At this week's general meeting, Griffith City Council voted to put all the remaining water from this year's water allocation into Lake Wyangan.

The decision means about 2700 megalitres of water will be added to the lake.

The lake currently contains about 4100 megalitres, so the additional water is expected to almost completely fill it.

Lake Wyangan and catchment management project officer Tom Mackerras said the water level will be the highest it has been since 2016.

He said adding the water will help dilute salinity levels in the lake and is a small step in the larger plan to restoring the lake's water quality.

The process of adding the water is expected to begin as soon as possible and it will take six to eight weeks for the whole 2700 megalitres to be poured in.

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Speaking to The Area News last year, Mr Mackerras said there was a long term plan for restoring the lake.

The plan included developing hydrodynamic circulation model to interpret the impact of water discharge on water quality, monitoring the volume and sediment and nutrient concentration of storm water run off, and developing a plan with Murrumbidgee Irrigation to maintain water levels suitable for recreational purposes.

Swimming and recreational activities on the lake are still prohibited with the water quality still at red alert level.

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