Water pollution


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Water pollution

  2. 2. INTRODUCTION  Any change or modification in the physical, chemical and biological properties of water that will have a detrimental consequence on living things is water pollution.  Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans, aquifers and groundwater), very often by human activities.  Water pollution is the second most imperative environmental concern along with air pollution.
  3. 3. Types of water pollution 1. Nutrients Pollution 2. Surface water pollution 3. Oxygen Depleting 4. Suspended Matter 5. Chemical Water Pollution 6. Oil Spillage
  4. 4. Cont.…. 7. Ground water pollution 8. Microbiological
  5. 5. cont… Nutrient Pollution : Some waste water, fertilizers and sewages contain high levels of nutrients. If they end up in water bodies, they encourage algae and weed growth in the water. This will make water undrinkable and even clog filters. Too much algae will also use up all the oxygen in the water, and other water organism in the water will die out of oxygen from starvation. Surface water pollution : Surface water includes natural water found in the earth’s surface, like river, lakes, lagoons and oceans. Hazardous substances coming into contact with this surface water, dissolving or mixing physically with the water can be called surface water pollution.
  6. 6. cont… Oxygen Depleting : Water bodies have micro-organisms. These includes aerobic and anaerobic organisms. When to much biodegradable matter end up in water, it encourages more microorganism growth, and they use up more oxygen in the water. If oxygen is depleted, aerobic organism die, and anaerobic organism grow more to produce harmful toxins such as ammonia and sulfides. Suspended Matter : Some pollutants do not easily dissolve in water. This kind of material is called particulate matter. Some suspended pollutants later settle under the water body. This can harm and even kill aquatic life that live at the floor of water bodies.
  7. 7. cont… Chemical Water Pollutoin : Many industries and farmers work with chemicals that end up in water. These includes chemicals that are used to control weeds, insects and pests. Metals and solvents from industries can pollute water bodies. These are poisonous to many forms of aquatic life and may slow their development, make them infertile and kill them. Oil Spillage : Oil spills usually have only a localized affect on wildlife but can spread for miles. The oil cause the death of many fish and stick to the feathers of seabirds causing them to lose the ability to fly.
  8. 8. cont… Ground Water pollution : When humans apply pesticides and chemicals to soils, they are washed deep into the ground by rain water. This gets to underground water, causing pollution underground. This means when we dig wells and bore holes to get water from underground, it needs to be checked for ground water pollution. Microbiological : In many communities in the world, people drink untreated water(straight from a river or stream). Sometimes there is natural pollution caused by microorganism like virus, bacteria and protozoa. This natural pollution can cause fishes and other water life to die.
  9. 9. Causes of water pollution  Industrial * Home * Agricultural
  10. 10. Effects
  11. 11. Effects  Spread of disease: Drinking polluted water can cause cholera or typhoid infections, along with diarrhoea.  Affects body organs: The consumption of highly contaminated water can cause injury to the heart and kidneys.  Harms the food chain: Toxins within water can harm aquatic organisms, thus breaking a link in the food chain.
  12. 12. Cont.…  Causes algae in water: Urea, animal manure and vegetable peelings are food for algae. Algae grow according to how much waste is in a water source. Bacteria feed off the algae, decreasing the amount of oxygen in the water. The decreased oxygen causes harm to other organisms living in the water.  Flooding: The erosion of soil into waterways causes flooding, especially with heavy rainfall.  Harms animals: Birds that get into oil-contaminated water die from exposure to cold water and air due to feather damage. Other animals are affected when they eat dead fish in contaminated streams.
  13. 13. What we can do?  Turn off running water  Fertilized correctly  Dispose of Toxic Chemicals Properly  Organized and participate in a clean up  Avoid Plastics When Possible  The rivers must not be contaminated  Get Active and Get Involved  Spread awareness
  14. 14. Conclusion