East Rand Water Care Company

A truly indigenous South African wastewater company providing bulk wastewater conveyance and a highly technical and proficient wastewater treatment service to some 2 000 industries and more than 3,5 million people.

Provision and maintenance of process control systems

Advanced chemical and bacteriological laboratory services

Research and development in water-related areas

Industry-specific training in both the scientific and operating fields

Physical Address: cnr Kalk / Van Dyk Roads, Rondebult

Rondebult is situated in Germiston and falls within the DD6 drainage district. It was built in 1937 and currently has a capacity of 36 megalitres per day. The works receives raw sewage from Germiston and Boksburg. Rondebult consists of two modules, implementing both biological filters and an activated sludge process to treat a combination of domestic and industrial sewage. The carbonaceous loading from the industries is particularly high and an activated sludge process was retrofitted to relieve the carbonaceous load on the biological filters treatment.

A central inlet works, incorporating screening and grit removal serves the plant. The biological filtration process includes primary sedimentation, primary biological filtration for carbonaceous removal, and secondary biological filtration for nitrification and humus clarification. The biological filters are all covered and fitted with blowers to provide for forced aeration. The combined effluent from the activated sludge reactor and biological filtration process is treated chemically to remove ortho-phosphorous and chlorinated before it flows through a series of maturation ponds.

Over the years a dense stand of reeds developed in these ponds, which attracted numerous numbers of species of waterfowl. This led to the establishment of the internationally known Rondebult Bird Sanctuary. Effluent from these ponds is discharged to a tributary of the Natalspruit, which eventually flows into the Klip River. Solid waste produced in the various processes on the works is stabilised in anaerobic digesters, from where it is disposed of on 70ha of land. The land is used to cultivate fodder.

Capacity : 36.00 Mℓ/d

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ERWAT will be participating in the biennial WISA conference and exhibition from 24 to 27 June 2018 at the CTICC in Cape Town. Besides some of ERWAT’s employees presenting interesting papers, the company will also showcase its products and services at stand number D10-11.

ERWAT will also be taking part in panel discussions and sharing insights into the challenges and opportunities facing the water sector in South Africa and beyond our borders.


ERWAT AT AUW 15-17 MAY 2018

ERWAT will once again be exhibiting at the African Utility Week (AUW) from 15 to 17 May 2018 at the ICC in Cape Town. Visit us at stand number M13c to learn more about what ERWAT can offer.

ERWAT welcomes new Managing Director

Mr Tumelo Gopane recently joined ERWAT as Managing Director.

“I am honored to have been appointed as ERWAT’s Managing Director. It is a privilege to be part of an organization that delivers high quality services and innovative solutions to its clients and that continuously pursues excellence in the water sector”, says Gopane.

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Important information for suppliers and vendors


National Treasury has introduced the CSD (Central Supplier Database). In line with National Treasury directives ERWAT is no longer accepting vendor applications as from 1 July 2016. All vendors must now register on the National Treasury Central Supplier Database. For more information please visit our "Procurement" page.


Welgedacht WWTW extended with 50 megalitres per day


Excitement filled the air on Monday, 9 May 2016 when the Executive Manager: Operations, Mr Fortune Mabunda, switched on the pumps to start pumping the first wastewater through the new 50 megalitre per day (Mℓ/day) extension at ERWAT’s Welgedacht Wastewater Treatment Works (WWTW).

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Telephone: +27 11 929 7000

Facsimile: +27 11 929 7031


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