If you are the type of person who enjoys relaxing by the lake, Colorado is a state that does not disappoint. From blue lakes at over 10,000 feet to reservoirs just outside of Denver, you are never far away from a fun day near the water.
Not every lake in Colorado is 100% safe for both fishing and fun on the water. Some are polluted—not by factories, but by microcystin (toxic algae), iron, selenium, and arsenic. These elements come from a mix of natural geology and human activity. The lakes below rank among the most affected in our state.
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