Water pollution may be defined as any physical change in the natural water by the addition of any foreign material that adversely affects human and aquatic life, directly or indirectly, in the short run or in the long run.

Water is considered to be POLLUTED when it is contaminated with:

1. Suspended impurities, such as SAND, MUD, clay and organic matter;
2. Dissolved gases like CO2, NH3, N2, H2S;
3. Dissolved minerals like calcium, sodium and magnesium salts;
4. Isotopes or radio-logically active substances; and
5. Microorganisms like bacteria, viruses, protozoa’s and worms.

The pollution of water alters the physical properties of water, such as colour, odour, TURBIDITY and temperature. The presence of dissolved or suspended chemical POLLUTANTS can make the water acidic or saline.

Water pollution may be defined as any physical change in the natural water by the addition of any foreign material that adversely affects human and aquatic life, directly or indirectly, in the short run or in the long run.

Water is considered to be polluted when it is contaminated with:

The pollution of water alters the physical properties of water, such as colour, odour, turbidity and temperature. The presence of dissolved or suspended chemical pollutants can make the water acidic or saline.