A frequent cause of musty, earthy odors, especially toward the end of the summer, is naturally occurring organic compounds derived from the decay of plant material in lakes and reservoirs. The odors can be objectionable, but generally are not harmful to...
The U.S. Geological Survey (USGS) collects data about the country's surface water, such as how much water is flowing in our streams and rivers, and when a river reaches "flood stage". Groundwater is studied—the amount of water stored in underground...
The USGS provides access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico. Online access to this data is organized around the categories listed to the left.The USGS...
Information is available through the Mercury Research in the USGS Web page. 
The best way to learn about your local drinking water quality is to read the annual drinking water quality report/consumer confidence report that water suppliers now send out by July 1 of each year. The reports often are sent out with water bills, but...
The USGS Web site Water Resources of the United States can direct you to information about your local water body. Under the heading "Local Information" click on "Local Websites and USGS Contacts in Your State!" There you can select your state on a map to...
The U.S. Environmental Protection Agency has contaminant-specific fact sheets for many drinking water contaminants on their Web page Drinking water and health: What you need to know. Click on "What are the health effects of contaminants in drinking water...
A good source of information on home drinking-water treatment technology and performance of specific products is NSF International, which offers a listings database for products on their Consumer Information page. 
Water leaving our homes generally goes either into a septic tank in the back yard where it evaporates or seeps back into the ground, or is sent to a sewage-treatment plant through a sewer system. In 1995, about 26 percent of the water coming from our...
This seems like a pretty straightforward question, but there are some interesting issues that come up in making a response.First, the words "pure" and "natural" don't really mean the same thing. Pure water is a kind of theoretical concept, it means water...