Quality Water Filters 4 You Posting Page
Monday, August 2, 2010
Selenium is a metal that is found in some water sources. It is considered a water contaminant because ingesting it can cause adverse health effects to humans and pets. One of the most important issues to remember concerning selenium is that while it is naturally produced in deposits of ore containing other elements, it is most commonly deposited into water through human efforts.
The most common uses of selenium compounds can be found in both electronic components as well as in photocopier components. These compounds can also be found rubber, glass, metal alloys, pigments, textiles, photographic emulsions, petroleum, and certain medical therapeutic agents.
Because selenium compounds can be found in so many consumer products and industrial discharges or waste, it is a prime candidate for leaching into ground water sources above or near landfills. It can also reach surface water sources via runoff from landfills.
Another source of selenium in drinking water is through direct or indirect discharge from petroleum and metal refineries, as well as discharges from certain types of mines.
Health problems that may arise in those who drink water contaminated with selenium include numbness in the fingers or in toes, circulatory system problems, and loss of fingernails or loss of hair.
As with all water contaminants that pose risks to human health, the EPA has established an enforceable regulation for selenium, called a maximum contaminant level (MCL), at 0.05 mg/L or 50 ppb (parts per billion).
Water plants that supply water to the public will test for selenium periodically. If they find higher levels than those allowed by law they must notify their customers of the violation within 30 days. They must also take effective steps to correct the violation as quickly as possible.
There are several methods water treatment plants can use to remove or lower the levels of selenium in drinking water. They include: lime softening, activated alumina, coagulation, filtration, reverse osmosis, and electro-dialysis.
Homeowners can further protect themselves and their families by installing quality water filters rated to remove this level of contaminant. Water filters that can handle this type of work come in either point of use devices or whole house water filters. These types of water filters will also remove many other types of contaminants as well.
If you are not sure about your public water, you should contact your water utility and request a copy of their annual water quality report. All community water systems are required to prepare this report once a year and offer it to their customers.
by: Chris Tracey