DRINKING WATER STANDARDS & AIR POLLUTION BASICS

PRERNA FOR IAS

DRINKING WATER STANDARDS & AIR POLLUTION BASICS

1. Drinking Water Standards

Drinking water standards are guidelines established to ensure water is safe for human consumption. These standards evaluate physical, chemical, and biological parameters of water quality. Physical parameters include color, taste, odor, and turbidity. Chemical parameters assess substances such as calcium, sodium, lead, mercury, and cyanide. Biological parameters focus on microorganisms like E. coli and other disease-causing bacteria. Organizations such as the World Health Organization provide international guidelines that many countries adopt. Regular testing and monitoring ensure compliance with these standards. Safe drinking water prevents disease, protects public health, and supports sustainable development and human well-being.

2. Physical Parameters of Drinking Water

Physical parameters describe the visible and sensory characteristics of water. Important parameters include color, turbidity, taste, odor, and clarity. Turbidity measures the cloudiness of water caused by suspended particles such as soil, microorganisms, and organic matter. Excessive turbidity can reduce water quality and indicate contamination. Color may result from dissolved minerals, organic substances, or pollutants. Drinking water should be clear, colorless, and free from objectionable odors and tastes. These parameters are important because they affect consumer acceptance and may indicate treatment problems. Regular monitoring helps maintain water quality and ensure safe drinking water supplies.

3. Chemical Parameters of Drinking Water

Chemical parameters measure the concentration of dissolved substances in water. Essential minerals such as calcium and sodium occur naturally and may contribute to water quality. However, toxic substances such as lead, mercury, arsenic, and cyanide pose serious health risks even at low concentrations. Chemical testing helps determine whether water is suitable for consumption. Excessive concentrations of toxic chemicals can damage organs, affect neurological development, and cause chronic illnesses. Water treatment processes are designed to remove harmful contaminants and maintain safe levels of beneficial minerals. Monitoring chemical parameters is essential for protecting public health and ensuring water safety.

4. Bacterial Parameters of Drinking Water