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IB ESS SL 4.4.1 Water Pollution Sources Question Bank

Identify point and non-point sources and trace pollutants into water systems.

Syllabus
First assessment 2026
Course
ESS SL
Level
SL

Exam points

  • identify the aquatic-system process or pollution indicator
  • apply the relevant conservation, quality or management model
  • evaluate ecological and human trade-offs from evidence

4.4.1—Water pollution sources question 1

[Maximum number: 2]

A small lake is going through the process of eutrophication. State one possible point source and one possible non-point source of nutrient pollution in the lake.
Point source:
Non-point source:

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