The different ways in which water gets contaminated are:
i) Industrial waste: Harmful chemical wastes get released by the industries into water sources. [1 mark]
ii) Sewage waste: Kitchen, laundry, and toilets release waste materials into the water bodies and this pollutes water. [1 mark]
iii) Agricultural chemicals: Excessive amounts of pesticides and fertilisers are used by farmers for enhancing crop production. Rains and floods carry these harmful chemicals into the water bodies, which results in water pollution. [1 mark]