Kiera Jefferson
The Columbia River is a lifeline of the Northwest, draining water from a 259,000-square-mile basin across seven states and one Canadian province. The river is a vital source of salmon and steelhead, and its health is crucial for the region's economy, culture, and spirituality. However, the Columbia River faces significant pollution problems, including toxic contaminants, high temperatures, and agricultural and industrial runoff. With thousands of pipes releasing pollution into the river and its tributaries daily, the Columbia Basin also contains hundreds of contaminated waste sites, including the highly polluted Hanford Nuclear Site. These issues have led to toxic contamination in the river, affecting the health of both the ecosystem and humans who rely on the river as a food source.
| Characteristics | Values |
|---|---|
| Pollution Sources | Factories, wastewater treatment plants, runoff from agricultural lands, logging, industrial sites, city streets, pesticides, herbicides, and toxic chemicals |
| Pollutants | Mercury, polychlorinated biphenyls (PCBs), DDT, flame retardants, lead, radioactive waste, oil, and transformer oil |
| Health Risks | Organ damage, nervous system damage, reproductive system damage, and increased cancer risk |
| Ecological Impact | Loss of habitat, decline in salmon and steelhead populations, and bioaccumulation of toxins in larger animals like river otters and bald eagles |
| Initiatives | EPA's Superfund National Priorities List, Columbia River Basin Restoration Funding Assistance Program, and efforts by local organizations like Columbia Riverkeeper |
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What You'll Learn
Toxic contaminants in fish
The Columbia River is a lifeline of the Northwest, draining water from a massive basin of 259,000 square miles across seven states and one Canadian province. The river is home to hundreds of contaminated waste sites, including the Hanford Nuclear Reservation, which is the most polluted place in the Western Hemisphere. The Columbia River Basin is also home to over 200 hydroelectric dams, many of which have released oil through leaks and spills over the years.
In 2013, health officials in Oregon and Washington warned that consuming certain fish from the Columbia River could be harmful to people's health. This was due to the presence of elevated levels of mercury and polychlorinated biphenyls (PCBs) in the fish. PCBs are cancer-causing chemicals, and fish caught near Bradford Island, within the Bonneville Dam complex, contain the highest levels of these toxins in the Northwest.
Other toxic contaminants found in the river include pesticides and herbicides, which have altered the ecosystem and vegetation, favouring non-native, pollutant-tolerant species. A sampling of sediment in the lower Columbia River detected 49 different Chemicals of Emerging Concern (CECs), including estrogens, perfluorinated compounds, flame retardants, personal care products, and pharmaceuticals.
In addition to the chemical pollutants, physical pollutants such as heavy-test fishing lines and "ghost nets" (damaged or abandoned fishing nets) also pose a significant threat to the river's health and the safety of those who use it.
The contamination of the Columbia River has been a known issue for many years, with evidence of toxics in the river dating back to the mid-1990s. Despite this, there has been little protection and restoration of the river. Efforts are now being made to address the problem, with the Estuary Partnership working to secure legislation for funding to reduce toxic contamination in the Columbia Basin.
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![Saline-water contamination in Quaternary deposits and the Poplar River, East Poplar Oil Field, northeastern Montana / by Joanna N. Thamke and Steven D. Craigg ; prepared in cooperation [Leather Bound]](https://m.media-amazon.com/images/I/61IX47b4r9L._AC_UY218_.jpg)
Pollution from factories and wastewater treatment plants
The Columbia River is a vital resource for the Pacific Northwest, but it faces significant pollution challenges, including pollution from factories and wastewater treatment plants. Every day, thousands of pipes discharge pollutants directly into the river and its tributaries. The river basin is also home to numerous contaminated sites, including the Hanford Nuclear Site, which has been leaking radioactive waste into the river.
Factories and industrial sites contribute to the pollution of the Columbia River. These facilities release a range of pollutants into the river through their wastewater discharge. Toxic chemicals, heavy metals, and other hazardous substances are often released into the river, posing risks to both the environment and human health. In 2012, the Army Corps reported discharging over 1,500 gallons of PCB-laden transformer oil at the Ice Harbor Dam on the Snake River, a tributary of the Columbia River. This incident highlighted the potential for chronic leaks and spills from the many hydroelectric dams in the basin.
Wastewater treatment plants also play a role in polluting the Columbia River. Ineffective treatment processes can result in the discharge of untreated or partially treated sewage, which contains harmful bacteria, viruses, and nutrients that contribute to algae blooms and create dead zones in the river. In addition, the treatment plants themselves can become sources of pollution if they are not properly maintained or if they experience malfunctions or overflows during heavy rainfall events.
The cumulative impact of pollution from factories and wastewater treatment plants has severe ecological consequences for the Columbia River. Contaminants biomagnify as they move up the food chain, affecting larger species such as river otters, mink, and bald eagles who consume fish from the river. Certain species of fish, such as mountain whitefish, white sturgeon, and large-scale sucker, have been found to contain high levels of cancer-causing chemicals, posing significant health risks to those who consume them regularly.
Efforts are being made to address the pollution in the Columbia River. The Columbia River Basin Restoration Program, led by the EPA, aims to reduce toxic pollution and protect the health of people in the basin. The inclusion of the Upper Columbia River site on the Superfund National Priorities List in December 2024 underscores the recognition of the urgency of this issue. Additionally, the Lower Columbia Estuary Partnership is working to protect and restore the health of the estuary, which is of national significance. However, more comprehensive and stringent measures are needed to mitigate the pollution from factories and wastewater treatment plants and to ensure the long-term health of the Columbia River ecosystem and the communities that depend on it.
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Radioactive waste from the Hanford Nuclear Site
The Hanford Site, now known as the Hanford Nuclear Reservation, is the most polluted place in the Western Hemisphere. During the Cold War, the Hanford Site was expanded to include nine nuclear reactors and five large plutonium processing complexes, which produced plutonium for most of the 60,000+ weapons built for the U.S. nuclear arsenal. The Hanford Site was also a part of the Manhattan Project, developing plutonium for the Trinity Test and the bomb dropped on Nagasaki.
Many early safety procedures and waste disposal practices were inadequate, resulting in the release of significant amounts of radioactive materials into the air and the Columbia River. Radiation reached the Pacific Ocean 200 miles away, contaminating fish and soil on its way. The health effects of the pollution have been devastating, with higher rates of cancer in the surrounding area. In 1976, a Hanford technician, Harold McCluskey, received the largest recorded dose of americium following a laboratory accident. Since 1987, workers have reported exposure to harmful vapors after working around underground nuclear storage tanks, with no solution found.
Today, Hanford holds 56 million gallons of radioactive waste, which leaks into the soil and groundwater. This waste is held in underground tanks, many of which have never been replaced. In 2013, it was admitted that one tank was leaking up to 300 gallons a year, and the cleanup company took no action. Local residents and workers report unusually high rates of thyroid disorders, cancer, and handicaps, which they attribute to the river pollution. Native American communities, who rely on the river and salmon fishing, have been particularly affected.
The Hanford Site has become the focus of the nation's largest environmental cleanup. The true story of the harm done at the site has been ignored and dismissed, with the voices of workers and activists raising the alarm falling on deaf ears.
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Pesticides and herbicides
The Columbia River Basin is a significant waterway in the Pacific Northwest, but it has suffered from pollution and toxic contamination over the years. The river and its basin have been used as a dumping ground for various pollutants, including pesticides and herbicides, which have had detrimental effects on the environment and human health.
The Columbia River Basin is home to a diverse range of plant and animal life, including fish, birds, and other wildlife. The river and its tributaries provide habitat and food sources for these species. However, the use of pesticides and herbicides in the basin has resulted in the contamination of water, sediment, and the food chain.
When pesticides and herbicides are released into the environment, they can persist and accumulate in the water and sediment of the river. These chemicals can then be taken up by plants and animals, leading to bioaccumulation and biomagnification. This means that the concentration of these chemicals increases as they move up the food chain, affecting top predators and humans the most.
The presence of pesticides and herbicides in the Columbia River Basin has been linked to several negative effects. These chemicals have been found in fish tissue, indicating that they are being consumed by aquatic life. This has led to health advisories against consuming certain fish species, as these chemicals can cause damage to organs, the nervous system, and the reproductive system. Additionally, contaminants in the river have been found to cause male fish to morph into females during their life cycle, further disrupting the ecosystem.
Efforts are being made to reduce the impact of pesticides and herbicides in the Columbia River Basin. The Columbia River Toxics Reduction Working Group, formed in 2005, aims to coordinate toxin reduction work and share information between various organizations. This group has led to initiatives such as Pesticide Stewardship Partnerships in the Hood River and Walla Walla Basins, as well as legacy pesticide collection throughout the Basin. These efforts are crucial in mitigating the harmful effects of pesticides and herbicides on the river's ecosystem and the communities that rely on it.
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Dams and leaks
The Columbia River Basin is home to over 200 hydroelectric dams, many of which have released oil through chronic leaks and spills. In 2012, the Army Corps reported discharging over 1,500 gallons of PCB-laden transformer oil at the Ice Harbor Dam on the Snake River. Toxic contaminants can biomagnify, moving up the food chain and causing larger animals in the ecosystem, such as river otters, mink, bald eagles, osprey, and humans, to have extremely high levels of contaminants in their tissue.
The Columbia River Basin also contains hundreds of contaminated waste sites, including the Hanford Nuclear Site, which continues to leak radioactive waste into the river. In addition to the threat posed by dams and leaks, the river also receives pollution from factories, wastewater treatment plants, agricultural runoff, logging, industrial sites, and city streets. Thousands of pipes release pollution into the river and its tributaries daily.
The Columbia River is a vital resource for the Pacific Northwest, and the health of the river is crucial for the region's economy and ecology. However, the river has been severely impacted by pollution, with high temperatures and toxic contamination threatening the survival of salmon and other species. The river's temperature is impacted by dams, which can restrict water flow and cause warming. Warm water encourages the growth of harmful bacteria and fungi, posing risks to migrating fish.
Efforts are being made to address the pollution and protect the river's health. The Estuary Partnership is working with members of Congress and regional partners to secure legislation for funding actions to reduce toxic contamination. The EPA has also designated the Upper Columbia River as a Superfund National Priority to address metals contamination and protect public health. Additionally, the Port of Vancouver, Washington, treats up to 99% of its stormwater before it reaches the Columbia River, and both Oregon and Washington have successful pesticide collection programs.
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Frequently asked questions
The Columbia River is a lifeline of the Northwest, collecting water from a massive basin of 259,000 square miles across seven states and one Canadian province. It is the lifeblood of the Pacific Northwest and is of great cultural, economic, and spiritual importance to the region.
Yes, the Columbia River is polluted. Sources of pollution include factories, wastewater treatment plants, agricultural runoff, logging, industrial sites, city streets, and toxic waste from mining companies. The river also has high temperatures, which can harm salmon.
Efforts are being made to reduce toxic pollution and protect the people and wildlife in the Basin. The EPA has added the Upper Columbia River site to its Superfund National Priorities List to address metal contamination. The Estuary Partnership is working with members of Congress to secure legislation for funding to reduce toxic contamination. Additionally, Oregon and Washington have successful pesticide collection programs, and the Port of Vancouver treats up to 99% of its stormwater before it reaches the river.
