Transcript Water Pollution & Treatment

Water Pollution & Treatment
Science 8
Chapter 2C
NCSCOS 3.07
Warm-Up: copy each sentence
with the correct response.
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The 3 classes of indicators are
____, biological, and chemical.
Nitrates from fertilizers found in
a water supply are _________.
The dirtiness or cloudiness of
water is ______.
pH is a method of measuring the
_____ of water.
An living organism that is used to
evaluate water health is a
_______.
______ can form in turbid water
or in the presence of nitrates.
A _____ is an area of land that
shares the same water.
Bioindicator
 Physical
 Watershed
 Algal Blooms
 Chemical
indicators
 Acidity
 Turbidity

What is Pollution?
A pollutant is any substance or form of
energy that can cause harm to the
environment and make it unfit for
organisms.
Two types of water pollution:
1. Point Source
2. Non-Point Source
Water Pollution Sources
 Point
Source- you know the one source
of pollution; it is identified; easier to
detect and control
 Non-point
Source- comes from many
sources that can not be easily identified;
harder to control
Point-Source examples:
Pipe from Sewage Plant
 Pipe from Industrial Factory

Point-Source examples:
Point-Source examples:

Oil Tanker Spill
Non-Point Source examples:
RUNOFF!!!
 Water comes from across a large, more
diffuse area of land
 From…farms, lawns, parking lots, streets,
construction sites, acid rain from air
pollution, etc.

Non-Point Source examples:
Non-Point Source examples:
Non-Point Source examples:
Non-Point Source examples:
Biomagnification/Bioaccumulation
Pollution gets into smaller organisms
 Amount builds up as it gets passed up food chain
 Chemicals could end up in food eaten by humans

North Carolina Pollution

Sedimentation – increases turbidity
◦ Erosion
◦ Development
◦ Agriculture – tilling soil, irrigation, livestock

Nutrient Pollution – increases Nitrate &
Phosphate levels in water



 Algae Low Oxygen
Fertilizers run off in storm water
Fecal Coliform Bacteria from animal feces
Water Treatment

Sewage Treatment Plants
◦ Process raw waste & get water ready to enter
back into rivers
◦ 1.) Sludge separated, chlorine used to kill
harmful bacteria
◦ 2.) Oxygen & sludge-eating bacteria used

Septic Systems
◦ Small wastewater system used by home or
business in rural area
◦ Sludge consumed by bacteria
◦ Cleaner water exits & spreads into ground
Septic System
Water Treatment
Drinking Water Treatment Plants:
 1. Water piped in from river or lake
 2. Flows through mixers, clumping agents
& chemical disinfectants added
 3. Clarifying pool separates large particles
 4. Filters separate tiny particles of dust &
dirt
 5. Chlorine used to kill bacteria
 6. Clean water goes to water storage tank

EPA
The Environmental Protection Agency
sets and enforces water quality standards
for wastewater, pollution & drinking
water.
 Focuses on protection of surface
freshwater resources

What can we do to help?!
Pick up pet waste
 Pick up litter
 Plant vegetation
 Dispose of chemicals & wastewater
appropriately
 Reduce amount of water used
