Water Pollution
Water pollution is the contamination of rivers, lakes and seas by chemicals, sewage, plastics and oil.
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Water pollution is the contamination of rivers, lakes and seas by chemicals, sewage, plastics and oil.
- Fertiliser causes algal blooms
- Plastic harms marine life
- Treatment plants clean water
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Water Pollution?
Within Earth & Environmental Science, which covers our planet, its resources and ecosystems, and how people can protect the environment, this topic explains Water Pollution. Earth and environment topics show how the planet’s systems shape landscapes, climate and life, with models that make these processes visible.
Check that you can explain Water Pollution in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Water Pollution helps you explain the environment around you and weigh up how people can protect it.
Water Pollution in detail
Water pollution is the contamination of water bodies by harmful substances. Sources include sewage, industrial waste, agricultural runoff (fertilisers, pesticides and animal waste), oil spills, plastics, mining and litter. Point sources, such as a factory pipe, are easier to control than diffuse sources, such as field runoff.
Effects include harm to aquatic life, eutrophication (nutrient enrichment causes algal blooms that deplete oxygen), disease from contaminated drinking water, and bioaccumulation of toxins in food chains. Solutions include sewage treatment, regulations, reducing chemical use, cleaning up spills and buffer strips. Clean water is essential for health.
How the interactive helps you understand Water Pollution
Watch the cycle in the interactive. Use any sliders or buttons it offers to change the values and see how the cycle responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Water Pollution.
Real-life uses and examples
- Explain how Water Pollution affects the landscape or climate near you.
- Link Water Pollution to a real environmental problem and a possible solution.
- Use a diagram of Water Pollution to describe the steps of a process in order.
Common mistakes to avoid
- Describing a process without the timescale it works over.
- Presenting one cause as the only cause of an environmental change.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Water Pollution
What is Water Pollution?
Water pollution is the contamination of rivers, lakes and seas by chemicals, sewage, plastics and oil.
What are the most important points about Water Pollution?
The main points are: Fertiliser causes algal blooms; Plastic harms marine life; Treatment plants clean water.
Why is Water Pollution useful?
Understanding Water Pollution helps you explain the environment around you and weigh up how people can protect it.
How can I practise Water Pollution?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Water Pollution?
Related topics in Earth & Environmental Science include Food Webs and Energy Flow, Endangered Species and Conservation, Deserts and Grasslands.