Bronte Wells
Puget Sound, the second-largest marine estuary in the United States, has been a source of sustenance for indigenous people for thousands of years. However, the activities of the 4.4 million people living in the surrounding area, such as population growth, urbanization, and industrialization, have put a strain on the Sound. Puget Sound is facing pollution from various sources, including oil spills, industrial waste, sewage, stormwater runoff, and marine debris. This pollution has contaminated the food web, endangering species such as Chinook salmon and orca whales and impacting the health and behavior of wildlife. While efforts are being made to address the issue, the Washington Department of Ecology has been criticized for its lack of regulatory action.
| Characteristics | Values |
|---|---|
| Population | 4.4 million |
| Population growth since 1960 | More than doubled |
| Percentage of Washington State's population living in the region | 67% |
| Estimated population by 2020 | 5.1 million |
| Percentage of shoreline reinforced by artificial structures | 30% |
| Number of streams, rivers and lakes in the basin impaired by poor water quality in 2008 | 549 |
| Toxic chemicals received by Puget Sound every year | Millions of pounds |
| Toxic chemicals received by Puget Sound every year from stormwater runoff | 75% |
| Toxic chemicals received by Puget Sound every year from surface runoff, groundwater discharges, and municipal and wastewater outfall pipes | Millions of pounds |
| Toxic chemicals received by Puget Sound every year from oil spills | Over 20 billion gallons |
| Types of toxic chemicals received by Puget Sound | Oil and grease, PCBs, phthalates, copper, lead, zinc, pesticides, pharmaceuticals, personal care products, birth control hormones, antibiotics, antidepressants, painkillers, laundry chemicals, arsenic, cadmium, mercury, fossil fuels, plastics, nonylphenol, triclopyr |
| Sources of pollution | City sewage, stormwater, logging, farming, industrial dumping, marine debris, small releases of toxic chemicals from everyday products |
| Priority toxic chemicals | Metals |
| Number of sewage treatment plants discharging at current levels | 58 |
| Species affected by toxic pollution | Chinook salmon, orca whales, other species of fish and wildlife |
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What You'll Learn
Stormwater runoff
The Puget Sound drainage basin encompasses 8,768,000 acres, of which 357,840 acres are made up of impervious surfaces. This represents an increase from 3.7% of the total basin in 1996 to 4.1% in 2006. The amount of impervious surface in a watershed is critical: coverage of approximately 10% typically leads to measurable and often irreversible loss of functioning of aquatic systems.
The impact of stormwater runoff on Puget Sound is significant. It degrades habitats, affects aquatic environments, and contributes to flooding. It is considered by the Washington State Department of Ecology to be the biggest water pollution problem in the urban areas of Washington State. Studies have shown that the pollutants in stormwater runoff can kill coho salmon in as little as three hours.
The Puget Soundkeeper Alliance works to address the issue of stormwater runoff by creating policies, enforcing pollution permits, and educating the public about best practices to reduce stormwater pollution. They have also challenged highway stormwater permits, pushing for retrofits that would reduce polluted runoff, and advocated for low-impact development to be required by the Department of Ecology's municipal stormwater permits.
Individuals can also play a role in mitigating the problem of stormwater runoff. Many of the contaminants that wash into Puget Sound come from everyday activities, such as using lawn fertilizer, not properly disposing of pet waste, and using chemicals, pharmaceuticals, and cosmetics that end up in the water supply. By being mindful of these sources of pollution and making small changes, individuals can help reduce the amount of polluted stormwater runoff entering Puget Sound.
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Industrial pollution
Puget Sound, the second-largest marine estuary in the United States, is currently facing a pollution crisis. The estuary, which has been a source of sustenance for indigenous people for thousands of years, has seen its natural resources exploited since the arrival of Europeans. Today, the region is under threat from various sources of pollution, including industrial pollution.
One of the primary concerns regarding industrial pollution in Puget Sound is the impact on the food web and the harm caused to species such as Chinook salmon, orca whales, and other wildlife. The toxins released by industries impair the reproductive abilities, energy levels, and disease-fighting capabilities of these species. Additionally, the presence of pharmaceuticals and personal care products in the water further exacerbates the problem, as these substances are not effectively regulated or treated in sewage systems.
The Washington Department of Ecology, responsible for controlling pollution, has been criticized for its lack of regulatory action. Despite efforts from organizations like NW Environmental Advocates (NWEA) to reduce toxic levels and protect aquatic species, Washington has been accused of a "business-as-usual" approach, allowing sewage treatment plants to continue discharging pollutants.
To address industrial pollution in Puget Sound, a multi-faceted approach is necessary. This includes preventing the use of toxic materials, implementing source control planning, and conducting research to identify the sources and impacts of chemicals. Additionally, stronger regulations and enforcement of pollution permits are crucial to holding industries accountable for their discharges into public waters. By combining these strategies, there is a higher chance of mitigating the effects of industrial pollution on the ecosystem and the organisms that depend on it.
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Marine debris
The Puget Sound region also faces pollution from stormwater runoff, which carries toxic chemicals from residential, commercial, and agricultural areas into the waterways. These toxic chemicals include copper, zinc, mercury, and polychlorinated biphenyls (PCBs). PCBs have been detected in fish species and orcas, with studies finding tumors in bottom-dwelling fish near the Duwamish River in the 1970s and 1980s.
Other sources of marine debris in Puget Sound include alien species that attach to and are transported by drifting litter, and the accumulation of plastics that can smother benthic organisms. More than 260 unique species have been found entangled in discarded fishing gear in the region.
Volunteer efforts play a crucial role in addressing marine debris in Puget Sound. The Puget Soundkeeper Alliance hosts regular cleanups and provides tools and direction to volunteers interested in cleaning up beaches. The organization also conducts microplastic monitoring and advocates for policy solutions to reduce plastic pollution. Additionally, the Puget Sound Ecosystem Monitoring Program and other researchers are actively studying toxic contaminants and their impacts on the region's wildlife and habitats.
Addressing marine debris in Puget Sound is a complex task due to the diverse sources of pollution and the potential harm to human and wildlife health. Increased funding has been allocated for the cleanup of abandoned vessels and the removal of related pollutants, demonstrating a commitment to improving the health of the ecosystem.
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Sewage treatment
Puget Sound is a source of sustenance for the indigenous people and is also home to wildlife such as orca whales, salmon, and Dungeness crab. However, the region is facing environmental decay due to pollution, with wastewater pollution being a major source of contamination.
The sewage treatment process involves collecting wastewater from domestic, industrial, and commercial sources and treating it to remove contaminants before discharging it back into waterways. The main goal of sewage treatment is to remove physical, chemical, and biological contaminants from wastewater to protect human health, the environment, and aquatic life. Here is a step-by-step breakdown of the typical sewage treatment process:
- Pretreatment: Before the sewage reaches the treatment plant, it undergoes pretreatment at the source. Industrial operations, for example, are required to eliminate certain contaminants through a pretreatment agreement before discharging their wastewater into the sewer system.
- Primary Treatment: In the primary treatment stage, the sewage undergoes mechanical treatment to remove large solid materials through screening and sedimentation. This process removes physical contaminants such as plastics, debris, and other solid materials.
- Secondary Treatment: The secondary treatment stage focuses on biological treatment, where microorganisms break down organic matter in the sewage. This process helps remove dissolved biological contaminants and nutrients.
- Tertiary Treatment: Tertiary treatment, also known as advanced or tertiary filtration, is an optional step that provides additional treatment to further improve water quality. It may include processes such as filtration, disinfection, and nutrient removal.
- Disinfection: After tertiary treatment, the treated water may undergo disinfection to eliminate any remaining harmful microorganisms. This step ensures that the water is safe for discharge into the environment or for reuse.
- Sludge Treatment: The sludge, or solid waste, that accumulates during the treatment process is treated separately through processes such as digestion, dewatering, and drying. The treated sludge can then be disposed of or reused in a safe and environmentally friendly manner.
Challenges and Improvements
The Puget Sound region is facing several challenges in terms of sewage treatment:
- Outdated Technology: Environmentalists have criticized the use of outdated technology in sewage treatment plants, which has led to the dumping of untreated waste and nutrients, such as nitrogen, into the waterways.
- Population Growth: The increasing population in the Puget Sound region has put immense pressure on the wastewater treatment systems, leading to overflows and inadequate treatment.
- Industrial Contamination: Industrial wastewater often contains heavy metals, chemicals, and petroleum products that municipal sewage treatment facilities are not equipped to handle effectively.
- Climate Change: Climate change and rising temperatures impact oxygen levels in the water, exacerbating the effects of excess nutrients from sewage.
To address these challenges, improvements in sewage treatment infrastructure and regulations are necessary. This includes investing in modern technology, upgrading treatment plants, and enforcing stricter permit requirements for industrial operations and treatment facilities. Additionally, promoting sustainable practices, reducing the use of toxic materials, and advocating for environmental protection can help mitigate the impact of sewage treatment on Puget Sound.
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Population growth
The expanding population has led to increased urbanization and development along the shoreline, altering natural habitats and introducing artificial structures. This urbanization brings with it various environmental implications, including pollution runoff and the altering of important shorelines. The expansion of companies like Microsoft and Boeing has spurred economic growth in the area, but it has also contributed to the pollution problem.
As the population grows, the demand for resources and infrastructure increases. This can lead to more pollution from various sources, such as failing septic systems, industrial activities, and agricultural practices. Population growth has also resulted in increased sewage pollution, with outdated sewage treatment plants struggling to keep up with the rising demand and often failing to adequately treat wastewater before discharging it into Puget Sound.
Moreover, population growth has intensified the problem of stormwater runoff. With more people living in the region, the amount of stormwater, which can contain contaminants like oil, grease, and toxic metals, has increased significantly. This runoff enters Puget Sound, carrying with it a toxic mix of pollutants that harm the delicate ecosystem and the species that inhabit it.
Additionally, population growth has contributed to increased pollution from everyday activities. As the number of people in the region grows, there is a corresponding rise in the use of personal care products, pharmaceuticals, and consumer goods. These products can contain chemicals and pollutants that eventually make their way into the water system, either through intentional disposal or accidental contamination.
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Frequently asked questions
Yes, Puget Sound is polluted. The Sound is affected by various sources of pollution, from oil spills to pharmaceuticals in the waterways.
The pollution in Puget Sound is caused by the everyday activities of the 4.4 million people who live on or around the nation's second-largest marine estuary. Population growth, urbanization, and industrialization have all contributed to the increase in pollution.
Efforts are being made to identify priority toxic chemicals and develop plans to reduce or eliminate their use or mitigate their impacts. The Environmental Protection Agency has made nonpoint source pollution a priority, and organizations like the Puget Soundkeeper Alliance are working to address issues related to polluted stormwater runoff and marine debris.
