Question

find out how the sewage in your locality is treated, are their any mechanism in place to to ensure that the water bodies are not polluted by untreated sewage

Answer 1

Answer:

Sewage can be treated close to where the sewage is created, which may be called a "decentralized" system or even an "on-site" system (in septic tanks, biofilters or aerobic treatment systems). Alternatively, sewage can be collected and transported by a network of pipes and pump stations to a municipal treatment plant.