Identify the Undesirable Effects of Water Pollution by Raw Sewage

Water pollution is a grave concern, and one of its most insidious forms is raw sewage contamination. While it may not be as visually striking as industrial waste, the impact it has on our ecosystems is profound. This was a biology Question from Examinations Council of Zambia(ECZ) – ECZ Paper Question 10 Biology 2020, GCE

When raw sewage enters water bodies, it acts as a fertilizer for algae. This leads to an excessive growth of algae, known as an algal bloom. As these algae die and decompose, the process consumes a significant amount of oxygen, leaving aquatic organisms struggling for survival.

Harmful Pathogens

Raw sewage contains a cocktail of harmful pathogens, including bacteria, viruses, and parasites. When it contaminates water sources, it puts human health at risk. Diseases like cholera, dysentery, and hepatitis are common outcomes of such pollution.

Disruption of the balance in Ecosystems

Water bodies are intricate ecosystems, with each organism playing a crucial role. Raw sewage pollution disrupts this delicate balance. It can lead to the decline of certain species, the proliferation of others, and even alter the overall biodiversity of an area.

Raw Sewage May Result in Loss of Revenues

The consequences of raw sewage pollution extend beyond the environment. It can severely impact industries like fishing and tourism, which rely on clean water bodies. The costs of treating contaminated water and the loss of revenue from affected sectors are significant burdens on economies.

Raw sewage pollution is a pressing issue that demands immediate attention. By implementing better sewage treatment systems, promoting awareness, and enforcing stricter regulations, we can mitigate its adverse effects. The time to act is now, for the sake of our environment, our health, and our future.