Understanding the Drinking Water Treatment Process
and Its Role In Providing Safe Water
A critical step in maintaining the safety and purity of our drinking water is drinking water treatment. Physical, chemical, as well as biological treatments, are utilized in the procedure to clean up pollutants and toxins from raw water sources so that it is suitable for drinking.
Surface water via rivers, and lakes, including reservoirs along with groundwater from wells and aquifers are both potential sources of raw water. Raw water can, though, include a wide range of contaminants, which include those that pose a serious threat to public health, such as bacteria, viruses, parasites, algae, minerals, and both inorganic and organic substances.
Drinking Water Treatment Procedure
The following steps are commonly included in the drinking water treatment procedure:
Coagulation
The process of treating water starts with something that’s termed “continuous coagulation.” During the phase known as “coagulation,” positively charged chemicals may still be able to dissolve in water. The positive charge of the water acts as a counterbalance to the negative charge that is carried by the dirt and other particles that are dissolved in the water.

Flocculation
Flocculation is followed by coagulation. Flocculation is a method that involves progressively mixing water to produce bigger, heavier particles called flocs. At this stage, water treatment facilities often add additional chemicals to help in the development of the flocs.
Sedimentation
Sedimentation is a method used only in water treatment facilities to remove contaminants from the water. Due to its greater density compared to water, floc settled to the bottom of the pond during the sedimentation process.
Filtration
It is possible to filter out any remaining sediment from the clean water at the top of the tank as the flocs sink to the bottom. The purified water goes through a series of filters with successively finer and coarser media. Parasites are a kind of soluble pollution that may be filtered out along with bacteria, viruses, dust, and chemicals. In addition, activated carbon filters might mitigate any lingering scents.
Disinfection
The water may be treated with chemical disinfectants (such as chlorine, chloramine, or chlorine dioxide) at the end of the purification process in order to kill any lingering parasites, bacteria, or viruses. Water is checked for residual disinfectant chemicals before being distributed to residents. This contributes to making the water supply safer for human consumption. The disinfectant used in the water treatment process still remains in the pipes, killing any bacteria or viruses that may have made it through.
Remembering that the specific procedure can change depending on the area, water supply, and treatment facility is crucial.
