The public are urged not to swim in Pandora Pond in Napier amid a potential contamination.
People are advised not to swim in the pond until 4.30pm on Sunday in case it has been contaminated by an overflow from the Pandora industrial area on Thursday.
Napier City Council staff carrying out a routine check on the Mersey St wastewater pump station discovered the potential contamination.
According to a spokeswoman, staff worked to successfully remove the blockage in the wastewater pipe underneath Mersey St and removed 40,000 litres of potentially contaminated water, which will be transported to the wastewater treatment plant.