It can also involve interfaces, including estuaries, wetlands, and particularly its sediments that can absorb and release some pollutants. Sediment can be heavily polluted and retain traces of ancient pollution there are sometimes a great amount of shot and fishing lead where these activities are practiced.
The fight against pollution is very difficult because what is at the bottom of the water, or diluted in water is often invisible, and some toxic infiltrated into the ground often produce their effects after a long time and many pollutants act in complex synergies.
In addition, a spill of 4, liters of carbon tetrachloride, which occurred near Erstein in , which passed almost unnoticed at the time, twenty years later led to contamination of groundwater and dug a well seven kilometers downstream.
Nitrates can achieve some layers after several decades. Water pollution usually occurs by direct or indirect contact of contaminants with the water, in the absence of adequate measures for the treatment and disposal of hazardous substances. In most cases, contamination of water remains invisible because contaminants are dissolved in it.
Nevertheless, there are exceptions: There are also several natural pollutants. Aluminum compounds, which are in the ground, get into water as a result of chemical reactions. The floods washed out of the soil of grassland magnesium compounds, which cause great damage to fish stocks. However, the amount of natural contaminants is negligible compared with human caused pollution. Every year, thousands tons of chemicals with unpredictable effects get in water pools. The water can indicate elevated levels of toxic heavy metals such as cadmium, mercury, lead, and chromium , pesticides, nitrates, and phosphates, oil, surfactants, and drugs.
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The Importance of Rewriting Storm Water Regulations. Danielle Nielsen. Goochland High School. Abstract. This paper observes the negative and harmful effects of water pollution and storm water runoff on the environment and the surrounding community.
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