Meghan Hodges
Lakes are vital to ecosystems, local communities, and the environment, providing drinking water, supporting biodiversity, and serving as popular recreational destinations. However, many of these precious water bodies in the United States are suffering from severe pollution. Agricultural runoff, industrial waste, untreated sewage, and invasive species are among the leading causes of lake pollution, threatening the health of these lakes and the lives that depend on them. This introduction will discuss the state of lake pollution in America, highlighting the impacts, causes, and efforts to restore these vital water bodies.
| Characteristics | Values |
|---|---|
| Lakes with the highest pollution | Lake Erie, Lake Okeechobee, Lake Apopka, Lake Onondaga, Lake Champlain, Lake Pontchartrain, Lake Cayuga, Lake Michigan |
| Causes of pollution | Industrial waste, agricultural runoff, untreated sewage, invasive species, municipal waste, nutrient runoff, chemicals, toxic pollutants, pesticides, heavy metals, oil and garbage |
| Impact of pollution | Harmful to fish and other aquatic life, health issues for nearby communities, undrinkable water, loss of scenic beauty, dead zones |
| Solutions | Conservation efforts, stricter laws and regulations, cleanup efforts, improved farming restrictions, increased water filtration, better agricultural practices, stronger enforcement of Clean Water Act |
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What You'll Learn
The Clean Water Act
Many lakes in America are polluted, with Lake Erie being the dirtiest of the Great Lakes. Other polluted lakes include Lake Onondaga, Lake Okeechobee, Lake Apopka, and Cayuga Lake. Pollution in these lakes is often due to industrial and agricultural runoff, as well as municipal waste and nutrient runoff. This has led to high concentrations of bacteria, low oxygen levels, and an increase in toxic mud, resulting in the destruction of fish populations and harm to surrounding wetlands and wildlife.
To address water pollution, the Clean Water Act (CWA) was established to regulate the discharge of pollutants into the waters of the United States and set quality standards for surface waters. The basis of the CWA was first enacted in 1948 as the Federal Water Pollution Control Act, but it was significantly reorganized and expanded in 1972, when it gained its common name, the Clean Water Act.
The CWA made it unlawful to discharge any pollutant from a point source into navigable waters without a permit. The Environmental Protection Agency (EPA) implemented pollution control programs, such as setting wastewater standards for industries, and developed national water quality criteria recommendations for pollutants in surface waters. The Office of Water (OW), a division of the EPA, ensures drinking water safety and works to restore and maintain oceans, watersheds, and aquatic ecosystems to protect human health and support economic and recreational activities.
Through the implementation of the CWA, progress has been made in reducing water pollution and restoring lakes and their surrounding ecosystems. Onondaga Lake, once known as one of the most polluted lakes in America, has undergone a transformation due to cleanup efforts. The lake's water quality has improved, and it now supports a diverse range of aquatic life, with more than 60 species of fish swimming in its waters. This turnaround has positively impacted the local community, and residents are gradually reconnecting with the lake and its natural beauty.
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Industrial dumping
Lake Erie is another example of a lake that has suffered from industrial pollution. By the 1960s, Lake Erie had become predominantly polluted, largely due to the heavy industrial presence along its shores. Factories had been dumping chemical pollutants into the lake and the waterways that flowed into it, such as the Cuyahoga River in Cleveland, Ohio, and the Detroit River in Michigan. The pollution had severe impacts on the lake's wildlife, and it was reported that "Lake Erie is dead" in national publications during the late 1960s. Despite ongoing conservation efforts and stricter regulations, it is estimated that it will take decades to fully restore Lake Erie.
Lake Michigan, the second-largest Great Lake by volume, has also faced industrial pollution issues. In the past, an Army Corps of Engineers dredged and spread contaminated harbor mud around the waters, contributing to the lake's pollution. Additionally, industrial facilities have been known to release pollutants beyond their permit limits, with a U.S. Steel facility in Indiana repeatedly dumping hexavalent chromium, a carcinogen, into a waterway that flows into Lake Michigan.
Other lakes in America that have been impacted by industrial dumping include Lake Superior, which has received military and industrial waste containing explosives, heavy metals, pesticides, and volatile organic compounds. Florida's lakes, such as Lake Okeechobee and Lake Apopka, are also highly polluted, although the specific sources of pollution are not clearly stated. Overall, industrial dumping has been a significant contributor to lake pollution in America, and while efforts are being made to clean up these lakes, it is a long and challenging process.
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Agricultural runoff
Lake Erie, the fourth-largest lake in North America by surface area, is a prominent example of the impact of agricultural runoff. With approximately 12 million residents, the lake has been subjected to constant contamination from agricultural and industrial sources. Conservation efforts and stricter regulations have led to improvements since the 1970s, and species such as walleye and Blanding's Turtles are making a comeback. However, it will still take decades to fully restore Lake Erie.
New York is another hotspot for polluted lakes, with Onondaga Lake in Syracuse gaining a reputation as one of the most polluted lakes in America due to municipal waste and industrial dumping. After years of cleanup efforts, the lake has seen a remarkable transformation, and more than 60 species of fish now inhabit its waters. The final phase of the cleanup is set to begin, including suctioning toxic mud from the lake bed and addressing contaminated groundwater.
Cayuga Lake in New York and Lake Okeechobee and Lake Apopka in Florida have also faced significant environmental pollution from agricultural runoff, sediment, and other pollutants. Additionally, the St. Johns River in Florida has struggled with pollution challenges due to industrial discharges and nutrient runoff. While not a lake, it is a significant waterway that has been impacted by these issues.
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Invasive species
The Great Lakes are particularly vulnerable to invasive species due to their role as a freshwater invasion pathway to the 31 states within the Mississippi River watershed and beyond. Some of the most well-known invasive species in the Great Lakes include sea lampreys, zebra and
Invasive carp species, such as grass carp, silver carp, black carp, and bighead carp, are also closely monitored for introduction and spread in the Great Lakes. Federal and state fishery agencies have successfully prevented these carp species from establishing themselves in the Great Lakes through contract fishing, modernizing barriers, and conducting eDNA surveillance.
The introduction and spread of invasive species in lakes across America highlight the urgent need for environmental protection and sustainable practices. Through initiatives like the Great Lakes Restoration Initiative (GLRI), efforts are being made to prevent new introductions and control existing populations of invasive species.
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Sewage and sanitation
However, this belief has since been disproven, and it is now known that untreated wastewater can cause significant harm to the environment and human health. Contaminated water affects drinking water supplies, habitats, and recreational sites, and can lead to health issues such as gastroenteritis and upper respiratory diseases. In the case of Onondaga Lake in New York, the water was so polluted that few people alive today remember when it had beaches, boathouses, and an amusement park on its shore. The pollution was caused by a combination of municipal waste and industrial dumping, with as much as 20 pounds of mercury being dumped into the lake every day.
While there have been efforts to improve sewage treatment and sanitation in the United States, the problem of water pollution persists. Even with federal funding for sanitation and improvements to treatment facilities, there are still instances of malfunctioning wastewater treatment systems, such as in Barry-Easton District, Michigan, where 10% of the state's 1.3 million on-site wastewater treatment systems are malfunctioning, causing sewage to run into lakes and streams.
To address these issues, there is a need for continued investment in infrastructure upgrades and maintenance, as well as stricter regulations and enforcement to prevent the discharge of untreated sewage into water bodies. Financial assistance for improvements to sewage treatment facilities is available through programs such as the Clean Water State Revolving Fund, which provides low-interest loans to state and local governments. Additionally, there is a growing focus on the development of environmentally sound technologies (ESTs) for sanitation and water provision, such as through the White Water to Blue Water (WW2BW) Partnership Initiative.
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Frequently asked questions
The main causes of lake pollution in America include agricultural runoff, industrial waste, untreated sewage, and invasive species.
Onondaga Lake in Syracuse, New York, has been called the most polluted lake in America due to municipal waste and industrial dumping. However, cleanup efforts have been underway, and the lake's health is improving.
Lake pollution has severe consequences for the environment and ecosystems. It destroys fish populations and marine life, harms surrounding wetlands and wildlife, and poses risks to human health. High levels of bacteria and low oxygen levels can result in the destruction of aquatic life.
Various steps are being undertaken to tackle lake pollution in America. These include conservation efforts, stricter laws and regulations, improved farming restrictions, increased water filtration, and the implementation of the Clean Water Act in 1972.
Yes, there are success stories in restoring polluted lakes in America. Onondaga Lake, once considered the most polluted, has undergone a remarkable transformation due to cleanup efforts. Lake Erie, despite being one of the most polluted lakes, has shown improvements since the 1970s, with the return of walleye and other wildlife species.
