1. Section 2.2
Society depends on clean and safe water.
By: Cole and Levi

2. VOCAB Concentration Sewage System Septic System Point-Source Pollution
Nonpoint- Source pollution

3. Concentration- The amount of a substance that is contained in another substance at a given temperature. An example is sugar dissolved in water often expressed as parts per million or billion.
                                                                                          
These glasses containing red dye demonstrate qualitative changes in concentration. The solutions on the left are more dilute, compared to the more concentrated solutions on the right.

4. Sewage System- A system that collects and treats wastewater form a city or town.
Septic System- A small sewage system often for one home or business that uses and underground tank to treat wastewater.

5. Point-Source Pollution- Pollution that enters water from a known source.
Nonpoint-Source Pollution-Pollution with a source that is hard to find or scattered.