Impurities of Water – Organic and Inorganic Impurities

Water obtained from natural sources such as rivers, lakes, wells, and reservoirs is rarely pure. It usually contains various unwanted substances known as impurities. These impurities may affect the taste, color, smell, and safety of water. For domestic use and drinking purposes, water must be free from harmful impurities.

Impurities present in water are generally classified into two main categories: organic impurities and inorganic impurities. Understanding these impurities is important for plumbers, engineers, and technicians involved in water supply systems because impurities can affect water quality and plumbing installations.

What Are Water Impurities?

Water impurities are unwanted substances present in water that may make it unsuitable for drinking or household use. These impurities may come from natural sources such as soil, rocks, and decaying plants, or from human activities such as industrial waste, sewage, and agricultural runoff.

Impurities may be dissolved in water, suspended in water, or present in the form of microorganisms. Some impurities are harmless, while others may cause serious health problems if consumed without treatment.

Classification of Water Impurities

Water impurities are generally classified into the following two main types:

• Organic impurities
• Inorganic impurities

Each type of impurity has different characteristics and sources.

Organic Impurities

Organic impurities are substances that originate from living organisms or biological matter. These impurities are mainly derived from plants, animals, and microorganisms. Organic impurities may enter water through sewage discharge, agricultural waste, or decaying organic matter.

Organic impurities can affect the taste, smell, and safety of water. Some organic impurities may also promote the growth of harmful bacteria and microorganisms.

Examples of Organic Impurities

• Leaves and plant debris
• Animal waste
• Sewage and domestic waste
• Algae and microorganisms
• Decaying organic matter

These substances often enter water bodies through runoff from land surfaces or improper disposal of waste materials.

Effects of Organic Impurities

• Unpleasant taste and odor in water
• Growth of harmful bacteria
• Spread of waterborne diseases
• Reduction in water quality

Water containing organic impurities usually requires proper treatment such as filtration, chlorination, and biological purification before it becomes safe for drinking.

Inorganic Impurities

Inorganic impurities are substances that originate from non-living sources such as minerals, metals, and salts. These impurities enter water when it flows through rocks and soil containing different minerals. Industrial activities and chemical waste may also contribute to inorganic impurities in water.

Inorganic impurities may change the chemical composition of water and sometimes cause water hardness or corrosion in pipes.

Examples of Inorganic Impurities

• Calcium salts
• Magnesium salts
• Iron and manganese compounds
• Sodium and potassium salts
• Chlorides and sulphates

These substances are usually dissolved in water and cannot be removed easily without proper treatment processes.

Effects of Inorganic Impurities

• Cause hardness in water
• Produce scale deposits inside pipes
• Change the taste of water
• Cause corrosion in plumbing systems

High levels of certain inorganic substances may also affect human health and damage plumbing equipment.

Other Types of Impurities in Water

Apart from organic and inorganic impurities, water may also contain other contaminants such as suspended particles and microorganisms.

Suspended Impurities

Suspended impurities include sand, clay, dust, and other solid particles that remain floating in water. These particles make water appear cloudy or turbid.

Biological Impurities

Biological impurities include bacteria, viruses, and parasites present in contaminated water. These microorganisms can cause diseases such as cholera, typhoid, and dysentery.

Methods of Removing Water Impurities

To make water safe for drinking and domestic use, various treatment methods are used to remove impurities.

• Sedimentation: Allows suspended particles to settle at the bottom.
• Filtration: Removes solid particles from water.
• Chlorination: Kills harmful microorganisms.
• Boiling: Eliminates bacteria and pathogens.
• Chemical Treatment: Removes dissolved inorganic substances.

Modern water treatment plants combine several of these methods to provide clean and safe drinking water.

Importance of Water Purification

Purification of water is essential to protect public health and maintain safe water supply systems. Clean water helps prevent diseases and improves the quality of life in communities. For plumbers and water supply technicians, understanding water impurities helps in maintaining plumbing systems and ensuring safe water distribution.

Proper filtration and treatment methods also help prevent pipe corrosion, scaling, and blockages caused by impurities.

Conclusion

Water from natural sources often contains impurities that affect its quality and safety. These impurities are mainly classified into organic impurities and inorganic impurities. Organic impurities originate from biological sources such as plants, animals, and sewage, while inorganic impurities consist of minerals and salts dissolved in water.

Understanding the types and effects of water impurities is important for maintaining safe water supply systems. Proper treatment and purification methods help remove impurities and provide clean water suitable for drinking and household use.