(1) Hazardous ความอันตราย
Waste that may be harmful to human health or the environment (e.g. solvents, oils, asbestos, fluorescent lights, batteries.)
(2) Non Hazardous (Non Inert)
Waste that is reactive but does not have hazardous properties (e.g. wood, paper and cardboard)
(3) Non Hazardous (Inert)
Waste that is non-reactive and does not have hazardous properties (e.g.uncontaminated glass, bricks and concrete.