Does the Concentration of Chlorine in Drinking Water Tend to Increase

Multiple Choice

Does the concentration of chlorine in drinking water tend to increase or decrease as it leaves the water treatment plant and disperses into the community? Why?

A) Increases.As the chlorine reacts with the bacteria in the water,more chlorine is produced.
B) Increases.As the water evaporates the chlorine concentration would increase in the remaining water.
C) Decreases.Evaporative processes and reaction with organic bacteria would decrease the chlorine concentration.
D) Neither.The chlorine concentration in the water does not vary as the water is dispersed into the community.