What is water pollution. here i also mention the types prevention of water pollution..

1. WELCOME
TO OUR
PRESENTATOIN

2. OUR PRESENTATION TOPIC IS :
Water pollution

3. WATER POLLUTION
Water pollution occurs when pollutants (particles,
chemicals or substances that make water contaminated)
are discharged directly or indirectly into water bodies
without enough treatment to get rid of harmful
compounds.

4. TYPES OF WATER POLLUTION
 1. Nutrients Pollution
 2. Surface water pollution
 3. Oxygen Depleting
 4. Ground water pollution
 5. Microbiological
 6. Suspended Matter
 7. Chemical Water Pollution
 8. Oil Spillage

5. CHEMICAL WATER POLLUTION ?
 Many industries and farmers work with chemicals
that end up in water.
 This is common with Point-source Pollution. These
include chemicals that are used to control weeds, insects
and pests.
 Metals and solvents from industries can pollute water
bodies

6. SURFACE WATER POLLUTION ?
 Surface water includes natural water found on the earth's
surface, like rivers, 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

7. NUTRIENTS POLLUTION ?
 Some wastewater, fertilizers and sewage contain high
levels of nutrients.
 If they end up in water bodies, they encourage algae and
weed growth in the water.
 This will make the water undrinkable, and even clog
filters.

8. OXYGEN DEPLETING ?
 Water bodies have micro-organisms. These include
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.

9. OIL SPILLAGE ?
o Oil spills usually have only a localized effect on wildlife
but can spread for miles.
o The oil can cause the death to many fish and get stuck to
the feathers of seabirds causing them to lose their ability
to fly.

10. INDUSTRIAL CAUSES OF WATER POLLUTION
Industrial cause huge water pollution with their activities.
 Sulphur – This is a non-metallic substance that is harmful for marine life.
 Asbestos – This pollutant has cancer-causing properties.
 Lead and Mecury – These are metallic elements and can cause
environmental and health problems for humans and animals.
 Nitrates & Phosphates– These are found in fertilizers, and are often washed
from the soils to nearby water bodies.
 Oils – Oils form a thick layer on the water surface because they do not
dissolve in water.

11. EFFECTS OF WATER POLLUTION

12. EFFECTS ON ECOSYSTEM
 Ecosystems can be severely affected or damaged by water
pollution.
 Low levels of oxygen in rivers and lakes due to water
pollution are a major cause for extinction of indigenous
organisms.
 Water pollution may also cause flooding due to accumulation
of solid waste The non-biodegradable pesticides and
chemicals cause mass destruction of aquatic life.
 Steep increase in the BOD[Biological Oxygen Demand] levels
of water etc.

13. EFFECT ON HUMAN HEALTH
 Humans are affected by water pollution.
 Diseases like hepatitis are caused by eating seafood that is poisoned
or contaminated.
 Polluted drinking water can causes cholera or typhoid infections and
also diarrhea.
 Highly polluted water can harm internal organs like heart and
kidneys.
 Synthetic organics cause serious damage to human health.
 Chemicals like fluoride, arsenic, lead, chlorine and petrochemicals
in water can causes adverse effect on human health etc.

14. EFFECTS ON ANIMAL HEALTH
 Water pollution kills life that depends on these water
bodies.
 Fishes and the aquatic organisms are poisoned due to
industrial chemicals and agricultural pesticides.
 Animals that eat dead fish from contaminated streams
are affected.
 Fish, birds, dolphins and many other animals are killed
by pollutants in their habitat.
 Reproduction rate in reduced in aquatic organisms.
Incidences of diseases increase etc.

15. PREVENTION OF WATER POLLUTION
 Never throw rubbish away anyhow. Always look for the correct
waste bin.
 Use water wisely. Do not keep the tap running when not in use.
 Do not throw chemicals, oils, paints and medicines down the sink
drain, or the toilet.
 Buy more environmentally safe cleaning liquids for use at home and
other public places.
 If you use chemicals and pesticides for your gardens and farms, be
mindful not to overuse pesticides and fertilizers.

16. CONCLUSION

17. THANK YOU