A total swimming and shellfish ban is in place for the Nelson Haven following a sewage leak.
A failure of the Atawhai Rising Main at Marybank on Wednesday afternoon resulted in an overflow of untreated sewage. Repair work was completed early on Thursday.
An estimated 1600 cubic metres spilled from the pipeline during the repair. Warning signs are in place.
The ban is expected to remain in force for at least several tidal flushes until the discharge is completely cleared.