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Watercare is upgrading the Warkworth wastewater network with a $12 million project that includes relining 3.5 kilometers of pipes to reduce stormwater inflow and prevent wet-weather overflows into the Mahurangi River. Inspections will begin this month in the area north of Elizabeth St, where a bottleneck exists.

The relining process, using trenchless technology, aims to extend the lifespan of pipes built in the 1960s and 70s. This initiative is part of Watercare's larger $450 million program, which also includes the Warkworth growth-servicing pipeline expected to be fully operational by 2027, addressing capacity and environmental concerns.