Drinking water
Sourcing, treating and delivering safe, clean water to your home and workplace.
Stormwater
Managing runoff and rainwater to reduce flooding, prevent pollution of waterways and return water back to the environment.
Wastewater
Treating and safely disposing of used water to protect our awa, our environment and the health of our communities.
Working together to safeguard our water.
IAWAI brings Hamilton City and Waikato District Councils together as a single regional water provider.
Working in partnership with Waikato-Tainui and guided by Te Ture Whaimana, we bring people, knowledge and investment together so we can plan our infrastructure needs, spend wisely, and support the needs of our growing communities.
Partnership with:
Recent projects
See the progress we’ve been making with recent projects across Hamilton and the Waikato.
Latest news and project updates
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19 June 2026Key decisions confirmed for new $200 million wastewater treatment project
The preferred location, consenting approach and treatment standards for a new wastewater treatment plant have been confirmed, marking a major step forward for the project.
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18 June 2026
Water meters confirmed to tackle water savings
A multi-year programme to improve water efficiency and drive financial savings through residential water metering was confirmed for Hamilton this morning.
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18 June 2026
New charging structures confirmed as IAWAI adopts first Water Service Strategy
The first structural changes to how long-term water and wastewater costs are managed in Hamilton and Waikato District were locked in this morning (Thursday 18 June 2026).
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16 June 2026
Generational improvements on the table for IAWAI Board
Decisions which will shape the future of its region's water services are on the agenda for the IAWAI Board this Thursday.
- All News
Frequently asked questions
What is IAWAI, and why has it been created?
IAWAI has been created to bring drinking water and wastewater services together under a single regional provider. This allows water services to be planned, funded and delivered more efficiently, while meeting higher standards and supporting growth across the region.
Is this privatisation of water?
No. IAWAI is publicly owned by Hamilton City and Waikato District Councils. Water remains publicly owned, and by law it cannot be run for profit.
When does IAWAI take over water supply services?
IAWAI officially launches in July 2026.
Will my water service change?
No. Your water will continue to flow as it does now. The same teams, infrastructure and standards remain in place.
Do I need to do anything right now?
No action is required, just get to know us! This is a planned transition, not a sudden change.
Who do I contact if there’s a leak or issue?
For now, you’ll continue to contact your council as usual. Over time, customer services will transition to IAWAI; we’ll keep you in the loop about these changes when they happen.