Chemistry

Minerals must be mined from the ground, either by surface, underground, or drilling methods. Sand and gravel is usually mined in surface pits or rock is crushed to size, gold is mined in surface pits, underground mines, and in streams and rivers.  
Birds: Information on Salton Sea bird die-offs can be found through the USGS National Wildlife Health Center Web site.   Information has been issued by the center through their Quarterly Wildlife Mortality Report.Fish: There are several species of...
You can view a national map of hardness in surface water at water hardness map. Hardness data (reflecting mostly calcium, plus a little magnesium) for individual drinking-water suppliers can be found at this link EPA Office of Ground Water and Drinking...
It is not an easy task to keep a swimming pool so clear and clean. If you just set a pan of water outdoors in the middle of summer, you'll see that it ends up containing gunk very quickly. People have to resort to both chemical and physical means to keep...
Information on pesticides and herbicides and on nutrients is available from the USGS National Water-Quality Assessment Program 
The salinity of Great Salt Lake is measured by taking specific gravity and temperature measurements and comparing them to standardized values reported in a table. Specific gravity is measured in the field by testing a water sample with a device very...
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....
The earth is estimated to hold about 1,460,000,000 cubic kilometers of water. The breakdown of where all that water resides is estimated as follows:Oceans (saline) 1,419,120,000 cubic kilometersIce caps and glaciers (fresh) 31,244,000 cubic...
Sulfur is not regulated as a primary drinking-water contaminant, so there is no official level of sulfur that represents a threshold between healthy and unhealthy concentrations. Sulfur is required by all living things as part of their normal metabolism...
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...