Internal Assessment of Practical Work – Notes
Sources of water pollution can be divide into two types – point sources and non – point sources.
Point sources are the easily identifiable sources of pollution, such as municipal and industrial discharge pipes.
Non – point sources are not easily identifiable such as agricultural off from farms, acid rain and storm water drainage from streets and parking lots, etc.
Pathogens are the most micro – organisms that cause diseases and are the most harmful of the causes of water pollution.
Organic wastes are the biodegradable wastes caused by organic matter such as leaves and grass.
Chemical pollutants include heavy metals, fertilisers, and pesticides and radioactive substances.