Croydon resident Lydia Cousins wants Maroondah Council to support conservation groups' concerns about the impact logging is having on water in catchment areas such as Armstrong Creek.

Last year, the Melbourne Water Catchment Network, with the support of other conservation groups, began lobbying councils on this issue.

They believe that the clearfell logging of native forest in Melbourne's water supply catchments is reducing the water supply for 3.6 million residents.

In the past four months, seven councils, including Yarra Ranges, Knox and Whitehorse, have taken a stand against continued logging in the catchments.

Maroondah is yet to act.

Ms Cousins said logging in catchment areas would affect Maroondah residents both now and in the future.

"The forest is the most important natural water store. Logging in the catchment areas such as Armstrong Creek and Thompson Dam seriously affects the quality of our water."

Cr Alex Makin said logging was a major issue and there was sufficient evidence to back up residents' concerns.

"[Logging] erodes the ability of our water catchment to retain water. There should be a far more cost effective and environmentally effective solution.

"It is my intent to secure a motion whereby Maroondah would support a letter calling on the State Government to stop logging our catchment areas."

Mayor Tony Dib said councillors agreed that a report on the issue would be considered at the May council meeting.

"As mayor I am in full support of stopping logging all around the state. It not only affects the water supply of Maroondah residents, but those across Victoria."

Cr Dib said he expected all councillors to agree.