PRESSURE will be put on Southern Water to build an emergency sewer to stop sewage discharges into Langstone Harbour.
All members of Portsmouth City Council agreed action needs to be taken to prevent the sea being polluted.
The government and the Environment Agency board will be urged to continue being ‘robust’ in their issuing of fines to the water firm.
And the company will be encouraged to create an advertising campaign letting customers know what is appropriate to flush away.
Ukip councillor Stuart Potter said: ‘Portsmouth is promoted as a great waterfront city and we have got all kinds of activities with the Ben Ainslie building coming up and we will have the America’s Cup parade coming along.
‘I dread to think what will parade along in the sea as well.’
But Paul Kent, Southern Water’s wastewater strategy manager, warned it needed a ‘release system’ to prevent people’s homes being swamped with sewage. He also highlighted how more than £20m upgrading the sewage network.