A Sewage Treatment Plant (STP) functions as a cleaning station for dirty water from residences and industry. It takes a step-by-step approach to making the water safe. First, it removes large items, such as trash. Then, tiny living things break down the dirt. After that, chemicals clean the water even more. The final result is water that's safe to go back into nature without causing harm.
Sewage Treatment Plants help keep our environment clean by making sure the water we use doesn't harm nature when it goes back.