The origin and development of our nation’s urban water systems began at the close of the eighteenth century. At that time, following the Revolutionary War, America was largely rural. In 1790, less than four percent of the nation’s population lived in cities. But the country was on the cusp of change. By the early nineteenth century, the United States was transformed into a “network of commerce,” largely due to improvements in transportation, like canals and railroads, and inventions like the telegraph. These advancements sparked massive industrial development and significant population increases in urban centers nationwide.