Chemistry- Using resources- Potable water and waste water treatment

What is potable water?

How are fresh water sources treated to make it potable?

How do you make sea water potable? What are the problems with these processes?

Name 2 waste water sources that have to be treated due to human interferance:

name one industrial process that causes waste water: How is it treated?

What are the first two steps of sewage treatment?

What are steps 3 ?

What is step 4?

What is step 5