It is the sixth day in a row no Shoalhaven residents were diagnosed with the virus overnight, however, one case was reported in Wollongong.

The case is from the 2500 postcode and acquired the virus overseas.

There are 2644 total cases confirmed in the Illawarra Shoalhaven LHD, of these,128 cases were acquired overseas.

The numbers come as NSW Health has detected fragments of the virus that causes COVID-19 in sewage samples collected from the Gerringong/Gerroa sewage treatment plant earlier this week.

The plant serves about 7,200 people.

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Meantime, state case numbers are on the rise with NSW adding 262 new cases to the COVID tally and three deaths in the 24 hours to 8pm last night.

This is the third day in a row the state has seen increases in numbers with 212 cases recorded on November 16, and 231 on Wednesday, November 17.

The state's population aged 16 years and over is now 91.4 per cent fully vaccinated, while 94.3 per cent have had their first dose.

In those aged 12-15 years of age, 74.2 per cent are fully vaccinated while 80.7 per cent have had a single dose.

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The local health district has reminded the community vaccination clinics are now offering a booster dose of the Pfizer vaccine to people aged 18 years and older, six months after their second dose.

Booster shots are also available at local general practitioners and pharmacies.

NSW Health are no longer routinely listing case locations for regional and rural NSW on its website.

NSW Health will continue to contact people diagnosed with COVID-19 and their close contacts, and all people who need to follow specific health advice.

Residents are also alerted of exposure sites through the NSW Service app.

For a list of COVID-19 testing sites across the Illawarra Shoalhaven, visit the local health district's website.

Waminda has announced a new COVID testing clinic will open at its Nowra office Mondays and Fridays.

The clinic is available for Aboriginal women, men and children and bookings are not necessary.

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