What factors affect water quality?

1
What factors affect water quality?

• Most people in the US get their water from a
  reservoir or an aquifer.

2
Water Quality

• Water Quality measurement of substances in water
  besides the water molecules.
• Certain substances (Fe) can affect the taste or
  color of the water but are not harmful unless
  present in large quantities. Other substances (E
  Coli) are harmful in very small amounts.
• Concentration amount of one substance in a
  certain volume of another substance.

3
Factors That Affect Quality

• Acidity determined by the pH of a substance.
  Pure water has a pH of 7neutral. Can cause
  problems by dissolving lead from pipes it passes
  through.

• Hardness combined level of 2 minerals-calcium
  and magnesium. Does not form suds.
• Disease-Causing Organisms E Coli and high
  coliform counts

4
Treating Drinking Water

1. Filtration
2. Coagulation
3. Settling Basins
4. Second Filtration
5. Chlorination
6. Aeration
7. Additional Treatment

5
Treating Drinking Water
6
Treating Drinking Water
7
Water Distribution

• After treatment, water is ready to be distributed
  to homes and businesses.
• From a treatment plant, water goes to a central
  pumping station.
• Water pressure causes water to move through a
  system of pipes.
• Pumping stations are designed to keep water
  pressure steady throughout the system.

8
Treating Wastewater

• Sewage wastewater and different kinds of waste
  in it.
• 2 ways communities deal with sewage wastewater
  treatment plants and septic systems or tanks.
• Most communities have a wastewater treatment
  plant. In rural areas septic tanks are used.
• Septic Tank an underground tank containing
  bacteria that treats wastewater.

9
A Septic System