Which industries are the main culprits of water pollution?

Which industries are the main culprits of water pollution?

Answer:
The main culprits are paper pulp, chemical, textile and dyeing, petroleum refineries, tanneries and electroplating industries that discharges dyes, detergent, acids, salts and heavy metals like lead and mercury pesticides, fertilisers, synthetic chemicals with carbon, plastics and rubber, etc., into the water bodies.