BIOLOGICALLY DEAD
by Antonio C. Antonio
October 16, 2014
What is water pollution?
Water pollution is any physical, biological, or chemical change in water
quality that adversely affects living organisms or makes fresh water
unsuitable.
What are the parameters in classifying fresh water? These are: (1) Dissolved Oxygen [DO]; (2) pH;
(3) Biochemical Oxygen Demand [BOD]; and, (4) Total Coliform. This set of parameters is important in
determining the degree and/or level of water pollution and the mitigation
(meaning: the action of reducing the severity, seriousness, or painfulness of
something) required to address the problem.
However, pollution of any degree or level is still considered water pollution.
What are the sources of water pollution? Water pollutants come in the form of organic
wastes, toxic and persistent substances, radioactive substances, plant
nutrients, and sediments. Unrestricted
increase in nutrients or organic matter often causes microorganisms to
proliferate; including pathogenic ones.
There are two types of water pollution sources. Most “point” water pollutants come from:
- Runoff from roads;
- Household and residential waste;
- Manufacturing discharges;
- Industrial waste water discharges;
- Public sewage;
- Septic tanks; and,
- Mine tailings.
“Non-point” sources of water pollution come from
agricultural farming areas in the form of pesticides and fertilizers run off
and leaching.
When rain water, considered pure, falls back to Earth and
run off or percolates (meaning: filter gradually through a porous surface or
substance) it eventually gets stored as fresh ground water in aquifers
(meaning: a body of permeable rock that can contain or transmit
groundwater). When ground water is pumped
out for use, it now can be contaminated and polluted. “Water acts as an effective medium of
pollutants.” (Antonio, 2014, “How Much
Water Do We Have?”, http://antonantonio.blogspot.com/2014/10/how-much-water-do-we-have.html)
Fresh water sources such as esteros, urban waterways,
streams, rivers and lakes are traditionally being used as dumping sites for
effluents (meaning: Liquid waste or sewage discharged into a river or the sea)
from all sources (industrial and residential).
Many of these water systems, contain high concentrations of toxic
effluents, very high BOD and low DO, are considered biologically dead.
Just my little thoughts…
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