The solution to pollution is dilution. This has been the mantra of people who would like to think water pollution can be avoided simply by adding enough water to the muck. The trouble is, there are too many people and too many factories in the world and not enough fresh water. In fact, one of the world’s biggest problems is a lack of clean drinking water.
Then again, these rivers could simply be cleaned up.
The following article lists the ten most polluted rivers in the world. It may not include the worst, who’s to say? But all of these waterways are objectionably dirty, some of which so incredibly filthy you have to wonder why anybody would even go near them, much less drink from them. Yet people do so, as they must, because they have little or no choice.
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Located in the Buenos Aires Province of central-eastern Argentina, the Matanza-Riachuelo River (MRR) has been nicknamed the Slaughterhouse River, because many slaughterhouses and tanneries line its banks and, tragically, dump their effluent into the river, polluting this short waterway with various toxic chemicals, particularly heavy metals such as arsenic, chromium, mercury, zinc, lead and copper. Raw sewage and household garbage are also added to the mess.
In 1993, President Carlos Menem presented a project designed to spend $250 million to clean up the river, but only one million was spent to rid the river of industrial wastes. Tragically, much of this money was allocated to other projects and/or pilfered by politicians. Therefore, as of December 2013, the MRR remains one of the most polluted rivers on the planet.
The Cuyahoga River is famous – or infamous – for having caught fire numerous times since 1868, most recently in June 1969. Flowing through the Cleveland, Ohio area, the Cuyahoga River, because it runs through a congested urban environment, has been subjected to numerous forms of pollution, particularly industrial waste, which has made it flammable at times. Interestingly, the plight of the Cuyahoga River helped promote in the late 1960s the ecological movement across the U.S., whose motto was “Ecology Now.” This joint fervor led to passage of the Clean Water Act of 1972.
Not quite so polluted these days, since some species of aquatic life can actually survive in it, the Cuyahoga River nevertheless remains one of 43 Great Lakes Areas of Concern, as it empties into Lake Erie, once a very dirty body of water as well, though it supports fisheries of note.
Also known as the Old Ganges, the Buriganga River in Bangladesh, one of the world’s most densely populated countries, suffers from just about every type of pollution imaginable: chemical waste from textile mills and factories of all kinds, domestic garbage, rotting fruit and vegetables, medical waste, sewage, dead animals, plastics and petroleum. In fact, the city of Dhaka dumps 4,500 tons of solid waste into the river every day. The sewage dumped into the river is a major problem as well, as about 80 per cent of it is untreated.
These days, particularly near Dhaka, a city of 10 million people, the Buriganga River emits a foul smell and no aquatic life can survive in it. One way to clean up the river at least somewhat would be to increase its flow of water, but this option will be difficult since the glaciers of the Himalayas, which feed the river, are shrinking due to climate change. Of course, a better option would be to stop dumping garbage and various poisons into the river, although this option will be very costly.
The Marilao River flows through the Bulacan Province in the Philippines and eventually empties in Manila Bay. The river suffers from various forms of pollution from tanneries, textile factories, piggeries, gold refineries and municipal dumps. The high levels of toxic chemicals and heavy metals in the water are particularly worrisome, as they present a major health hazard. In fact, in places, the water in the Marilao River contains virtually no dissolved oxygen, negating aquatic life to a great degree. Therefore, the Marilao River is considered one of 50 dead rivers in the Philippines.
Fortunately for the people of the Philippines, Greenpeace has been studying the problem of water pollution in the Philippines and produced the report “Hidden Consequences,” which could at least focus attention on the problem and perhaps persuade the Philippine government to generate funds for clean-up of the Marilao and other filthy rivers in this Pacific archipelago.
In a continent where most if not all the rivers are polluted, the Sarno River in southern Italy, near Pompeii and Naples, iis widely considered the most polluted river in Europe. The upper reaches of the river near Mt. Sarno are nearly pristine, but the lower one travels in elevation, the more polluted the river becomes, until it’s covered by oily scum and chemical foam. Fouled by industrial and agricultural wastes and plenty of urban garbage, the Sarno River is considered the primary source for polycyclic aromatic hydrocarbons (PAHs) in the Bay of Naples. Interestingly, PAHs are the greatest source of organic pollutants.
Encouragingly, Italy plans to clean up the Sarno and other rivers in the area. In fact, remedial dredging began on the Sarno River in the early 2000s, so perhaps at least some of the pollution will be mitigated, if not eliminated, in the coming years and decades.
Pollution of rivers is also widespread in the United States. The mighty Mississippi River, also called the Big Muddy, because its waters are generally brown, mostly from sediments. But the Big Muddy holds much more than mud, for its level of pollutants is great. In fact, it is sometimes called the Colon of America. In addition to sewage, perhaps the worst pollutants in the river are agricultural in nature. At the mouth of the Mississippi in the Gulf of Mexico lies a so-called Dead Zone of 6,000 to 8,000 square miles. This has been created by the Mississippi’s high amount of nitrogen-based fertilizer run-off, which upsets the food chain, creating very low oxygen levels in coastal waters.
Green advocates hope to cleanse this impressive river by urging the U.S. Environmental Protection Agency to include agricultural run-off - particularly nitrogen and phosphorus pollution - under protocols set by the Clean Water Act of 1972. But the federal government wants the states to act first, so we’ll see how this scenario unfolds.
The Citarum River, located in West Java, Indonesia, flows through a basin populated by millions of people using the river’s water for drinking, fishing, agriculture and industrial applications. The problem is, thousands of factories line the river and routinely dump their waste into it, turning the water various ugly colors. These factories are supposed to clean the water after they use it and dump it back into the river, but this process is rarely done and violators rarely prosecuted.
Shockingly, the Blacksmith Institute has declared that lead pollution in the Citarum River is 1,000 times the acceptable level as set by America's Environmental Protection Agency. Because of this ecological catastrophe, the Citarum River is considered by many to be the dirtiest river in the world.
In current times, the Asian Development Bank has loaned Indonesia $500 million over 15 years to help clean up the Citarum River. But, since so many people and industries use the Citarum’s water, cleansing it may remain more fantasy than reality, unless billions rather than millions are spent on clean-up.
The Doce River, which means “sweet water,” runs through southeast Brazil for 853 kilometers, providing much needed fresh water for the largest steel making region in Latin America. Unfortunately, in November 2015, location Mariana, two containment dams ruptured, spilling 60 million cubic meters of iron ore sludge into the Doce River, killing at least 17 people and injuring scores of others. This sludge is so loaded with heavy metals that the aquatic life in this once sweet river has been destroyed and may never return to normal, devastating the lives of numerous fishermen. Many people use the river for drinking water as well; now they must drink bottled water for months, years, who knows how long.
BHP Billiton, the world’s largest mining conglomerate, which built the aforementioned dams, has been sued by the government of Brazil for $5 billion. But who knows when or if the Doce River will ever be cleaned up after this ecological catastrophe, one of the worst in world history.
The condition of the Yellow River, whose water is filled with a yellow sediment known as loess, hence its name, is essential to the well-being of China, though at times the river has flooded, killing millions of people. These days, the river is troublesome in another way: The water in it is so egregiously polluted that it’s unfit even for agricultural use. In fact, in any given year, more than four billion tons of sewage is dumped into the river. And, as China continues to industrialize at breakneck speed, the Yellow River has become a toxic waste dump, turning river water colors other than yellow, at the very least.
But there are environment activists in China who would like to clean up the Yellow River. Green Camel Bell, established in 2004, is dedicated to the improvement of declining ecosystems in western China. This group, however, will do little more than educate people. The Chinese government must stop cities and industries from dumping waste into the river, then perhaps the color of the Yellow River will return to its former color.
The Ganges River, the most sacred river in Hinduism and the third largest river (by discharge) in the world, holds water that can purportedly cleanse people of sin. Many Hindus think the river’s water is so healthful they actually drink it as if it were an elixir. Be that as it may, the importance of the river cannot be overestimated, as it affects the lives of 400 million people who live near it. Unfortunately, people dump their waste into the Ganges as they use it for drinking, bathing and cooking, giving rise to many water-borne illnesses. In fact, people who can’t afford cremation throw corpses into the river. It’s hard to imagine a filthier river than the beloved Ganges.
Nevertheless, attempts are being made to clean up the Ganges River. The Ganga Action Plan, began in 1985 and considered one of the greatest efforts to clean up a polluted river in the world, has been an abject failure because it’s vastly underfunded. Still, this is a start, and everyone should hope the Ganges River runs clean again.
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