A union warns that 'waste will pile up' as industrial action is confirmed between 18 and 31 August.
Ms Baxter, Unison's head of local government, called the strike action a "consequence" of Cosla and the Scottish government failing to find a solution.
Unison members in Aberdeenshire, Clackmannanshire, East Renfrewshire, Glasgow, Inverclyde, North Lanarkshire, Stirling and South Lanarkshire have said they will walk out. She said: "Council leaders across Scotland including Edinburgh and Glasgow are publicly on the record acknowledging this reality so why should our members even consider it.
"We urge Cosla to urgently reconsider its position and match the Scottish government's additional £140m that would be required to increase the pay offer to 5%." GMB Scotland Senior Organiser Keir Greenaway said no-one should be surprised his union was rejecting offer.