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Water to Drink

Water to Drink. Section 5 Chapter 12. Where does your drinking water come from?. Cities/towns – public supply of water; the community collects, treats and distributes water to the residents Our water comes from the Savannah River!

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Water to Drink

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  1. Water to Drink Section 5 Chapter 12

  2. Where does your drinking water come from? • Cities/towns – public supply of water; the community collects, treats and distributes water to the residents • Our water comes from the Savannah River! • Rural areas – private supply; mainly water comes from private wells.

  3. Water Quality • Water quality measures the amount of substances in water besides water molecules! • In the US, the EPA (Environmental Protection Agency) determines the water quality standards. • They determine what CONCENTRATION of certain substances are allowed to be in our drinking water. • CONCENTRATION: the amount of one substance in a certain volume of another substance. For water, ppm and ppb are often used.

  4. Water Quality Factors • 1) Acidity (pH) - the pH measures how acidic or basic the water is. The pH scale is 0-14. Pure water has a pH of 7. Below 7 is acidic and above 7 is basic. Acidic water can dissolve unwanted metals into the water! • 2) Hardness – The level of Mg and Ca in the water is called the hardness. Hard – high levels of Mg and Ca ( won’t form suds) Soft – low levels of Mg and Ca • Disease-Causing Organisms - determined by a COLIFORM count; coliform bacteria is human/animal wastes; a high coliformcount shows that there may be other disease causing bacteria.

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