Can You Compost Sawdust?

This will depend on where the sawdust came from. If the sawdust comes from natural wood then it can be used as compost material. Sawdust would be considered a brown compost matter (source of carbon). You will want to make sure the sawdust is balanced out with green compost matter.

The one instance you may not want to use sawdust is if it is coming from treated wood. Chemically-treated wood products may contain chemicals that aren’t good for the environment.

Reference: https://extension.illinois.edu/compost/common.cfm

Sawdust Compost