Can I Use Sawdust From Treated Wood?

Hazards of Treated Wood

Sawdust from pressure-treated wood can contain chemicals like arsenic, chromium, and copper, which are toxic and can leach into the environment. These chemicals can also contaminate the composting process and potentially harm humans and wildlife if ingested. In a humanure sawdust toilet, these chemicals can accumulate and persist, posing a long-term risk to health and the environment.

Testing for Contamination

Before using sawdust from treated wood, it’s essential to test for chemical contamination. A simple and effective method is to use a pH test kit to check the acidity level of the sawdust. Treated wood typically has a higher pH level compared to untreated wood. By testing the pH, you can determine if the sawdust is safe to use.

Alternatives to Treated Wood

To avoid potential contamination, opt for sawdust from untreated wood sources, such as cedar, pine, or fir. These types of wood are naturally resistant to rot and insects, reducing the need for chemical treatments. Always source sawdust from reputable suppliers or harvest from local, untreated wood sources.