In hindsight, we were doing the right thing. But now we realize the impact it that can have. Mercury is found in nature in several forms. The most familiar is the metallic mercury used in thermometers. Combined with other chemicals, it can form either organic or inorganic mercury.
Air contains mercury, especially in industrial areas.
Eating large quantities of tuna and swordfish can mean exposure to organic mercury. Exposure to high levels of mercury can affect the central nervous system, kidneys and fetuses. What You Can Do The federal government has developed regulations and guidelines to protect the public, including setting limits on mercury found in water, rivers and lakes, and in the workplace. Check with your state department of fisheries and environmental protection, and your municipality to find out if there are any bans or health advisories on catching and eating local fish. U.S. Agency for Toxic Substances and Disease Registry.