Mercury is uniquely both a heavy metal and a liquid at room temperature. Only three other elements are liquids at room temperature. Its atomic number is 80. Other metals near it on the Periodic Chart include silver, gold, cadmium, and lead. Gold is the only one of these that is more dense. Being both a metal and liquid had made it both useful and harmful. The usefulness has been known for centuries. The harm we are only beginning to learn.

Mercury has been around for a long time. It was known in ancient China and India and was found in Egyptian tombs built 3500 years ago. Mercury metal is extracted from cinnabar, or mercury sulfide. Cinnabar is mined mostly in Texas, California, Spain and Italy. The metal has been used for years in thermometers, sphygmomanometers, and barometers because it responds to temperature and pressure changes uniformly and because 13 times less mercury is needed in the measuring column than if it contained water. The down side of this is that mercury, mercury vapor, and all soluble salts of mercury are extreme poisons.

In spire of its poisonous nature, mercury has been used in a wide variety of ways. Street lights with a blue tinge are generally mercury vapor lights. Vermillion, which is really mercury sulfide, is used as a ship paint to reduce the problem of barnacles. Mercury has also been used in fluorescent lights. If they are broken indoors, the powder coming out contains enough poisonous mercury vapor to be a health risk. Mercury is also used in dental amalgams and some cosmetics though some claim no health risk has ever been proven. When the author growing up, it was common to paint mercurochrome on a wound with a glass rod to keep the wound from being infected. Today it is outlawed.

Today we are much more aware of the far reaching negative effects of heavy metals on health. In fact, these metals have no known need in the body. Their presence is nearly always negative. They get into our bodies in a variety of ways. More specific for this article, the abundant use of mercury in the past has now poisoned water, land, and seas. Mercury poisoning in fish, especially tuna and swordfish, is a problem and fish must be monitored continually.

Here are a few products using some form of mercury and potentially poisoning us:  adhesives, antiseptics, broken thermometers, cereals, diuretics, floor waxes, grains, laxatives, medications, pesticides, Preparation H, soft contact lens solution, and tattooing.

These are a few of the effects of mercury poisoning on the body: allergy, anxiety, cataracts, depression, dizziness, emotional disturbances, fatigue, kidney damage, pain in limbs, suicidal tendencies, and others. These heavy metals can actually damage DNA increasing the risk of cancer.

Symptoms like those above often include sensory impairment such as vision, hearing, or speech problems, lack of coordination, and disturbed sensation. The type of symptom and the degree of the problem will depend on the individual, the metal causing the poisoning, and the duration of the exposure.

The sheer number of products that have used mercury in the past means it is in most every landfill in the country. From there, mercury can leach into the soil and end up in produce or in the water system. Most city water systems will remove it but if you use well water in cooking or drinking, you might be in danger of mercury poisoning.

The facts are alarming. The affects of these metals may not be seen for years but they are doing their damaging work just the same in yourself and your children. Of course, we can do nothing to eliminate the damaging compounds dumped in landfills in the past. Neither can we deal with present products that are health concerns. But we can limit or eliminate the intake of these metals in ourselves and our families. One sure way to do this is to filter all drinking or cooking water. As an example, an effective activated charcoal filter promises through adsorption, to remove 95% of any mercury and other heavy metals in the water. A low cost activated charcoal filter will not only lower the risk of future problems, but can give present peace of mind. That would be a worthwhile investment!