This project focuses on wastewater treatment using garlic powder, as natural coagulant for coagulation and aeration by PVC rings and coconut shell as two different mediums. This sample collected from a leather tannery which consists of high chemical effluent. Important parameters like pH, chloride, dissolved oxygen; mixed liquid volatile suspended solids, hardness, and turbidity are tested before carrying out the treatment. The wastewater which is treated is checked for the changes in parameters and compared with Central Pollution Control Board (CPCB). Water being the elixir of all life source, is a vital natural resource that covers 70% of the Earth’s area. Water pollution has an impact on marine ecosystems, human and wildlife health. Sewage, fertilizer, and agricultural run-off all includes organic elements that when discharged into bodies of water, promotes algae development, oxygen deprivation. Because of the low oxygen levels, most indigenous creatures in the area are unable to thrive, disrupting the normal biological balance in rivers and lakes