The Government is pouring millions of dollars into fencing and riparian planting along the Kaipara Estuary to protect it from pollution, including from livestock faeces.
Prime Minister Jacinda Ardern and Environment Minister David Parker made the announcement today during a visit to a Northland farm near the Kaipara Harbour.
It is New Zealand's largest estuarine ecosystem, a 640,000ha catchment with many inflowing rivers that cover the Auckland and Northland regions.
But its rare ecosystems, which are a juvenile habitat for white sharks and snapper, and a natural habitat for orca and many birds, including the critically endangered Fairy Tern, are increasingly clogged with sediment and mangroves.
"Every New Zealander should be able to swim in their river without getting sick," Ardern said.