Broadly speaking, water contamination can be defined as the deviation of the water properties of the normal state, or the purity of nature. This happens when water is heavily contaminated by remnants of sewage and waste.
Judging from the result, there are two kinds of pollutants that enter the waters. The first is that the material is toxic and damaging that can kill micro-organisms living in the water. The second is that materials enriching the waters, so that it can help stimulate the growth of micro-organisms and algae.
Water contamination can be classified into 3 types :
1. Contamination in physics, this pollution can be caused by floating material and buildup.
2. Chemical contamination, this pollution caused by hazardous substances, could be carbon compounds or inorganic compounds.
3. Biological contamination, this pollution caused by certain organisms such as pathogenic microbes, algae, or plants that could potentially carry the water hazard.
People often assume that the waste industry is the largest contributor to the occurrence of water contamination. Actually in quantity, industrial waste does not the biggest pollutants factor. Truly are the biggest pollutants factor comes from of everyday human activities, such as household waste, agricultural waste, stock husbandry waste, fishery waste, transportation, etc..
For example, household waste is discharged into the river can disrupt the microbial life in the water, resulting in a decrease in the quantity and quality of aquatic biota. Remnants of water-soluble fertilizers can also fertilize aquatic plants that trigger the silting of the river or lake. Result of erosion and mud carried down to the sea will sink, and cover the surface of coral reefs, causing the death of coral reefs.
Currently waste from industrial activities can be said to have brought a serious threat to water contamination. Although many industries are implementing advanced technologies in waste water treatment, but still there are industries with no qualified industrial waste water treatment standards. It is very unfortunate, the regulations have been made, but there are still those who violate them.
Waste from industry-which does not meet these standards provide a serious threat to the entire ecosystem. Because through natural mechanisms such as wind, water flow, and the movement of soil, the diffusion of the waste can spread quickly everywhere.
Need to build a collective consciousness to prevent water contamination. Not easy, but not impossible to achieve. Humans should be fully aware of the importance of water for life.