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There
are two types of source water pollution: point and nonpoint. Point source
pollution comes from single specific locations. Examples of this type
of pollution include sewage treatment plants, manufacturing plants, and
large confined livestock feeding facilities. Point source pollution sites
are usually easy to identify and control. Controlling point source discharges
came under federal regulations in 1972.
Water
covers 75 percent of the earth's surface. It would seem that we have enough
water for all mankind. Realization that 97 percent of the earth's water
is found in oceans is a sobering first step. About two percent of the
remaining three is stored in ice caps, glaciers, and snowy mountain ranges.
So that leaves one percent of the earth's water supply for our daily water
supply needs. Considering that one percent of earth's water is the only
fresh, or drinkable water available, we should each do our part to help
protect it.
Nonpoint
source pollution occurs over a large area, over a period of time, and
from a large range of sources from both rural and urban areas. Nonpoint
source pollution sites are hard to identify and control, because the contaminants
are not usually traceable to an exact source. Nonpoint source pollution
results from a wide variety of human activities on land. Each of earth's
residents can contribute to the problem without even realizing it. What
isn't readily known can hurt the environment. When rain falls or snow
melts, chemicals and other pollutants around the house, workplace, and
everywhere in between, get picked up and carried as runoff into the ground,
storm drains, and surface water. What can be done to help protect ground
and surface water from nonpoint source pollution? A start can be made
at home, the workplace and everywhere in between.
Some
handy tips to help alleviate non-point source pollution around your house
include the following:
- Clean up after your pets to avoid runoff of
nutrients and potential disease-causing microorganisms;
- Have underground
storage tanks checked for leaks;
- Never pour toxic household chemicals
down the drain, sewer, or on the ground (Take them to the appropriate
waste collection center.);
- Recycle used oil and antifreeze by taking
them to service stations and other recycling centers;
- Buy and use recycled
products;
- Schedule regular tune-ups for your car to reduce deposition
of toxic pollutants and petroleum byproducts from exhaust gases;
- Have
your septic system inspected and maintained regularly;
- Protect areas
around wells to ensure that contamination does not occur;
- Use integrated
pest management practices where appropriate;
- Select porous materials
such as gravel for walkways and driveways to increase filtration and decrease
surface runoff;
- If you live by a shore, contour your lawn to reduce
runoff into the water;
- Spread mulch on bare ground and plant bare patches
to prevent erosion and runoff;
- Test your soil before applying fertilizers
to achieve proper application levels and minimize nutrients leaching into
groundwater or running off into surface waters;
- Keep fertilizers off
paved areas, including driveways and sidewalks, to prevent rain from washing
the nutrients into the street and storm drains; and
- If you use a professional
lawn care service, select a company that follows practices of applying
fertilizers and pesticides sparingly and properly.
The
items covered here are ways to help reduce nonpoint source pollution around
the house but they can and should be practiced no matter where. Use non-toxic
or less toxic chemicals whenever possible. Many chemicals used around
the home are toxic.Use household chemicals only as directed. Soil cannot
filter most chemicals and those will likely end up as runoff. Finally,
remember to dispose of your chemicals in an approved manner, such as household
chemical collection events sponsored by your local governments.
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