ERWAT has systems developed to enable us to continuously improve and to track progress towards the organisational strategy of achieving Green Drop certification for all our WWTW’s. Through the Green Drop improvement plan, quarterly Green Drop assessments are conducted to assist in identifying shortcomings and gaps which allow us to pursue the philosophy of continuous improvement.



Effluent water quality compliance with legislative standards

As per the National Water Act, 1998 (Act No.36 OF 1998), the wastewater treatment works must operate under the Water Use license, an authorisation with conditions and limitations to protect the public and the environment. The legislative standards weigh more to the overall Green Drop requirements.




Telephone: +27 11 929 7000

Facsimile: +27 11 929 7031


General email:

Laboratory email:

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