Wastewater engineering services from Warkworth to Northland
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Wastewater design

Environmental engineering

Northland wastewater engineering projects

Our experts will advise on all aspects of wastewater engineering and on-site wastewater treatment and disposal including infrastructure design, hydraulic modelling, pump station design and wastewater treatment plant design.


We combine our technical expertise with a deep understanding of the local landscape to develop efficient and sustainable solutions.


We place emphasis on innovation and embrace the latest technologies and practices in water and wastewater engineering. As you’d expect from a business specialising in civil engineering in NZ, we’re extremely well-versed in the design and operation of water and wastewater systems, including extensions of private and public wastewater lines, ensuring optimal performance and minimal environmental impact.


We understand very well the unique challenges that come with wastewater engineering, treatment, disposal and reuse.

We have extensive experience arising from work on projects of all sizes, from developing compact package plants to expansive local government and industrial ponds, pumping stations, distribution networks and sewerage systems.


Our team of experienced engineering professionals is committed to delivering cost-effective and environmentally-friendly solutions tailored to meet your project’s specific waste and wastewater engineering needs. We can help build new systems, expand existing ones and rehabilitate, in a cost-effective way, old or failing systems. Of course, we’re also happy to trouble-shoot and our experts can guide you on operation and maintenance.


Our in-depth knowledge and understanding of the local design standards, a comprehensive assessment that evaluates the potential impacts of development on water and wastewater infrastructure, enables us to guide clients through the complex regulatory requirements and ensure compliance with the highest industry standards.


We have our roots in the communities of the Far North, Mid North and Bay of Islands, and we’re proud of contributing to their growth.

Wastewater engineering case studies

  • Geotechnical engineering, Land Development, Roading and traffic, Stormwater management, Structural design, Wastewater design
  • Contaminated land, Geotechnical engineering, Infrastructure engineering, Land Development, Local procurement
, Project Management, Roading and traffic, Stormwater management, Structural design, Wastewater design

For water & wastewater engineering, trust us to deliver outstanding results. With offices in Kerikeri, Whangārei and Warkworth we’re well-placed to serve clients anywhere north of Auckland. Contact Haigh Workman today to discuss your civil engineering requirements in the Northland region or beyond.

contact us

It doesn't matter how large or small your project is, we'd love to be involved. Please get in touch.