The opposition says State Government has admitted Hunter water’s wastewater treatment plants have been sending millions of litres of partially treated water into the ocean off Hunter beaches.

Figures show 13 wastewater treatment plants across the region have been partially bypassing wastewater 141 times each year, since 2011.

NSW Shadow Minister for Water Walt Secord says residents have the right to know when partially bypassed waste water is being pumped into the ocean.