What diseases are among the most serious effects of water pollution, especially in developing countries, where sanitation may be inadequate or non-existent?

• A. Non-communicable diseases
• B. Cardiovascular diseases
• C. Waterborne infections
• D. Human infectious diseases

Answer: (D)

Polluted water carries pathogens into the water people rely on for drinking, cooking, and washing. When people are exposed to this contaminated water, they can develop infections caused by bacteria, viruses, or parasites. In developing countries where sanitation is inadequate or non-existent, exposure is widespread, so infectious diseases become a major, often serious health burden. Examples include diarrheal illnesses such as cholera, typhoid, and dysentery, along with other water-related infections like hepatitis A. While non-communicable and cardiovascular diseases are important health concerns, they are not the direct, primary outcomes most closely linked to poor water quality in these settings. The clearest link between water pollution and health in this context is human infectious diseases, driven by transmission of pathogens through contaminated water.