What happens to humans if we use polluted river water?

In one line

The rule

Water pollution is the contamination of water bodies, such as rivers, lakes, and oceans, due to harmful substances. This pollution can harm aquatic life and make water unsafe for human use.

(Source: NCERT, Class 5–7)

Let's understand it simply

Imagine you are thirsty on a hot day. You see a river and drink its water. If the river is clean, you feel fine. But if the river has dirty things like chemicals, waste, or germs, you can fall sick. Polluted water looks or smells bad, but sometimes it looks clean and is still unsafe. Just like you would not eat food from a dirty plate, you should not use dirty water.

How it works

1. Factories, farms, or drains put waste and chemicals into the river.
2. These harmful substances mix with the water.
3. People use this water for drinking, cooking, or bathing.
4. Germs (like bacteria and viruses) or chemicals enter the body.
5. These cause diseases or other health problems.

The story behind it

People have always used river water for drinking, washing, and farming. But as towns and factories grew, more waste started going into rivers. Scientists and doctors noticed that people living near polluted rivers were falling sick more often. This led to rules about cleaning water before using it.

Where you see it in real life

• Villages using river water → If the river is polluted, villagers get stomach pain or fever after drinking it.
• Cities with water treatment plants → Clean water is supplied, but if pipes break and polluted river water mixes in, people get sick.
• Bathing in polluted rivers during festivals → Some people get skin rashes or infections.
• Cooking with polluted water → Food can taste odd and cause stomach problems.
• Washing clothes or utensils in dirty river water → Germs can stay on clothes or plates, making people ill.

Why it matters

• Diseases like diarrhoea, cholera, typhoid, and dysentery spread through polluted water.
• Children and old people can get very sick or even die from these diseases.
• Polluted water can also have harmful chemicals (like pesticides or heavy metals) that damage organs over time.
• Clean water is needed for good health, cooking, and hygiene.

Common mistakes

• Thinking clear water is always safe. Some germs and chemicals cannot be seen.
• Boiling water kills germs, but it does not remove chemicals.
• Using river water for washing or bathing is also risky if it is polluted.

Remember it

If water looks, smells, or tastes odd, do not use it. Polluted water can make you sick even if it looks clean.