A sewage spill in Raglan Harbour has prompted a warning against swimming, fishing and gathering shellfish.
Untreated wastewater entered the harbour when the main inlet pipe at the Marine Pde pump station collapsed about 8pm yesterday, the Waikato District Council says.
Council staff and contractors were on site quickly and stayed there through the night to limit further wastewater entering the harbour.
A temporary solution to pump wastewater manually should "do the job" while the repair is worked on, the council says.
About 10,000 litres of untreated wastewater entered the harbour.
"We are advising no swimming, fishing or seafood gathering within the harbour until further notice," the council said today.
The council says it will investigate the cause of the collapse and will involve Waikato Regional Council in that.