Greta Jimenez
Lake Okeechobee, the second-largest lake in the southeastern United States, has been facing a water pollution crisis for over a century. The primary sources of pollution are excess nutrients from industries, agriculture, and urban development, particularly nitrogen and phosphorus, leading to harmful algal blooms. The lake receives runoff from the Kissimmee River watershed, which carries inorganic nitrogen from urbanized estuaries. The Army Corps of Engineers manages the lake's levels and has been criticized for releasing polluted water into nearby rivers and the ocean, impacting the environment and public health. The sugar industry and agricultural operations near the lake have been identified as significant contributors to the pollution. The battle against lake pollution is seen as a test of America's political system, as special interests and lobbying agendas influence the management of this crucial ecosystem.
| Characteristics | Values |
|---|---|
| Industries causing pollution | Sugar cane industry, agricultural operations, urban development |
| Pollutants | Phosphorus, nitrogen, phosphate, fertilizer, human waste |
| Effects | Toxic algae blooms, environmental damage, public health risks |
| Mitigation efforts | Fortifying the dike, building out the water treatment system, stopping water releases |
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What You'll Learn
Sugar cane farming
Sugarcane farming has been a prominent industry around Lake Okeechobee for over a century. The Sugar Cane Growers Cooperative of Florida, which was formed in 1960, is based in Palm Beach County, which accounts for approximately 75% of the state's commercial sugarcane acreage and harvested sugarcane tonnage. The Cooperative produces over 350,000 tons of raw sugar annually. The rich, organic soil, abundant water, sunshine, and warming influence of Lake Okeechobee are the primary reasons why sugarcane farmers are located in this area.
However, sugarcane farming has also been identified as a contributor to the pollution of Lake Okeechobee, particularly through the practice of burning sugarcane fields before harvesting. This practice leads to increased soot and ash in the air, contributing to air pollution and potentially impacting the water quality of the lake. Additionally, fertilizer runoff from sugarcane fields has been identified as a source of excess nitrogen and phosphorus, which are known to cause harmful algal blooms in the lake.
To address the issue of phosphorus runoff, regulations have been implemented, including the construction of 40,000 acres of natural filter marshes to reduce phosphorus in water flowing from farms and urbanized areas into Lake Okeechobee. A tax of $25 per acre and comprehensive water quality monitoring and reporting requirements have also been imposed. While farmers have exceeded the phosphorus reduction requirements, some argue that the standards were intentionally set too low, making it easier for the industry to comply.
Sugarcane farming practices, such as burning crops and fertilizer use, continue to face scrutiny for their potential impact on Lake Okeechobee's ecosystem and water quality. The industry's influence on political decisions and lobbying efforts to protect their interests have also been a subject of debate. As a result, sugarcane farming remains a complex and controversial issue in the ongoing efforts to address the pollution and environmental challenges facing Lake Okeechobee.
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Agricultural runoff
Lake Okeechobee is the largest lake in Florida and the second-largest in the southeastern United States. It is often referred to as the "liquid heart" of the state. However, over the years, Lake Okeechobee has become heavily polluted by agricultural runoff from Central and South Florida.
The Everglades Agricultural Area (EAA), located just south of the lake, is a major source of agricultural runoff. This region is primarily used for sugarcane cultivation and other agricultural activities. The private agricultural industry in this area controls the water flow for their irrigation, keeping the crops dry and the land drained for optimal growing conditions. This results in a significant amount of runoff water, which contains high levels of phosphorus and other nutrients. While the state of Florida has made efforts to address this issue by purchasing land in the EAA and constructing stormwater treatment areas to remove phosphorus, the agricultural industry in the region has resisted selling additional land for similar projects.
Another factor contributing to the agricultural runoff is the historical management of the lake itself. In 1928, a hurricane caused major flooding in the region, prompting the government to build a dam around Lake Okeechobee to prevent future flooding. They also diverted the water flow to the St. Lucie estuary in the east and the Caloosahatchee estuary in the west, instead of allowing it to flow naturally south into the Everglades. This diversion has disrupted the natural balance of the ecosystem and contributed to the pollution of the estuaries and nearby coastal areas.
The impact of agricultural runoff on Lake Okeechobee and the surrounding environment is significant. The excessive nutrients from the runoff have led to frequent and harmful algal blooms, which can have toxic effects on both the ecosystem and human health. The discharge of polluted water from the lake into nearby rivers and estuaries further exacerbates the issue, as the algae feast on the additional nitrogen and phosphorus in these waterways. This has resulted in environmental destruction, including the loss of submerged grasses and the decline of salt-loving marine plants and animals.
Addressing the issue of agricultural runoff requires a comprehensive approach. It involves implementing better practices for managing and treating agricultural wastewater, such as using state-owned lands for treatment areas and holding the agricultural industry accountable for treating their runoff. Additionally, revisiting the water flow diversions and exploring more sustainable ways to manage Lake Okeechobee's water levels can help mitigate the environmental impact on the lake and the surrounding ecosystems.
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Urban development
Excess nutrients from urban development, particularly nitrogen and phosphorus, are major factors in the harmful algal blooms. Inorganic nitrogen levels have been found to be elevated in urbanized estuaries and the Kissimmee River, which flows into Lake Okeechobee. This is due to human waste, which is a significant source of these nutrients in urban areas. The impact of nitrogen and phosphorus is synergistic, leading to more severe and persistent algal blooms.
Additionally, urban development has contributed to the pollution of nearby estuaries. When toxic algae blooms are flushed from the lake into these estuaries, they can feast on the elevated levels of nitrogen and phosphorus present, further exacerbating the problem. This has led to the death of salt-loving marine plants and animals in the affected areas.
The impact of urban development on the pollution of Lake Okeechobee highlights the complex interplay between human activities and the environment. It underscores the need for sustainable practices and effective water management strategies to mitigate the negative consequences of urbanization on fragile ecosystems.
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Nitrogen pollution
One significant contributor to nitrogen pollution in Lake Okeechobee is agricultural runoff. Fertilizers used on farms in the surrounding areas, including the Orlando region, wash off into the lake's watershed. This runoff contains high levels of nitrogen, providing an abundant food source for the algae, leading to excessive growth and toxic blooms. The historical focus on phosphorus reduction in the lake has contributed to the current nitrogen concerns, as excessive phosphorus loading in the past may have limited the impact of nitrogen.
Urban development also plays a role in nitrogen pollution. Inorganic nitrogen levels have been found to be elevated in urban estuaries and rivers flowing into Lake Okeechobee, such as the Kissimmee River. The development north of the lake has been particularly implicated, with suggestions that it contributes to the overall pollution issue. Additionally, human waste has been identified as another factor influencing the nitrogen levels in the lake.
The impact of nitrogen pollution in Lake Okeechobee is not limited to the lake itself. When the Army Corps of Engineers releases water from the lake, it can carry toxic algae blooms and pollutants to other water bodies, such as the Caloosahatchee River and the ocean. This release of polluted water poses risks to the environment and public health, affecting both marine life and people in the surrounding areas.
Addressing the issue of nitrogen pollution in Lake Okeechobee requires a comprehensive approach. Managing both phosphorus and nitrogen levels is essential, as their interplay influences the growth of harmful algae. This includes implementing measures to reduce agricultural runoff, such as promoting sustainable farming practices and improving water treatment systems. Additionally, addressing urban development's impact on nitrogen levels and the overall reduction of excess nutrients entering the lake are crucial steps in mitigating the nitrogen pollution challenge in Lake Okeechobee.
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Phosphorus pollution
Lake Okeechobee is the largest lake in Florida and the second-largest in the southeastern United States. It is also the main source of water that feeds the Everglades, one of the most diverse wetlands in the world.
Historically, Lake Okeechobee has been considered impaired for phosphorus, leading to targeted efforts to reduce phosphorus runoff from agricultural sources in the watershed. Dairy farms in the Taylor Creek basin, for example, were identified as a source of high concentrations of nutrients, leading to the purchase and removal of some farms. In addition, agricultural runoff best management practices were implemented to control soluble and particulate phosphorus.
Despite these efforts, phosphorus pollution in Lake Okeechobee remains a concern. Data from water management districts show that phosphorus concentrations in the lake rose slightly for two years and then spiked in 2017, reaching the highest levels in history. This spike in phosphorus loading led to a massive algae bloom that covered 90% of the lake the following year.
The toxic algae blooms caused by phosphorus pollution pose short- and long-term health risks to people and pets and threaten the delicate balance of the Everglades ecosystem. Managing phosphorus levels in Lake Okeechobee is crucial for preserving the health of this crucial ecosystem and the millions of people who rely on it for water and recreation.
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Frequently asked questions
Lake Okeechobee is the second-largest lake in the Southeastern United States and has been facing a water pollution crisis for over a century. The primary sources of pollution are toxic algae blooms, which are caused by excess nutrients from industries, agriculture, and urban development—particularly nitrogen and phosphorus.
The toxic algae blooms in Lake Okeechobee pose short- and long-term health risks to people and animals. The freshwater can also kill salt-loving marine plants and animals.
Large agricultural operations near the lake, such as Big Sugar and other farmers, are major contributors to the pollution. Excess fertilizer washing off farms and into the lake has been identified as a primary source of pollution.
Researchers from Florida Atlantic University's Harbor Branch Oceanographic Institute have conducted comprehensive sampling across the Lake Okeechobee Waterway to better understand and preserve the ecosystem. Additionally, the Army Corps of Engineers has temporarily stopped releasing polluted water from the lake into the Caloosahatchee River to allow the environment to recover.
The battle over Lake Okeechobee's pollution is seen as a test of the integrity of America's political system. Special interests, such as the sugar industry, have leveraged their political influence to prioritize their own benefits while spreading the costs of pollution across society.
