Unstabilized Activated Sludge from United States
Unstabilized activated sludge from activated aeration basins in municipal sewage treatment, containing microorganisms and unsettled solids. Tariff item 3825.20.00 applies as unstabilized sludge from urban effluent plants, as specified in Chapter Note 5.
Duty Rate — United States → Canada
6.5%
Import Tips
• Ensure the sludge is not stabilized, as stabilized forms may fall under fertilizer headings
• Confirm it comes from an urban effluent treatment plant
• Provide details on the aeration process to support classification under this item