sludge
Defined in 1 dictionary — U.S. Code
United States Code
42 U.S.C. § 6903 — under this chapter (3 versions over time)
The term "sludge" means any solid, semisolid or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution control facility or any other such waste having similar characteristics and effects.
49 U.S.C. § 10908 — in this section (2 versions over time)
The term “sludge” means any solid, semi-solid or liquid waste generated from a municipal, commercial, or industrial wastewater treatment plant, water supply treatment plant, or air pollution control facility exclusive of the treated effluent from a wastewater treatment plant.