The latest water test results for both towns are not meeting NSW Health standards for drinking water, according to Upper Hunter Shire Council.

"We understand this is frustrating and inconvenient," a spokesperson said.

"Council staff is doing everything possible to fix the issues.

"The water quality is slowly improving as we flush the system - about 5 megalitres (5 million litres) of 'dirty' water has already been pushed out.

"It will eventually clear the network.

"If your water is very cloudy, take a photo and email council@upperhunter.nsw.gov.au with your address.

"This will allow us to 'map' which areas of the network are a priority for further flushing."

The current water quality problems have been caused by weather events - a long drought reduced the reliability of the water supply, then heavy rain causing turbidity issues in the water we do have.

Council is seeking grant funding for a multi-million dollar water treatment plant that would give it more options to treat water under these sorts of conditions.

Scone and Aberdeen residents are advised to boil water for drinking and food preparation, until further notice.