12 deaths, 1259 new COVID cases and a vaccine milestone for NSW

All the deaths occurred in Sydney hospitals.

Hospitals across the state have 1,241 COVID-19 cases with 234 people in intensive care, 108 needing ventilators.

The breakdown of the 1,259 locally acquired cases is:

The sewage surveillance program has recently detected fragments of the virus that causes COVID-19 at the Bermagui sewage treatment plant ion the NSW South Coast, Glen Innes, Wauchope and Trangie.

"In terms of sewage surveillance, we've found it reliable in giving us early warnings ... we have identified a person with who spent time while infectious in Wagga Wagga, Young and Mudgee," Dr Chant said.

Premier Gladys Berejiklian said NSW would hit 80 per cent single dose vaccinations today.

There have been 198 COVID-19 related deaths in NSW since 16 June 2021, and 254 in total since the start of the pandemic.

"An incredible milestone given the journey we've all been on and I can't thank the community enough for responding in such a positive way for our calls to get vaccinated," the Premier said.

She added if vaccination trends continue, the first dose rate will be enough to prevent the hospital system from being "overwhelmed".

Forty seven and a half per cent of the adult population is completely vaccinated.