Water pollution affects plants and organisms living in these bodies of water; and, in almost all cases the effect is damaging either to individual species and populations, but also to the natural biological communities.

1. Presentation on water pollution By :- Ashwin Betharia Vrushali Tijare Aparna Khapre Guided By Ashish Ghorpade(pdimtr) tqma2z.blogspot.com

2. Pollution Pollution is the introduction of contaminants into an environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms

3. Water pollution Water pollution is the contamination of water bodies (e.g. lakes , rivers , oceans , groundwater ). Water pollution occurs when pollutants are discharged directly or indirectly into water bodies without adequate treatment to remove harmful compounds.

5. Point source pollution refers to contaminants that enter a waterway through a discrete conveyance, such as a pipe or ditch . Examples of sources in this category include discharges from a sewage treatment plant, a factory , or a city storm drain

8. Hard and Soft Water with Soap HARD WATER water which does not readily forms a leather with soap . This hardness is due to the presence of dissolved Ca ,Mg, in the water. Water without hardness is called SOFT WATER

9. Distribution of water on Earth WATER SOURCE PERCENT OF TOTAL WATER OCEANS 97.24% ICECAPS,GLACIERS 2.14% GROUNDWATER 0.61% FRESHWATER LAKES 0.009% INLAND SEAS 0.008% SOIL MOISTURE 0.005% ATMOSPHERE 0.001% RIVERS 0.0001% TOTAL WATER VOLUME 100%

11. Marine pollution Marine pollution occurs when harmful effects, or potentially harmful effects, can result from the entry into the ocean of chemicals, particles , industrial, agricultural and residential waste , noise, or the spread of invasive organisms . Most sources of marine pollution are land based. The pollution often comes from nonpoint sources such as agricultural runoff and wind blown debris.

23. Case study: The Ganges : troubled waters

24. Thank you for your cooperation