Greta Jimenez
The Spokane River in Washington is a complex system that flows through the populated Spokane metropolitan area and is home to many species of fish and other aquatic animals. However, the river has faced issues with pollution, primarily from PCBs, PFAS, PBDEs, and other toxic chemicals. PCBs, or polychlorinated biphenyls, have been found in fish tissue, leading to health advisories from the Washington Department of Health regarding fish consumption. PFAS, or per- and polyfluoralkyl substances, have been detected in the river downstream of the city's water treatment plant, although at lower levels than in other parts of the country. PBDEs, or polybrominated diphenyl ethers, are chemical additives used in household products, and were found in fish in the Spokane River at the highest levels sampled in Washington State. The presence of these and other pollutants has led to efforts to improve water quality and reduce pollution in the Spokane River.
| Characteristics | Values |
|---|---|
| PCBs in fish | Yes |
| Health advisory for eating Spokane River fish | Issued |
| Dissolved oxygen water improvement plan | Completed in 2007 |
| EPA PCB water improvement plan | Completed in 2024 |
| PCB implementation plan | In development |
| PFAS | Present |
| Per- and polyfluoralkyl substances | Present |
| Toxic chemicals | Present |
| Metals | Present |
| Stormwater runoff | Present |
| Wastewater | Present |
| Pollution sources | Point and nonpoint |
| PCB water quality standard | 1.3 pg/L |
Explore related products
![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)
What You'll Learn
PCBs in Spokane River fish
The Spokane River in Washington has been affected by pollution from various toxic chemicals and heavy metals, including PCBs. PCBs, or Polychlorinated biphenyls, are toxic, man-made chemicals that were historically used in coolants and lubricants for electrical equipment. They were banned in the United States in 1979 due to evidence of human toxicity, but they persist in the environment and have been found in the Spokane River.
PCBs have been detected in the river's groundwater, sediment, and fish tissue. The presence of PCBs in Spokane River fish is a significant concern as they can accumulate in the food chain, leading to increasing amounts in fish and the animals that eat them. The U.S. Environmental Protection Agency (EPA) lists PCBs as probable carcinogens and has identified several adverse health effects associated with exposure, including skin rashes, immune deficiencies, liver disease, reproductive disorders, and neurological and behavioral problems.
In response to the contamination, the Washington Department of Health has issued advisories and placed limits on the consumption of fish from the Spokane River. They recommend that residents consume no more than one fish per month from certain sections of the river and none at all from other stretches. These restrictions have had a significant impact on the traditional diet of the Spokane Tribe, who once consumed up to two pounds of fish per day.
Efforts are being made to reduce PCB pollution in the Spokane River. The city of Spokane has adopted an Integrated Clean Water Plan to manage stormwater and wastewater, and is investing in upgrades to stormwater and sewer treatment systems. The EPA has also developed Total Maximum Daily Loads (TMDLs) for PCBs in the Spokane and Little Spokane Rivers to restore water quality and determine allowable pollutant levels. Additionally, cleanup methods such as capping and removing contaminated sediments have been implemented in certain areas of the river.
Despite these efforts, the long history of PCB use in the region and the presence of PCBs in manufactured products make it challenging to meet the stringent PCB pollution regulations in place. The Spokane River Toxics Advisory Committee is working to develop a PCB implementation plan, and conservation and environmental groups are collaborating with landowners to reduce runoff from forestry and agriculture practices.
Bromomethane: A Marine Pollutant?
You may want to see also
Explore related products
Sources of pollution
The Spokane River and its tributaries flow westward from their source at the outlet of Lake Coeur d'Alene in Idaho. The river drains an area of about 6,640 square miles, with approximately one-third in Washington and the rest in Idaho. The river's water quality has been a concern due to the presence of various pollutants, including PCBs, PBDEs, dioxins/furans, lead, arsenic, cadmium, zinc, and PFAS. These pollutants have impacted the river's aquatic life and the health of humans who consume fish from the river.
PCBs (polychlorinated biphenyls) are a significant source of contamination in the Spokane River. They were widely used by industries for equipment lubrication and cooling until they were banned in 1979. However, PCBs persist in the environment and can accumulate in fish and other aquatic organisms. The Washington Department of Health has issued advisories and restrictions on consuming fish from the Spokane River due to PCB contamination. Efforts are being made to reduce PCB levels in the river, including implementing improvement plans and working with landowners to reduce runoff from forestry and agriculture practices.
PBDEs (polybrominated diphenyl ethers), commonly used as flame retardants in household products, have also been detected in the Spokane River. While specific pathways are not yet known, PBDEs can enter the river through air, soil, and water. Lab tests have linked PBDEs to adverse effects on brain development, memory, behaviour, and thyroid function in animals, with potential similar consequences for humans if exposure levels continue to increase.
Dioxins/furans, released into the environment through various industrial processes, have also been detected in the Spokane River. They are probable human carcinogens and can cause neurological, immune, and reproductive issues. Limited data is available on their presence in the river, and there are currently no state or federal standards to determine safe levels in fish for human consumption.
Lead, arsenic, cadmium, and zinc are additional contaminants found in the Spokane River, resulting from mining, milling, and ore processing activities. These metals can be toxic to aquatic life and accumulate in the river system.
PFAS (per- and polyfluoralkyl substances) have been detected downstream of Spokane's water treatment plant, although at lower levels compared to other waterways. These chemicals were once common in consumer products like Teflon and Scotchgard, and their presence in the river is a concern. The city of Spokane is investing in upgrades to stormwater and sewer treatment systems to reduce the entry of PCBs and other toxins into the river.
Noise Pollution: What to Embrace and Avoid
You may want to see also
Explore related products
Reducing PCB levels
The Spokane River in Washington State has a history of PCB pollution, which has contaminated the river's fish and affected human and animal health. PCBs are a group of man-made chemicals that were used in electrical equipment and have been linked to various health issues, including liver problems, skin issues, reproductive disorders, and cancer.
To reduce PCB levels in the Spokane River, several measures have been implemented:
Wastewater Infrastructure and Treatment Technology:
The city of Spokane is investing $340 million in upgrading stormwater and sewer treatment systems to prevent PCBs and other toxins from entering the river. This includes implementing the Integrated Clean Water Plan, which prioritizes projects for managing stormwater and wastewater.
Source Control and Reduction:
Conservation and environmental groups are working with landowners to reduce runoff from forestry and agriculture practices, as PCBs can enter water bodies through contaminated soil and runoff. The Spokane County's Nonpoint Source Phosphorus Reduction Plan recommends actions to reduce these sources of pollution.
Filtration Systems:
Companies responsible for historical PCB pollution are now working to clean up the contaminated sites. For example, Kaiser Trentwood uses a filtration system that pumps water through tanks filled with ground-up walnut shells, capturing the PCBs. The PCBs are then washed from the shells and stored safely.
Sediment Capping and Removal:
In 2006, high concentrations of PCBs in sediments behind the Upriver Dam were capped with layers of coal, sand, and gravel to prevent their release into the river. In other areas, PCB-contaminated sediments were removed and replaced with clean sand.
Nature-Based Remediation:
Technologies like SedMite pellets, composed of activated carbon, are being used to prevent PCBs from collecting in small organisms at the bottom of the food chain. These carbon pellets can bind to the PCBs, reducing their bioavailability to aquatic life.
Regulatory Measures:
The EPA has set strict limits on PCB levels in Washington waterways, and industries are required to report spills or accidental releases. The Washington Department of Health has also issued advisories and recommendations to limit the consumption of fish from the Spokane River due to PCB contamination.
Understanding Nouns: Pollution as a Concept
You may want to see also
Explore related products
Other toxins in the river
The Spokane River is contaminated with various toxins, including PCBs, PFAS, and heavy metals. PCBs, or polychlorinated biphenyls, have been detected in the river's groundwater and fish tissue, leading to health advisories against consuming fish from the river. The Washington Department of Health has set restrictions on fish consumption due to the potential health risks associated with PCBs, which include skin rashes, immune deficiencies, liver disease, reproductive disorders, and neurological problems. They are also listed as probable human carcinogens by the U.S. Environmental Protection Agency.
The city of Spokane is investing significant resources into improving wastewater infrastructure and treatment technology to reduce PCB pollution. However, the long history of PCB use in the region and the previous lax standards for PCBs in manufactured products make it challenging to meet the new stringent pollution standards. The EPA has established Total Maximum Daily Loads (TMDLs) or "pollution budgets" to reduce PCB levels in the river and protect human health.
PFAS (per- and polyfluoralkyl substances) have also been detected in the Spokane River, although at lower levels compared to other waterways across the United States. PFAS are found in discontinued versions of common consumer products, such as Teflon and Scotchgard, as well as in firefighting foam. While the levels in the Spokane River are not alarming, it highlights the widespread presence of these harmful chemicals in surface water. The city of Spokane is working to address PFAS contamination and improve filtration techniques to remove these pollutants from the water.
Heavy metals, including lead, arsenic, cadmium, and zinc, have been released into the river system from mining, milling, and ore processing activities. These metals can be toxic and have the potential to accumulate in aquatic organisms, leading to health risks for humans who consume them. The Urban Waters Initiative is investigating cleanup options to address heavy metal contamination in the river.
Additionally, Polybrominated diphenyl ethers (PBDEs), which are flame retardants used in household products, have been detected in fish in the Spokane River. While specific pathways to the river are unknown, PBDEs can enter the air, soil, and water. Exposure to PBDEs has been linked to brain development issues and thyroid problems in animal studies, with potential similar effects on humans if exposure levels continue to increase.
Chiang Mai's Pollution Problem: Is the Air Safe?
You may want to see also
Explore related products
Spokane River cleanup efforts
The Spokane River in Washington has been heavily contaminated with PCBs, which have built up in the food chain, ending up in fish and other animals, as well as humans. The Washington Department of Health has issued a health advisory, warning residents to limit their consumption of fish from the Spokane River. PCBs are probable carcinogens and can cause a range of health issues, including skin rashes, immune deficiencies, liver disease, reproductive disorders, and neurological problems.
In response to this issue, the city of Spokane has adopted an Integrated Clean Water Plan to manage stormwater and wastewater. They are also investing $340 million in upgrades to stormwater and sewer treatment systems to reduce PCB and toxin levels in the river. The Washington Department of Ecology has updated water quality permits to ensure that wastewater treatment facilities discharging into the river meet clean water requirements, including strict limitations on pollutants like phosphorus and PCBs.
The Spokane River Regional Toxics Task Force was formed in 2012 to identify and reduce sources of PCBs in the river. The EPA has also established Total Maximum Daily Loads (TMDLs), or "pollution budgets", to reduce PCB levels in the Spokane and Little Spokane Rivers. The EPA's PCB water improvement plan, completed in 2024, aims to restore water quality by determining allowable pollutant levels.
The Spokane River Toxics Advisory Committee has been established to address and mitigate toxics in the Spokane River Watershed, with a focus on PCBs. Conservation and environmental groups are working with landowners to reduce runoff from forestry and agriculture practices, and the Urban Waters Initiative is investigating cleanup options for dioxins/furans, a group of toxic substances found in the river.
The Kaiser Trentwood aluminum plant is also working to clean up the aquifer it once polluted. Water is drawn up and filtered through tanks filled with ground-up walnut shells, which absorb the PCBs. While the city of Spokane and other dischargers are making efforts to clean up the river, it is acknowledged that it will take a long time to see significant results.
Himalayas: Polluted by Leftover Waste
You may want to see also
Frequently asked questions
Yes, the Spokane River is polluted with PCBs, PBDEs, dioxins/furans, lead, arsenic, cadmium, zinc, and PFAS.
PCBs, or polychlorinated biphenyls, are probable carcinogens that impact hormone regulation and childhood development. They were banned in 1979 but remain in the river due to their historical use in equipment like electrical transformers.
The EPA has established Total Maximum Daily Loads (TMDLs) or "pollution budgets" to reduce PCB levels in the Spokane and Little Spokane Rivers. The city of Spokane is also investing $340 million in upgrades to stormwater and sewer treatment systems to reduce PCB levels.
PFAS, or per- and polyfluoralkyl substances, are a family of harmful chemicals found in firefighting foam and discontinued consumer products like Teflon and Scotchgard.
Yes, due to the presence of PCBs and other toxins in Spokane River fish, the Washington Department of Health recommends that residents limit their consumption of fish from the river.
