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WATER CONTAMINATION: SOURCES & SOLUTIONS
Sources of Water Contamination
Water contamination comes from three primary sources:
1. Rainwater: It is usually safe to drink, but rainwater has become increasingly contaminated due to air pollution in various areas of the world.
2. Surface water: Storm water runoff can pollute rivers, streams and lakes, and much of the contamination comes from agriculture and industry.
3. Groundwater: Water from underground aquifers is usually safe to drink, but over the past few years contamination has increased. Water that is deep underground is more protected from many types of contamination. Geology and soil makeup also affect water quality. Groundwater may be contaminated by naturally occurring elements like arsenic, selenium or boron.
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Groundwater is also one of our most important sources of water for irrigation. Unfortunately, groundwater is susceptible to pollutants. Groundwater contamination occurs when man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use.Contaminants such as chemicals, nutrients, and heavy metals are carried from farms, factories, and cities by streams and rivers into our bays and estuaries; from there they travel out to sea. Meanwhile, marine debris—particularly plastic—is blown in by the wind or washed in via storm drains and sewers.