Since 1950, the U.S. Geological Survey (USGS) has collected and analyzed water-use data for the United States and Territories.
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 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 USGS Web site Water Resources of the United States can direct you to information about your local water body.
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
The terms 'soft water' and 'hard water' are important here. Water is said to be soft if it has a low concentration of calcium and magnesium ions in it, and hard water has a high concentration of calcium and magnesium.
The brown stain is from a large amount of iron in your water. It is closely related to simple rust you see on metal, which is iron oxide.
The depth to the water table can change (rise or fall) depending on the time of year.
No. In groundwater work the USGS puts a lot of effort in measuring the water levels in observation wells.