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  • Arsenic Levels Over 20 Parts Per Billion
    338 words
    Arsenic in Water Person 1- For our table topic we are doing "EPA urges tough rules on arsenic". The Environmental Protection agency has concluded that it must adopt a new standard for the amount of arsenic allowed in the nation's drinking water that is at least as though as the one proposed by the Clinton administration, officials said yesterday. Christie Whitman recommend a limit of arsenic allowed in the nation's drinking water after the National Academy of Sciences stated the health risks pos...
  • Waters Transition From Fresh To Salt
    449 words
    The Keys To Unlocking Transitions in Water When examining waters transition from fresh to salt as well as from salt to fresh one quickly finds the importance of estuaries. In terms of geology, present-day estuaries are young and ephemeral coastal features. Today's estuaries began to take their current form during the last interglacial period, when sea level rose about 120 m (Braun 36). However, the relatively high sea levels and extensive estuaries found today have been characteristic of only ab...
  • Water With Fluoride At Optimal Levels
    1,235 words
    Fluoride Fluoride is a mineral that occurs naturally in almost all foods and water supplies. The fluoride ion comes from the element fluorine. Fluorine, the 13th most abundant element in the earth's crust, is never encountered in its free state in nature. It exists only in combination with other elements as a fluoride compound. Fluoride is effective in preventing and reversing the early signs of tooth decay. Researchers have shown that there are several ways through which fluoride achieves its d...
  • Pollution Levels In Water
    913 words
    Water quality is a complex term to evaluate. The health of a water ecosystem depends on so many things. These parameters are each intertwined and connected. For simplicity there are several mainstream parameters that are used in conjunction with each other to determine the water's quality. These include: alkalinity, ammonia content, carbon dioxide, chlorine, nitrates, dissolved oxygen, phosphates, temperature, and turbidity. The most visible sign of poor water quality remains to be animal popula...
  • High Levels Of Lead In Their Water
    3,130 words
    There are nearly 55,000 community water systems in this country, supplying water to meet the drinking needs of more than 90 percent of the U.S. population. The Environmental Protection Agency (EPA) defines a community water source as one that consistently provides water to at least twenty-five percent for at least sixty days during the course of a year. Living in Washington, D.C., this is a very personal issue at this point in time. Over the summer, we have dealt with serious testing on the qual...
  • Oxygen Deficient Cooler Water
    664 words
    Research Dissolved oxygen infers to the volume of oxygen that is contained in water. Oxygen enters water through photosynthesis and across the water interface. The amount of oxygen that can be held by the water depends on the water pressure, salinity, and temperature. Gas solubility increases with decreasing temperature; thus colder water holds more oxygen. A reason why freshwater holds more oxygen than does saltwater is because gas solubility increases with decreasing salinity. When there is a ...
  • Your Outdoor Pool
    676 words
    How to Open and Close an Outdoor Pool If you have never opened or closed your outdoor pool before, and you are in any doubt as to your ability to do so, you would be better off calling your local pool center to do the job for you. However, if you are somewhat familiar with pool care and are willing to undertake the work yourself, the following guidelines should be provide adequate information to help you along the way. First, we will begin with opening your outdoor pool. Begin by removing any su...
  • Radon Level In Your Home
    666 words
    THE RADON PROBLEM You can't see radon. And you can't smell or taste it, but it may very well be a problem in your home. It is estimated to cause many thousands of deaths each year. Radon is a cancer-causing, radioactive gas, and when you breathe air containing the gas, you can get lung cancer. In fact, radon has now been declared the second leading cause of lung cancer in the United States today. Only smoking causes more lung cancer deaths. If you smoke and your home has high radon levels, your ...
  • Average Height Of 10 Pneumetaphores
    900 words
    Introduction: Plants when grow in areas of bad conditions such as waterlogged soils must be able to deal with environmental extremes not experienced by other plants. Mangroves live in the swamp, bathed twice a day by the sea and having their roots in waterlogged soils which are devoid of oxygen, poorly drained, rich in organic matter and anoxic. Because of the lack of oxygen in the soils, mangroves rely on numerous erect aerial roots called pneumetaphores, the mangrove's breathing roots, to obta...
  • High Levels Of Pcbs
    1,654 words
    Polychlorinated biphenyls, or commonly referred to as PCBs, are mixtures of up to 209 individual chlorinated compounds. There is no evidence of a natural source of these congeners, and they are either oily liquids or solids that are colorless and sometimes a light yellow. PCBs have been used as coolants and lubricants in transformers, capacitors, and other electrical equipment because of they do not burn easily and serve as good insulators. Many of these commercial PCB mixtures are known in the ...

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