Sydney Harbour is in line for a "pollution injection" under a plan to funnel more sewage overflow into its waters during heavy storms, residents are being warned.

Plans are underway for more than a dozen new overflow pipes designed to release stormwater mixed with untreated waste water directly into Sydney Harbour and other NSW waterways during extreme rainfall. The pipes are designed to stop wastewater flowing back into people’s homes at times when the city’s sewage pipes…