Drinking-Water Treatment

Clean, safe water is vital for everyday life. Water is essential for the health, hygiene, and productivity of our community. The water then goes through a rigorous set of processes at our water treatment works before being pumped into the network to your home or business. The treatment process varies according to the type and quality of the source of water.

The water treatment process may vary slightly at different locations, depending on the technology of the plant and the water it needs to process, but the basic principles are largely the same. This section describes standard water treatment processes.

Groundwater Treatment Works :

These works abstract water from below-ground sources such as aquifers and springs. Groundwater tends to be relatively clean in comparison to surface water, and fewer treatment steps are required.

Surface Water Treatment Works :

These works take their water from above-ground sources such as rivers and reservoirs. Raw water from these sources is open to direct environmental input, and multiple treatment steps are required to clean the water. Individual process steps are used in varying combinations to clean and disinfect the abstracted water.

The Treatment Process :

1. Abstraction of Raw Water
2. Storage Reservoir
3. Screening
4. Clarification
5. Filtration
6. Aeration
7. Granular Activated Carbon (GAC)
8. Ozone dosing
9. Disinfection
10. Ammoniation