the seven, five lakes and reservoirs are for mercury contamination. They are: McPhee Reservoir, Narraguinnep Reservoir, Sanchez Reservoir, Navajo Reservoir, which are located in the southwest region of the State, and Teller Reservoir, located northwest of Pueblo. Sweitzer Lake, located near Delta, has a fish consumption advisory due to Selenium contamination. The Willow Springs Ponds in El Paso County have a fish consumption advisory due to Perchloroethylene (PCEs), but they are fenced off and not accessible to the public.