FAQs
Wastewater from homes and businesses in Maketu is treated at the plant using a biological process called a Sequential Batch Reactor (SBR).
The fully treated water is piped to the adjacent paddock (the soakage field).
The water filters down through the soil. Plants in the field absorb nutrients like nitrogen, and the soil further cleans the water.
To keep the system healthy, grass is regularly cut and removed.
Installing new valves so we can isolate and manage different zones within the field
Adding new flow and pressure meters to better monitor how much water is soaking in
Improving how we manage flow, including the ability to pump treated water back to the plant if the soil becomes too saturated
Replacing older or underperforming sections of the field network
No change to your service - your toilet, sink and shower will work as normal.
No odours - the entire system is underground and fully enclosed.
Minimal disruption - you might see a digger or equipment onsite occasionally, but we don’t expect any major increase in traffic or noise.
Work is expected to be finished by the end of 2025.
What is a soakage field and how does it work?
A soakage field is the final step in a land-based wastewater system. It acts like a natural filter, returning clean, treated water to the land in an environmentally friendly way.
Here's how it works:
This method avoids discharging into waterways and helps us protect the neighbouring estuary.
Why is Council doing this work?
The current soakage field was installed over 13 years ago and is showing signs of wear. We’re taking the opportunity to upgrade the system and make it more efficient by:
These improvements will help us make better use of the land, reduce the risk of overloading, and meet modern environmental standards.
What does this mean for the community?
What is the history of the treatment plant?
The Maketu Wastewater Treatment Plant opened in 2012 as part of a $16 million upgrade that replaced a significant number of ageing septic tanks across Maketu and Little Waihi. The new centralised system was a significant step forward for environmental protection and community health, supported by Council, the Bay of Plenty Regional Council and central government.
How will this be funded?
The project is funded through our Long Term Plan (LTP) – Council’s 10-year investment plan for infrastructure and essential services across the District.