Yes, it's true. In fact, freshwater fish are more likely to be contaminated than ocean fish. ... What's more, 76 percent of the fish sampled contained mercury levels that exceeded the EPA's safe limit for children under age three who eat fish twice a week.

Do fresh water fish contain mercury?

21, 2009— -- A study released by the U.S. Geological Survey found mercury in every freshwater fish from nearly 300 streams that were tested, an astonishing result because mercury has usually been associated with large saltwater fish.

Is River fish safe to eat?

They are a lean, low-calorie source of protein. Some sport fish caught in the nation's lakes, rivers, oceans, and estuaries, however, may contain chemicals that could pose health risks if these fish are eaten in large amounts. ... Fish taken from polluted waters might be hazardous to your health.