What effects does water pollution have on our environment
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Harm to any of these organisms can create a chain effect, imperiling entire aquatic environments. When water pollution causes an algal bloom in a lake or marine environment, the proliferation of newly introduced nutrients stimulates plant and algae growth, which in turn reduces oxygen levels in the water.
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Destruction of aquatic flora and fauna
There are countless species of plants and animals which depend upon water for their survival, making them the most susceptible to water pollution. The 2010 Deep Horizon oil spill, for example, adversely affected over 82,000 birds, 6,000 turtles, 25,900 marine mammals and an unquantified number of fish and invertebrates. Meanwhile, other forms of pollution can destroy the carefully balanced ecosystems and habitats of water-dwelling organisms, wiping out entire species altogether.
Drinking water supplies
Contaminating the sources from which we draw our drinking water supplies over the centuries means that 2.1 billion people – or just over a quarter of the world’s population – do not have access to safe drinking water. In fact, despite massive advances in innovative online water quality monitoring in drinking water networks, even prosperous countries can find themselves at the mercy of unclean drinking water. In 2014, the town of Flint in Michigan, USA, saw dangerous levels of lead infiltrate its supplies, meaning over 100,000 people were exposed and at least 12 killed.
Food chain disruption
Microscopic pollution of a body of water as big as the Pacific Ocean might seem negligible, but tiny microplastics, chemicals, heavy metals and other contaminants can be ingested by microorganisms and interfere with their inner organs. These are then consumed by larger animals and so pollution gradually works it way up the food chain. At some point, it’s feasible for the contaminants to wipe out a link altogether, or else reach the very top of the pyramid by compromising human health.
Agriculture
The delicate balance between water and agriculture is critical to the environment, so it’s imperative that the water used for irrigation of crops and sustenance of livestock is kept scrupulously clean. Failure to do so could damage the nutritional value of the yields produced by farmers or, worse yet, make them toxic to humans. Even if the problem is recognised before it can cause too much damage, the scarcity of water in the period while it is being resolved could lead to a drop-off in yields and result in food poverty for the world’s most vulnerable people.
Economic downturns
So far, all of the above consequences of water pollution have focused on the health impacts – but the costs of water pollution can be financial, too. Last year, the Japanese authorities announced that they were running low on space to keep contaminated water supplies from the Fukushima power plant disaster under containment. Studies have indicated that it’s likely to cost the government a very minimum of $660 billion to completely clean up the fallout from the incident.