This document discusses water pollution, including its types (biological, chemical, physical), causes (industrial waste, sewage, oil spills, radioactive waste, fertilizers and pesticides), effects (damaged ecosystems, animal and human health impacts), and approaches to control and prevention (pollution prevention, protection of groundwater resources, roles of government agencies). It emphasizes that water pollution poses serious threats and that concerted efforts are needed to address its sources and protect water resources.

1. ENV 101
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Ferdous Ahmed id:1430300
Md. Nuruddin Zahid id:1430497
Jahidul Islam Shamon id:1430349
Md. Jahidul Alam id:1430311
Ikram Hossain id:1421091

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

3. Types Of Water Pollution
1.Biological
• Infectious Disease ( Pathogens )
• Oxygen-Demading Waste
2. Chemical
• Nutrients ( Fertilizers )
• Toxic Inorganic Materials
• Persistent Organic Pollutants
(POPs)
3. Physical
• Sediments
• Thermal Pollution
• Solid waste

4. Causes of Water Pollution
1. Industrial waste:
Industries produce huge
amount of waste which
contains toxic chemicals and
pollutants which can causes
water pollution as well as air
pollution to our environment.
They contain pollutants such
as lead, mercury, sulphur,
asbestos, nitrates and many
other harmful chemicals.

5. 2. Sewage and waste water:
The sewage and waste water
that is produced by each
household is chemically
treated and released in to sea
with fresh water. The sewage
water carries harmful bacteria
and chemicals that can cause
serious health problems.
Pathogens are known as a
common water pollutant.

6. 3. Marine Oil Spilling:
Oil spill pose a huge concern
as large amount of oil enters
into the sea and does not
dissolve with water; there by
opens problem for local
marine wildlife such as fish,
birds and sea otters. For e.g.:
a ship carrying large quantity
of oil may spill oil if met with
an accident and can cause
varying damage to species in
the ocean depending on the
quantity of oil spill, size of
ocean, toxicity of pollutant.

7. 4. Radioactive Waste:
Nuclear energy is produced
using nuclear fission or fusion.
The element that is used in
production of nuclear energy is
Uranium which is highly toxic
chemical. The nuclear waste
that is produced by radioactive
material needs to be disposed
off to prevent any nuclear
accident. Nuclear waste can
have serious environmental
hazards if not disposed off
properly. Few major accidents
have already taken place in
Russia and Japan.

8. 5. Chemical fertilizers and pesticides:
Chemical fertilizers and pesticides are
used by farmers to protect crops
from insects and bacterias. They are
useful for the plants growth.
However, when these chemicals are
mixed up with water produce
harmful for plants and animals. Also,
when it rains, the chemicals mixes up
with rainwater and flow down into
rivers and canals which pose serious
damages for aquatic animals.
and ets..

9. Effects Of Water Pollution
• Ecosystems are destroyed by the rising
temperature in the water, as coral
reefs are affected by the bleaching
effect due to warmer
temperatures. Additionally, the warm
water forces indigenous water species
to seek cooler water in other areas,
causing an ecological damaging shift of
the affected area.
• Oil spills in the water causes animal to
die when they ingest it or encounter
it. Oil does not dissolve in water so it
causes suffocation in fish and birds.

10. • Swimming in and drinking contaminated
water causes skin rashes and health
problems like cancer, reproductive
problems, typhoid fever and stomach
sickness in humans. Which is why it’s very
important to make sure that your water is
clean and safe to drink.
• Human-produced litter of items such as
plastic bags and 6-pack rings can get aquatic
animals caught and killed from suffocation.
• Industrial chemicals and agricultural
pesticides that end up in aquatic
environments can accumulate in fish that
are later eaten by humans. Fish are easily
poisoned with metals that are also later
consumed by humans. Mercury is
particularly poisonous to small children and
women. Mercury has been found to
interfere with the development of the
nervous system in fetuses and young
children.

11. Water Pollution Control
Water pollution prevention and control measures are
critical to improving water quality and reducing the
need for costly wastewater and drinking water
treatment. Because water pollution can come from
many different sources, a variety of pollution
prevention and control measures are needed.
The preferred approach for the protection of
groundwater resources is pollution prevention.
Although drinking water standards generally apply to
the use of groundwater supplies, the raw water
supplies require protection from contamination.
Governmental entities such as ministries of health,
natural resources agencies, and environmental
protection agencies are generally responsible for such
activities. Groundwater pollution control efforts are
largely directed at protection of water bodies.

12. Conclusion
Water pollution is bad and it’s not good for people to drink
the water that’s polluted and for all organisms that need
water to survive. There are millions of people that don’t
have good clean access to water and that they even have
to drink the bad polluted water for them it survive, Sewage
can cause water pollution along with the toxic chemicals
from Industrial business. There are a bunch of water
pollutions like toxic and organic and thermal water. And
solutions to stop the water pollution are to clean up the
garbage and keep your yard clean. To try to stop the water
pollution clean up your yard and make sure there is no
garbage left anywhere around in the area you live like the
streets and neighborhood.