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Drinking Water Contaminants- Mercury

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This is a factsheet about a chemical that may be found in some public or private drinking water supplies. It may cause health problems if found in amounts greater than the health standard set by the United States Environmental Protection Agency (EPA). What is Mercury and how is it used? Mercury is a liquid metal found in natural deposits as ores containing other elements. Electrical products such as dry-cell batteries, fluorescent light bulbs, switches, and other control equipment account for 50% of mercury used. Why is Mercury being regulated? In 1974, Congress passed the Safe Drinking Water Act. This law requires EPA to determine safe levels of chemicals in drinking water which do or may cause health problems. These non-enforceable levels, based solely on possible health risks and exposure, are called Maximum Contaminant Level Goals. The MCLG for mercury has been set at 2 parts per billion (ppb) because EPA believes this level of protection would not cause any of the potential health problems described below. Based on this MCLG, EPA has set an enforceable standard called a Maximum Contaminant Level (MCL). MCLs are set as close to the MCLGs as possible, considering the ability of public water systems to detect and remove contaminants using suitable treatment technologies. The MCL has also been set at 2 ppb because EPA believes, given present technology and resources, this is the lowest level to which water systems can reasonably be required to remove this contaminant should it occur in drinking water. These drinking water standards and the regulations for ensuring these standards are met, are called National Primary Drinking Water Regulations. All public water supplies must abide by these regulations. What are the health effects? Short- or Long-term: EPA has found mercury to potentially cause the following health effects when people are exposed to it at levels above the MCL for relatively short periods of time: kidney damage. How much Mercury is produced and released to the environment? Large amounts of mercury are released naturally from the earths crust. Combustion of fossil fuels, metal smelters, cement manufacture, municipal landfills, sewage, metal refining operations, r most notably, from chloralkali plants are important sources of mercury release. Nearly 8 million lbs. of mercury were produced in the U.S. in 1986. From 1987 to 1993, according to EPAs Toxic Chemical Release Inventory, mercury releases to land and water totaled nearly 68,000 lbs. These releases were primarily from chemical and allied industries. The largest releases occurred in Tennessee and Louisiana. The largest direct releases to water occurred in West Virginia and Alabama. What happens to Mercury when it is released to the environment? Mercury is unique among metals in that it can evaporate when released to water or soil. Also, microbes can convert inorganic forms of mercury to organic forms which can be accumulated by aquatic life. How will Mercury be detected in and removed from my drinking water? The regulation for mercury became effective in 1992. Between 1993 and 1995, EPA required your water supplier to collect water samples once and analyze them to find out if mercury is present above 2 ppb. If it is present above this level, the system must continue to monitor this contaminant every 3 months. If contaminant levels are found to be consistently above the MCL, your water supplier must take steps to reduce the amount of mercury so that it is consistently below that level. The following treatment methods have been approved by EPA for removing mercury: Coagulation/Filtration; Granular Activated Carbon; Lime softening; Reverse osmosis. How will I know if Mercury is in my drinking water? If the levels of mercury exceed the MCL, the system must notify the public via newspapers, radio, TV and other means. Additional actions, such as providing alternative drinking water supplies, may be required to prevent serious risks to public health. This is a factsheet about a chemical that may be found in some public or private drinking water supplies. It may cause health problems if found in amounts greater than the health standard set by the United States Environmental Protection Agency (EPA). Drinking Water Standards: MCLG: 2 ppb MCL: 2 ppb Mercury Releases to Water and Land, 1987 to 1993 (in pounds):   Water Land TOTALS 6,971 60,877 Top Six States TN 164 29,161 LA 431 21,829 DE 117 3,860 OH 29 2,760 AL 1,462 4,001 WV 1,657 454 Major Industries* Chemical, allied products 12,269 74,720 Electric lamps 0 2,750 Paper mills 2,500 0 As part of the Drinking Water and Health pages, this fact sheet is part of a larger U.S. EPA publication: EPA National Primary Drinking Water Regulations

We at reverse-osmosis-water-filter-guide.com is dedicated to help you find the best reverse osmosis drinking water filter systems. Our site discuss the "must-read" of buying reverse osmosis filters, topics including:

• How to find a top quality reverse osmosis water filter..the facts you need to know before you buy
• Reviews of different water filtration methods and of major brands/configurations of reverse osmosis water filters
• How to test your water so you know your reverse osmosis system is working in its top condition.
• Is bottled water really the safest? How does it compare to reverse osmosis purification systems?
• What are the different types of bottled water and their quality? What type of drinking water is the safest and healthiest
• Does your area have a water pollution problem? How many and which contaminants can reverse osmosis filters effectively remove?
• How do reverse osmosis filters give you the purest water? Reverse osmosis filtration technology explained in detail.
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Editor's Note: Do You Know What's In The Water That You're Drinking?
In 1993, the City of Milwaukee Wisconsin experienced a sad tragic event. People died from contamination in the public water supply. Cryptosporidium cysts poisoned over 100,000 people. Over 1000 people were hospitalized and nearly 100 people died. As a result of this, Milwaukee changed their water treatment facilities. People deserve safe, clean water both for drinking and for bathing. No one wants to wonder whether or not they are going to be poisoned by their water supply..
Water filtration should be the answer however studies have shown that many water filters out there only remove a small percentage of these harmful contaminants. We are promoting reverse osmosis technology because reverse osmosis has proved itself to be the ultimate and the most economical water purification method.