Sewage sludge
Residual products of the chemical or allied industries, not elsewhere specified or included; municipal waste; sewage sludge; other wastes specified in Note 6 to this Chapter. > Sewage sludge > Sewage sludge
Duty Rate (from China)
Subheadings
Products classified under Tariff item 3825.20.00
Municipal Sewage Sludge
Municipal sewage sludge generated from urban wastewater treatment plants prior to stabilization. This product contains organic matter, pathogens, and solids from household and industrial effluents, and is classified under tariff item 3825.20.00 as sewage sludge per Chapter Note 5.
Primary Sewage Sludge from Urban Plants
Primary sewage sludge from urban plants, consisting of untreated primary solids settled from municipal wastewater influent. This product is rich in organic and inorganic particulates and falls under tariff item 3825.20.00 as pre-treatment waste from urban effluent treatment plants, as explicitly included in Chapter Note 5.
Scourings from Sewage Treatment
Scourings from sewage treatment, including grit, rags, and debris removed during preliminary treatment of urban wastewater. This product is covered by tariff item 3825.20.00 under Chapter Note 5, which explicitly includes 'scourings' as part of sewage sludge from effluent plants.
Unstabilized Activated Sludge
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.
Urban Effluent Pre-Treatment Sludge
Urban effluent pre-treatment sludge from physio-chemical pre-treatment stages of municipal sewage, including coagulant precipitates. Tariff item 3825.20.00 applies per Chapter Note 5, which explicitly names 'pre-treatment waste' from urban effluent plants as sewage sludge.