Industrial waste includes waste produced by factories, mills, and mines that can be hazardous or non-hazardous. It is categorized as liquid waste, sludge, solid waste, or hazardous waste. In Malaysia, industrial waste has evolved over time with the country's major industries - starting with chemical, textile, and metal working in the 1970s, expanding to include food/beverages, furniture, and plastics in the 1980s, and now focusing on electronics, engineering, and telecommunications. The amount of industrial waste generated is directly related to the level of industrial production.

1. Industrial waste
Current issue and statistics

2.  Industrial waste includes:
 Waste produced by industrial activity, such as that of
factories, mills and mines.
 Industrial waste may be not hazardous or toxic, such
as waste fiber produced by agriculture and logging
and may be hazardous.
 Precisely, Industrial waste is the unwanted materials
produced in or eliminated from an industrial operation
and categorized under a variety of headings, such as
liquid wastes, sludge, solid wastes and hazardous
wastes.

3. Industrial sector in Malaysia
Year Industries
1970 the chemical, textile, and metal
working industries
1980 food and beverages, furniture,
textiles, plastic and petroleum
based products
1990 until now electrical and electronics,
engineering, information,
communication and
telecommunication.

7. Relationship between industrial waste
generation and industrial production.