ERWAT is currently custodian of 19 wastewater care works, treating a combined capacity of some 696 megalitres (million litres) of wastewater per day.

Activated sludge processes, designed for biological nutrient removal or biological filtration processes and combinations thereof are generally employed in the purification of the wastewater. The designed capacity of the individual works, based on the average dry weather flow rate, varies from 0,4 megalitres to as high as 155 megalitres per day.

ERWAT follows a business-orientated approach towards wastewater management. The company offers client needs-based solutions, from operational, technical to management aspects.


Telephone: +27 11 929 7000

Facsimile: +27 11 929 7031


General email:

Laboratory email:

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