Water pollution is the contamination of water bodies like lakes, rivers, oceans, and
groundwater caused by human activities, which can be harmful to organisms and plants that live
in these types of water bodies. There are several ways to pollute water, whether it is people
dumping their garbage in the water or on the sand near bodies of water or whether it is from oil
spillage. Improper disposal practices have a direct effect
on public health.
Water resources have become inadequate in the city, partly because of the increase in
water demand and poor environmental management as well as
inappropriate sanitation practices.
In the last few years the areas around dump sites have become very populated: the dumps are
also located close to important water bodies. Water pollutants are categorized as: sewage,
disease-causing agents, sediment pollution, inorganic plant and algal nutrients, organic
compounds, inorganic chemicals, radioactive substances, and thermal pollution. Sewage is one
type of pollution that comes from wastewater drains or sewers. Examples of sewage are human
wastes, soaps, and
Some effects of sewage are that it threatens public health; causes
enrichment and high biochemical oxygen demand (BOD).
Disease causing agents is another type of pollution that comes from wastes of infected
individuals. Some examples of disease causing agents are bacteria, viruses, protozoa, and
parasitic worms. Some effects of disease causing agents include the spread of infectious diseases
(cholera, dysentery, typhoid, infectious hepatitis, and poliomyelitis). Another type of pollution is
thermal pollution. Thermal pollution is caused by industrial runoff. Heated water produced
during industrial processes, then released into waterways is an example of thermal pollution. One
of the major effects of thermal pollution is that it depletes the water of oxygen and reduces the
amount of oxygen that the water can hold; reduced oxygen threatens fish.