How Does Household Wastewater Get Treated in an STP? Household wastewater flows from kitchens bathrooms and laundry areas into sewer lines. It carries oils soaps food particles and human waste. Treating this water before it returns to the environment helps protect public health and conserve water resources. Netsol Water is a leading manufacturer of systems that handle this task. Visit the link for more information: https://www.netsolwater.com/how-does-household-wastewater-get-treated-in-an-stp.php?blog=6917