Contamination

The air pressure in the ground around most houses is often greater than the air pressure inside the house. Thus, air tends to move from the disturbed zone, resulting from its construction, into the house through openings in the house's foundation. All...
Radon is a radionuclide. Radionuclides are radioactive isotopes  (unstable forms of elements). Radioactivity is the release of energy in the form of gamma rays and energetic alpha and beta particles, which occurs when unstable elements decompose to form...
Bioremediation is the process by which microbes (generally bacteria) or plants transform a harmful water contaminant into a non-harmful substance, much as we turn sugar into carbon dioxide and water. Bioremediation can help clean up ground water...
Information on pesticides and herbicides and on nutrients is available from the USGS National Water-Quality Assessment Program 
Different treatment is used depending on the source of your water. Ground water taken from wells has been filtered through rocks, so it is usually quite free of particles. It can still contain chemicals and organic matter that must be taken out, though....
There are many different kinds of treatments depending on what contaminant is in the water. Biological contamination is usually treated by heat (boiling) or by filtration. Inorganic contaminants dissolved in the water can be removed by distillation or...
Yes, it is called reclaimed wastewater, though its use is limited. Before you start to feel ill, no, it is not used further down the line as drinking water. It is most often used for irrigation and for water parks and golf courses. In the U.S. in 1995...
Saline water has some uses. In 2000, the U.S. used about 62 billion gallons per day of saline water, which was about 15 percent of all water used. But saline water can only be used for certain purposes. The main use was for thermoelectric power-plant...
You can get an idea as to how concerned you should be about radon in your house by learning about the geology of the site and its radon potential. If your house is in an area with a high potential for radon, then chances are that your house may have an...
It is possible that there may have been a mutation in the virus that is causing a higher number of species to be affected this year. There is currently no evidence of significant mutation in the U.S. strain of WNV since its discovery in 1999, but many...