Underground water like in a well can't clean itself because of man made pollutants, from large farms that seep through the ground. there is little agitation to keep it areated, and becomes stagnant, which develops bacteria and other pathogens to make us sick..
Answer:
The Gilded Age is the latter half of the 19th century, when an increase in production and wealth drove many more people to live in urban areas than had ever before. The middle class gained more wealth and sought to live like the elite upper class. ... Puritans lived in small settlements and avoided excess wealth.
