Rome 3

how a septic system worksfrom the late 19th century cities had sewer systems to dispose of waste, replacing gutters and private pit disposal
some richer farms had pumped water and septic tanks, but poorer farms had outhouses
flush toilets produce a lot of contaminated water
people wanted flush toilets, not outhouses, before they would move to the suburbs
but it would be expensive to put in sewer systems

Septic tanks in subdivisions:
The problem was initially a health problem in developments, but became a broader problem
detergent pollution