4.4 Water Usage

2026 📋 Syllabus Objectives

By the end of these notes, you should be able to:

  1. Describe the different ways in which fresh water can be used
  2. Give examples across three main categories: domestic, industrial, and agricultural uses

Main Content

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What Is Fresh Water?

Fresh water is water that contains very low amounts of dissolved salt. It is the type of water found in rivers, lakes, and underground stores (called aquifers — natural underground layers of rock that hold water). Fresh water is essential for human survival and for running economies around the world.

Unlike salt water from the ocean, fresh water can be drunk, used to grow crops, and used safely in most industrial processes. Because of this, it is an incredibly valuable and limited resource.

The Three Main Categories of Fresh Water Use

Fresh water is used in three broad ways: domestic, industrial, and agricultural. Each category covers a wide range of activities. Let's look at each one in detail.

1. 🏠 Domestic Use

Domestic use means the way ordinary people use water at home and in everyday life. This is the water that comes out of your tap, fills your bath, and flushes your toilet.

Examples of domestic water use include:

  • Drinking and cooking — The most basic and vital use. We need clean, safe water to stay alive and to prepare food.
  • Washing and bathing — Showers, baths, washing hands, and brushing teeth all require water.
  • Toilet flushing — A large amount of household water is used simply to flush toilets. In many homes, this is actually one of the biggest uses of water indoors.
  • Washing clothes — Washing machines use significant amounts of water per cycle.
  • Washing dishes — Either by hand or in a dishwasher, cleaning dishes requires water.
  • Garden watering — People water lawns, gardens, and houseplants, especially in drier climates or during summer months.
  • Car washing — Rinsing and cleaning vehicles at home uses water directly from the tap or a hose.

💡 Key point: Domestic use is not just about drinking. In fact, the majority of water used in the home is for non-drinking purposes like flushing toilets and washing.

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