The diagram shows eight stages in the water-treatment process, beginning with raw water and ending with the distribution of clean drinking water.
Initially, untreated water from natural sources is pumped into the system. It then passes through a screening stage, where large debris such as leaves and stones are removed. After this, the water flows into a sedimentation tank, allowing heavier particles to settle at the bottom.
The partially treated water then undergoes filtration, where smaller impurities are removed through sand or carbon filters. Following this, it enters the disinfection stage, in which chemicals are added to eliminate harmful microorganisms.
Once disinfected, the water is stored in a tank until it is needed. In the final step, the purified water is distributed to households and other consumers.
Overall, the process uses mechanical and chemical methods to ensure that raw water becomes safe for public use.