The NSW winners of the Water Industry Operators Association of Australia’s best-tasting tap water have been revealed.

WIOA Chief Operations Officer and water judge Craig Mathisen told Deborah Knight Richmond Valley’s Casino water treatment plan has taken the state’s top prize, moving on to compete for the national title.

Surprisingly, Sydney Water’s desalination plant also got commendations as a runner-up.

“We’ve has desal plants make grand finals in Queensland and also Victoria previously.”

Mr Mathisen also revealed the criteria for awarding the best-tasting water, and explained the judging process.

The official judging criteria.

Did you know water judges sniff coffee beans between each sip?

“If it’s good enough for the perfume industry, it obviously works!”

Press PLAY below to hear how Australia’s best tap water is judged

Image: Getty