A Sewage Treatment Plant (STP) is a vital system designed to treat wastewater from domestic, commercial, and industrial sources. It removes contaminants, solids, and harmful microorganisms through a multi-stage process including primary, secondary, and tertiary treatment. STPs help protect the environment by ensuring the treated water is safe for disposal or reuse in landscaping, flushing, or industrial cooling. Modern STPs are compact, energy-efficient, and can be fully automated for ease of operation. They also support sludge management and odor control. Ideal for residential societies, industries, and institutions, STPs promote sustainable water use and meet regulatory discharge standards effectively.