Water & wastewaterJohn Holland

Water & wastewater

We provide the infrastructure that supplies safe drinking water and removes wastewater for communities across the nation. We work with Australia’s leading water authorities in some of the most challenging environments – providing innovative design, construction, operation, and maintenance solutions for both large-scale urban and regional projects.

We’ve designed and delivered some of Australia’s most innovative and highly-awarded water infrastructure assets – including seawater desalination plants, the nation’s first thermal sludge hydrolysis facility, and the first acid phase digestion facility.

We plan, design, and deliver pipelines, irrigation, and reticulation channels. We improve water access by automating delivery systems and refurbishing aging water distribution and irrigation channels. We’ve delivered dam upgrades across Australia to improve the safety and storage capacity of reservoirs. Our capabilities include strengthening existing embankments, major structural upgrades of spillways, and installation of gates on spillway crests.

We’re also pioneering new technologies that draw on our integrated engineering expertise.


Water & wastewater projects

A 20-fold increase for the Cotter Dam.

The largest desalination plant in Australia and the second largest in the world.

Securing our most precious resource.

Safe, secure, future-focused water storage.

Giving drought-affected communities a Plan B.


John Holland pays respect to the Traditional Owners and Custodiams of the land on which we work and live, and their connections to land, sea and community. We pay our respect to their Elders past and present and extend that respect to all First Nations peoples today.