Water Quality: Natural Filtration Systems, Their Impact, and Tribal Connections

Introduction

Water quality is often at the center of environmental discussions — but how well do we truly understand what it means and encompasses?

One of the first things that often comes to mind when people consider water quality is the presence of chemicals or pollutants. Mechanical filtration systems are widely used nowadays to purify and clarify water as efficiently as possible. There are also many natural solutions for improving water quality and purification that are self-sustaining and require no artificial instruments or intervention. Wetlands, shellfish, aquatic vegetation, and a wide array of organisms have long worked together in balanced cycles to maintain water clarity and ecosystem health. These natural filtration systems are not only self-sustaining but also essential to the long-term resilience of aquatic environments.

Among the many species that support ecological balance, the American eel is often recognized as a key contributor to this natural process. However, regardless of historical perspectives, it has actually been a misconception that eels in waterways are among nature’s water purifiers. While it is true that eels indirectly help keep the water clear, the actual organisms that can filter the water are the mussel larvae that the eels carry on their gills. Once these mussel larvae reach maturity, they can filter feed and clarify the water by absorbing various particulates floating in the water.

While the presence of mussels once sufficed to preserve waterway quality, modern interventions such as pollution and industrial expansion have overwhelmed natural filtration systems, leading to poorer water quality. It is important that waterways are preserved and the human-imposed threats to them are limited, as rivers, lakes, and bays play vital roles—not only in supporting biodiversity, but also in sustaining livelihoods through fishing and providing spaces for cultural and community practices tied to the water. In areas with multiple large bodies of water and aquatic ecosystems, such as the Hampton Roads region, maintaining high water quality is essential for public health, economic stability, and environmental sustainability.

In the Hampton Roads area, seafood is a major industry, both commercially and recreationally. Specifically in the Potomac River, food caught in local waterways has been a source of nourishment since indigenous people inhabited the lands. With current threats to water quality in this area, seafood is becoming increasingly unsafe to consume, causing harm to both the fish species in the contaminated waterways and the organisms that eat them.

Historically, the Potomac, or Patowomeck, Tribe has utilized the Potomac River and the natural resources within and around it. Alongside consuming the abundant seafood in the river, the Potomac Tribe would use the dense eel population for tribal traditions and to achieve economic independence from the incoming colonists. One of the most notable traditions of the Potomac Tribe is the making of eel baskets to catch eels from the river.

The eel baskets are intricately woven with native and natural materials and used to capture eels from the water, which were then sold for commercial use or consumption. Today, this tradition is still practiced by the Potomac Tribe.

While there are many threats to the Potomac River and those who rely on it, it is not too late to slow the damage to the river and other local waterways. By reducing the use of modern practices that harm the quality of natural waterways and increasing conservation efforts to restore the natural balance of aquatic ecosystems, the damage to these waterways can be slowly reversed. Much like the Potomac tribe, we can responsibly use the river's natural resources to ensure the longevity of the environment and the sentimental traditions associated with it.‌

The water quality of different bodies of water—such as lakes, streams, and rivers—depends on a variety of natural organisms and processes that work together in a cycle to purify water, reflecting how nature sustained clean water systems in pre- and post-colonial times. These natural purification processes, along with the historical presence of eels, stewardship by the Potomac tribe, and modern conservation efforts, all contribute to restoring the delicate balance once maintained by nature alone.

The Myth of the Eels

It has been a historically popular belief that the eels themselves possess the necessary qualities to filter the water and improve its quality (Safe H2O). This belief most likely resulted from a correlation between a high number of eels present in a body of water and the body of water having more clarity and quality; however, correlation does not always signify a direct causation. Eels do not have the necessary anatomy to take in dirty water, filter it, and return it to the water and environment in a clean state (Safe H2O). However, eels do contribute to the purity and quality of the water through their relationship with mussels. Mussel larvae will attach to the gills of eels and use them as a form of larvae nursery and mode of transportation until the mussels are mature enough to survive on their own (Stirr, 2024). Once the mussels have fully developed, they serve as filter feeders and, thus, improve the water quality around them. Because of this symbiotic relationship, a larger eel population often correlates with a higher mussel population in an environment; therefore, in an almost roundabout way, it can be said that a larger quantity of eels in an environment could be an indicator of higher water quality. This, of course, does not affirm the nature of the myth, but rather provides a rationale for its existence.

Mussels are highly efficient filter feeders, and when present in large enough numbers, they can significantly improve water quality. Possessing the anatomy needed to filter out sediment and pollutants from the water they inhabit, mussels can serve as a natural water quality regulator. They do this by taking in contaminated or particulate-heavy water through their inhalant siphon, passing it through the gills, and then expelling it through the exhalant siphon (Leskiw, 2023).

The mussel siphons are a part of their anatomy that allows them to take in and release water from their surrounding environment. The inhalant siphon, labeled 6 in Figure 1, draws in muddy or contaminated water from the environment. In contrast, the exhalant siphon, labeled 5 in Figure 1, returns the filtered water to the environment. The siphons are located near the rear of the mussel and have more purposes beyond just filtration and feeding. The siphons also aid reproductive processes by creating a current that carries sperm and larvae away. These currents also carry away the waste produced by the mussel (Helfrich, 2020).

Mussels possess gills, labeled 3 and 4 in Figure 1, that carry out the main processes of filtration. As water is filtered through the gills, the mussel pulls in food, which can include sediments, pollutants, plankton, bacteria, and detritus (dead organic matter and debris). The mussel taking in these particulates and consuming them decreases the number of particulates left in the water, thereby reducing water contamination (Helfrich, 2020), thus playing a major role in the natural water filtration process (Helfrich, 2020).

Water Quality

Water quality refers to the physical, chemical, and biological characteristics of water that determine whether it is suitable for a specific intended use. High-quality water is essential for both surrounding communities and ecosystems to thrive.

Importance of Water Quality

As mentioned previously, water quality is important because it determines whether a body of water can safely support a particular use. Different uses require different standards — for example, water used for drinking must meet much stricter quality thresholds than water used for boating or wildlife habitat. Common uses of waterways include human consumption, recreational activities like swimming or fishing, and supporting the health of aquatic ecosystems (EPA, 2025a).

Water plays a crucial role in human health and hygiene. To even survive, humans need ready and consistent access to large amounts of clean drinking water. On average, about 82 gallons of water are used per person daily, which is almost 30,000 gallons per year — enough to fill a large rectangular swimming pool (EPA, 2025g; Gilbert Pool Service). Water is used for hydration, cooking, growing food, hygiene purposes, and many other essential parts of our daily lives. If contaminated water is used for any of these purposes — including growing crops, where pathogens like E. coli can be absorbed by the produce — it can lead to serious health consequences.

Furthermore, if humans directly or indirectly consume this poor-quality, contaminated water, it can cause infectious diseases, chronic conditions, or even short-term discomfort, such as gastrointestinal disorders, among many other ailments. Gastrointestinal issues caused by consuming poor- quality water can include stomach pain, diarrhea, nausea, and vomiting and may become chronic with prolonged exposure (CDC, 2022). Some infectious diseases that can result from unsafe water include cholera, dysentery, and hepatitis A (World Health Organization, 2023). There are also serious long- term health issues that can occur after prolonged exposure to contaminated water, such as cancer and neurological disorders.

Another way humans utilize clean bodies of water is for recreational activities, such as swimming, fishing, and boating. These activities must be performed in clean waterways because contaminants in the water could enter a person's body through the skin, nose, mouth, eyes, ears, and other areas that can take in water or absorb liquids or other particulates (EPA, 2025f). If contaminated water enters a person's system through the aforementioned methods, it can pose many health risks, including those posed by harmful amoebas. The most well- known example of a dangerous amoeba found in waterways is the Naegleria fowleri, which can enter a person's system through their nose and eat away at their brain, almost always resulting in a fatality (CDC, 2025c). Two other common species of amoebas found in waterways are Acanthamoeba and Balamuthia mandrillaris, both of which can cause infections in humans upon exposure through cuts in the skin or inhalation (CDC, 2025a; CDC, 2025b).

Like humans, ecosystems rely on clean water to remain healthy and thriving. Contaminated water may contain chemicals and pollutants that are harmful or toxic to the aquatic species inhabiting the area. These toxins cannot only harm and kill fish but may also hinder the reproductive abilities of fish and other organisms. Aquatic organisms also rely on certain resources in the water to survive, so when these resources decline or disappear due to contaminants in the water, the organisms depending on them will either die off or relocate to somewhere with a higher abundance. These resources include essential elements, such as dissolved oxygen, and key life-sustaining nutrients, such as nitrogen and phosphorus, which must be present in adequate quantities to support aquatic life. (EPA, 2025a).

Physical Qualities

Physical properties are the properties that can be observed or measured without having to change the state of or cause a reaction with what's being observed. In terms of water quality specifically, this includes characteristics such as temperature, color, and turbidity (University of Georgia).

The temperature is a measure of how hot or cold the water is. This can be useful in determining water quality because the temperature of the water affects how much oxygen it contains, how fast chemical reactions occur in it, and the number of microorganisms living in it. In warmer water, there is a lower content of dissolved oxygen, faster and more frequent chemical reactions, and a higher number of microorganisms and bacteria (Atlas Scientific; Preciado, Boxall, Soria-Carrasco, Martinez, Douterelo, 2021).

The color of water can also be a physical indicator of its quality. Different colors of water often indicate the presence of substances and contaminants. Clear or blue water typically contains low levels of substances (EPA, 2025d). A brown or yellow body of water may contain organic matter, such as humus (a dark layer of soil formed from decomposed remains) or decaying plant matter, which are naturally occurring substances and not necessarily a huge cause for concern (Temnerud, 2002). Green water can indicate a high concentration of algae and phytoplankton that can be an indicator of an absence of oxygen in an area of the water, while reddish water can be a cause for concern as it most likely contains a certain type of algae called dinoflagellates, which are the species present in a red tide. A red tide is when tidal areas of water appear red due to a dense presence of harmful algal blooms and can cause harm to the other organisms in it (Aquarium of the Pacific). Reddish-brown water can indicate the presence of iron particles or high levels of dissolved organic matter, and black water often contains a high density of decaying remains from organisms that once lived in or near the water (USGS, 2022; Xue, 2012). Both reddish-brown water and black water are indicators of very poor quality and should not be used for human use or consumption.

Turbidity of a body of water can also offer valuable insight into its quality. Turbidity is a physical measurement of suspended solids and clarity in water. If a body of water is very cloudy, that means it has a high turbidity, which indicates that the quality of the water may be lowered due to particles in the water, such as soil, silt, algae, and various microorganisms (USGS Water Science School, 2018). Depending on the substance causing the turbidity levels, there are varying levels of how much of a threat it is. For example, if a highly turbid body of water is the result of pollutants in the water, then this would indicate that the water is unsafe.

However, if the substance causing the turbidity is just cloudiness from mobile sediment, then the concern of poor water quality is significantly lower.

Chemical Qualities

A chemical property determines how a substance interacts with other substances or compounds and how it can even alter another substance. Water has many chemical properties that indicate its quality. The most common chemical indicators of water quality are pH, dissolved oxygen content, the presence of pollutants, the presence of metals, and the presence of nitrogen and phosphorus in the water (World Health Organization, 2022).

The pH of water can be a useful indicator of the quality because it measures acidity, which can further indicate the presence of pollutants or other chemicals (Enviroliteracy Team, 2025). A simple way for people to test the chemical quality of water themselves is with a store-bought testing kit, such as the one shown in Figure 4, available at most hardware stores.

Dissolved oxygen in water is essential for aquatic life to survive and flourish. High levels of dissolved oxygen can indicate a healthy aquatic ecosystem with thriving fish and organisms, also often indicating good water quality. In a similar sense, water with low dissolved oxygen content will have less prosperous ecosystems and often indicates pollution, contamination, and poor water quality (EPA, 2025c). This is because the presence of pollutants and the chemical interactions of the pollutants with other compounds and organic life in the water can lead to lower amounts of dissolved oxygen.

The presence of pollutants and metals in waterways is often a strong indicator of poor water quality.

These substances typically degrade water quality, frequently leading to toxic or contaminated conditions. Elevated levels of certain chemicals in waterways can especially have widespread and catastrophic effects on aquatic ecosystems, leading to the death of entire fish populations and, in select cases, harming the animals and humans that consume the fish. Two notable chemical pollutants are phosphorus and nitrogen. Many farms use fertilizers that contain both nitrogen and phosphorus to support crop growth and yield; however, when these chemicals dissolve in water and mix with other compounds, they also accelerate the growth of algal blooms in water bodies. This is a biological process that, when occurring in excess, can significantly damage water quality and the ecosystems within it (Adams, 2020). These compounds and chemicals are inevitably transported to various waterways via runoff, the process by which rainwater picks up sediments and contaminants and carries them to a lower point by gravity, most often a waterway such as a lake, river, or stream.

Another type of chemical pollution in waterways is biomagnification, which is when contaminants in the waterways are found in low amounts in smaller aquatic organisms. However, as larger animals and fish consume smaller organisms, the concentration of contaminants increases higher up the food chain (NOAA). The two most common types of biomagnification contamination found in waterways are mercury and Dichloro-Diphenyl-Trichloroethane (DDT), both of which can be very harmful to humans if consumed (Bio Explorer, 2025).

Biological Qualities

The biological makeup of a body of water can be described by the living organisms present in it.

Biological properties, such as the presence of algae, bacteria, and other microorganisms, can indicate varying water quality.

A large presence of algal blooms, similar to those shown in Figure 5, can both indicate and cause poor water quality. Algae growth begins to increase exponentially when there are large amounts of nitrogen and phosphorus in the water from agricultural runoff. Both chemicals can be categorized as nutrient pollution, making the water less safe to consume and even unsuitable for habitation. Algal blooms can harm aquatic environments by blocking sunlight from reaching the water below, absorbing dissolved oxygen, and, in some cases, releasing harmful toxins, such as cyanobacteria (also known as blue-green algae).‌

This can create dead zones in the water where fish and other organisms can't survive or are harmful to anyone who consumes them (EPA, 2025h). It can be unsafe to eat fish caught in algae-ridden waters, as the fish that survive the toxins long enough to be caught can pass the harmful effects to any animal or human that consumes them (Surrick, 2024).

A high concentration of bacteria or other microorganisms is also often an indicator of poor water quality. This is because these microorganisms are typically found in sewage, animal waste, and decaying matter. Some of the bacteria from these sources can carry potent, extremely harmful diseases that can spread to humans and animals. The presence of these waste-associated and harmful bacteria in the water renders it unsafe for human consumption and indicates poor water quality. (Minnesota Department of Health, 2024). A specific example of one of these harmful types of bacteria is E. coli. E. coli is often a result of fecal contamination and can cause a person to fall ill if infected with the bacteria. The symptoms of an E. coli-induced illness often include gastrointestinal symptoms such as vomiting and diarrhea (EPA, 2025b).

Environmental Factors

Numerous environmental factors can either degrade or enhance the quality of a water body. These factors may arise from a range of natural processes and human activities.

Common natural processes that affect water quality include erosion, runoff, and decomposition. Erosion and runoff can be caused by rainwater or flooding, picking up sediment and various compounds and carrying them into waterways. Erosion, also known as weathering, occurs naturally when flowing water wears away the stability of rocks, soil, or sediment and moves it to a different place. Both erosion and runoff can lower water quality by depositing foreign materials in waterways, some of which are toxic pollutants or contaminants that can harm organisms and aquatic life in those bodies of water. Lastly, decomposition occurs when organisms die and begin to break down physically, chemically, and biologically, ultimately decaying, with the compounds produced entering the environment.

Decomposition and decay of organisms can release byproducts, such as toxins and bacteria, that can harm aquatic organisms or make the water unsuitable for consumption (Boyd, 2017).

Understanding the specific environmental threats in local water bodies is essential to enabling communities to take informed, effective action to protect public health and the environment.

Hampton Roads Water Quality

The specific areas discussed in this paper are located within the Hampton Roads region of Virginia, so it is important to be cognizant of several key factors that significantly impact local water quality.

As the Hampton Roads region becomes more urbanized, urban runoff becomes a growing concern for the health of aquatic ecosystems. In most situations, when it rains in these developing urban landscapes, like the city of Norfolk, pictured in Figure 6, rainwater picks up any loose pollutants like fertilizers, pesticides, pet waste, oil, road-deposited sediments (RDS) from vehicles, and other similar polluting substances, and carries them to a larger body of water. In the more rural areas of the Hampton Roads region, runoff still poses a threat to waterways because excess farming chemicals, such as nitrogen and phosphorus, are picked up by flowing water and fed into larger waterways, causing contamination and algae growth (Hampton University).

Urbanization in this region of Virginia causes other forms of pollution that ultimately affect the quality of the water, either directly or indirectly, including air pollution, wastewater treatment, and industrial discharges (Lang, 2017).

Air pollution refers to emissions from factories, power plants, and vehicles that contain harmful contaminants, which can eventually be deposited into waterways through processes such as atmospheric deposition and rainwater runoff (Lang, 2017). This poses a threat to waterways because, through atmospheric deposition, the particulate matter from air pollution will eventually settle, often in areas that contain a body of water or where runoff will pick it up and carry it to a body of water. For example, diesel fumes released by vehicles contain particulate matter that can settle onto surfaces or directly into bodies of water (EPA, 2025e). Unlike gasoline emissions, which tend to disperse more readily into the atmosphere, diesel particulates are heavier and more adhesive, allowing them to stick to roads, soil, and other surfaces—making them more likely to be carried into waterways by runoff (Health Effects Institute, 2020).

Following the filtration and cleaning process, wastewater treatment facilities generate a substantial volume of waste discharge that still contains residual impurities, often discharged into nearby bodies of water. (EPA, 2024).

Industrial discharge is the waste byproduct created by industrial facilities during manufacturing processes. This industrial waste is discharged or eventually leaches into the environment, carrying pollutants such as heavy metals and harmful organic compounds (Lang, 2017). Eventually, these pollutants end up in bodies of water, where they greatly harm the quality of the water.

The Hampton Roads region is known for its large marine and fishing industry. This industry, however, contributes to the introduction of harmful pollutants into water through the transportation of goods by boat or similar marine activities. Excess fuel, oil, and waste from ships lead to increased contamination of waterways (NOAA).

Climate change is another prevalent issue that impacts the water quality and marine ecosystem health of Hampton Roads' waterways. As global temperatures rise, it creates an ideal environment for algal blooms to flourish. Climate change is also linked to changes in weather and increased rainfall, which can negatively affect waterway quality (Climate Central, 2025). This is because increased precipitation leads to an increase in runoff that can potentially carry pollutants and harmful compounds towards waterways. More rainfall can also trigger groundwater levels to rise, leading to septic system malfunctions or failures and, in turn, the release of pollutants commonly found in sewage and wastewater (Lusk, 2023).

Aside from the aforementioned water pollution factors, a fairly large amount of chemicals and pollutants still end up in waterways from other sources. One of these sources is disinfection byproducts, which occur when drinking water sanitation facilities release a large number of chemical byproducts into the environment and waterways. These chemical byproducts include trihalomethanes (TTHMs) and Haloacetic Acids (HAAs), both of which are harmful to waterways and harm water quality (EPA, 2016). Another common water pollutant in the Hampton Roads is PFAS, which is a group of manufactured chemicals that are difficult for the environment to break down. As such, PFAS are also referred to as "forever chemicals" because it is extremely difficult and complex to break them down into less harmful, more processable compounds. They are often found in nonstick pans, waterproof clothing, fast-food wrappers, and firefighting foam (Hornes, 2025).

In the Hampton Roads region, there are also a few pollutants that end up in the waterways that are naturally occurring and not due to human intervention. The most common substance of this type is radium, which occurs naturally in the soil and is therefore often found in the area's groundwater (Levine, 2014).

Seafood in the Potomac

Many waterways support diverse aquatic species, including the blue crabs shown in Figure 7, some of which are commonly consumed by humans. This section focuses on seafood specifically from the Potomac River, where declining water quality has raised serious concerns. Pollutants in the river are not only harming fish populations but also posing health risks to people who’ve consumed contaminated seafood. In some cases, these environmental stressors have led to noticeable declines in certain species, threatening both ecosystem balance and food safety.

How Seafood Quality Affects the Consumer

A range of contaminants can render seafood unfit for human consumption, with legacy pollutants being a significant threat to water quality in the Potomac River. Legacy pollutants are historical contaminants that have persisted over time and are found in various environmental settings. Additionally, these pollutants can be reintroduced into the Potomac River and other waterways through runoff at any time. Specific to the Potomac River, abandoned acid mine drainage is a major legacy pollutant that adversely impacts water quality and safety. When aquatic life absorbs or inadvertently consumes this drainage along with other legacy pollutants, it poses a risk to human health for individuals who consume this seafood (Kean, 2023).

There are additional significant contaminants in and around the Potomac River that contribute to its declining water quality. Similar to the previously mentioned acid mine drainage and other legacy pollutants, these contaminants threaten the safety and quality of the seafood harvested from the Potomac. These contaminants often accumulate in the tissues of various fish and aquatic organisms, resulting in potential harm to humans upon ingestion. Notable hazardous contaminants frequently detected in the tissues of Potomac River seafood include heavy metals, polychlorinated biphenyls (PCBs), and other similarly classified toxins (Potomac Conservancy, 2016).

Threats to Aquatic Life

Poor water quality and poor sanitation have resulted in several issues affecting aquatic populations in the Potomac River, ultimately leading to reduced reproductive and survival rates. The presence of sewage and agricultural runoff has contributed to an increase in endocrine-disrupting chemicals (EDCs) within the river. These endocrine disruptors disrupt the reproductive hormone systems of fish, leading to reduced reproductive abilities. Among the reproductive anomalies associated with these chemicals are reduced sperm counts and the occurrence of intersex fish. (Potomac Conservancy, 2016).

The elevated pollution levels in the Potomac River have resulted in decreased reproduction and survival rates among fish. The presence of heavily contaminated water significantly hampers a fish’s ability to survive and leads to various complications, including negative impacts on growth, reduced hatching numbers, and decreased respiration rates (which refer to the amount of oxygen absorbed and the amount of carbon dioxide expelled by an aquatic organism over a specified time period) (Chabot, McKenzie, Craig, 2016). As previously noted, certain water contaminants can stimulate excessive algal growth, which in turn depletes dissolved oxygen levels and creates conditions that can suffocate fish and other aquatic life (Potomac Conservancy, 2016).

Several native species in the Potomac River are experiencing severe consequences from water contamination. Among them, striped bass and smallmouth bass are the two most commonly found fish now considered unsafe to eat. Striped bass, in particular, are affected by legacy pollutants, with harmful toxins from the river’s industrial past still accumulating in their tissue—posing health risks to humans who consume them. Smallmouth bass have also suffered significantly due to water pollution, with exposure to endocrine-disrupting chemicals leading to reproductive issues and reduced survival rates. Although their population is beginning to recover, progress is slow, and the long-term effects of pollution remain a serious concern (Kean, 2023).‌

Consuming Seafood from the Potomac River

While the seafood in the Potomac River is contaminated with toxins, it's still possible to safely consume it if caught and prepared properly. Before even going out fishing in the Potomac River, it's important to check the DOEE website (https://doee.dc.gov/service/fishdc#:~:text=Fish%20 Consumption%20Advisory,Creek%2C%20within% 20the%20Distric%27s%20boundaries) for advisories regarding fish consumption in the Potomac River. During fishing activities, it is crucial to exercise caution and prioritize the retention of smaller, younger fish for consumption. These younger fish generally exhibit lower levels of contaminants and are likely less harmful than their older counterparts (DSHS).‌‌

After catching seafood—particularly fish—it is crucial to ensure it is properly prepared. Removing skin, fat, and internal organs from fish is essential before cooking to minimize consumers’ exposure to potentially harmful substances (Fish Contamination Education Collaborative). For illustration, the fish fillet depicted in Figure 8 displays a properly cleaned and prepared piece of fish.

Furthermore, when all fishing and preparation guidelines are adhered to, seafood sourced from the Potomac River can serve as a safe and healthy addition to meals—reflecting the long-standing tradition of river-based diets among the Indigenous tribes that once inhabited its banks. For these communities, the Potomac was more than just a source of sustenance; it played a central role in daily life, with fishing being integral to both nutrition and cultural identity.

The Potomac Tribe

The Potomac tribe is a group of indigenous peoples who have resided in the region along the Potomac River long before the arrival of European colonists in America. Presently, this tribe is situated in Stafford and King George counties and is recognized as the Patawomeck Indian Tribe of Virginia. The Patawomeck tribe and its members were granted state recognition by the Commonwealth of Virginia in 2010 (Encyclopedia Virginia). Historically and in contemporary times, this tribe has depended heavily on seafood from the Potomac River as a primary source of sustenance. Among the principal types of seafood traditionally consumed by the tribe are perch, herring, shad, eel, oysters, and crabs (Accokeek Foundation, 2021).

Eel Baskets

Eels and eel baskets are very important pieces of the Potomac tribe's history and culture. The eel baskets are eel traps that are made from woven materials, such as white oak splits or other similar and readily available plant fibers. After weaving the baskets, members of the tribe would dip them in tar to make them waterproof. The eel baskets are designed to capture eels. With a cylindrical shape and a funnel- like opening, they make it easy for eels to enter the trap but very difficult for them to escape.

Historically, the tribe would use eels, similar to the one illustrated in Figure 9, as a source of independent income, as they were valuable for export and for use as crab bait (The Annapolis Maritime Museum and Park).

These baskets, such as the one pictured in Figure 10, symbolize their profound connection to the waterways and the land. They also serve as a testament to how the tribe has adapted and persevered in sustaining their way of life for many generations. This tradition is not only commemorated but is actively practiced by tribal members. Currently, the Potomac tribe is the sole indigenous group that continues to use original materials and traditional methods to craft eel baskets, while strictly avoiding modern wire and machinery. This adherence to traditional practices displays the Potomac tribe's resilience against colonial influences and modernization, both historically and in the present day (Secretary of the Commonwealth).

The Connection

Eels native to the Potomac River represent a compelling and essential link between the ecological health of the river and the historical culture and traditions of the Potomac tribe, which has inhabited this waterway for centuries. The significance of eels extends beyond their role as a traditional food source; they also contribute to the stability of the river’s ecosystem in ways that support water quality and biodiversity. Among these contributions, their unique relationship with other aquatic species— particularly mussels—stands out as a key factor in maintaining the river’s natural balance.

As previously mentioned, these two species are interconnected through a symbiotic relationship that benefits the entire ecosystem. Early on in their symbiotic relationship cycle, mussel larvae attach themselves to the gills of fish within their aquatic environment, and in the case of the Potomac River, they specifically attach to the gills of eels. Upon reaching maturation, these mussel larvae settle on the riverbed and begin to contribute to improved water quality through their filter-feeding and purification activities.

Mussels function as natural filter feeders, drawing in water, absorbing nutrients, and trapping solids and contaminants, including sediment and pollutants.

This makes them essential for maintaining and even enhancing water quality. An increased presence of mussels within an ecosystem correlates with a greater filtration capacity of the river. Furthermore, since eel populations play a crucial role in mussel dispersal, healthy eel populations contribute to cleaner water overall.

The filtering capabilities of mussels in the Potomac River significantly influence the safety and quality of the river’s aquatic life, as well as the seafood sourced from it. When water quality deteriorates, contaminants such as heavy metals, pesticides, and industrial runoff can accumulate in the tissues of fish and shellfish, thereby posing risks to consumers.

Conversely, in cleaner, healthier aquatic environments, fish and other seafood are not only safer to consume but also flourish in greater abundance. This point is particularly crucial for the general public and communities such as the Potomac tribe, which rely on local aquatic life for regular dietary intake.

For the Potomac tribe, the Potomac River is more than just a natural resource — it is a sacred and sustained reminder of their culture, identity, and resilience. The traditional diets of the Potomac tribe have historically included native fish and shellfish, including eels. Good quality water ensures these natural food sources can continue to be consumed safely, preserving not only physical health, but also cultural continuity. Sharing traditional meals is a key aspect of community life in the Potomac tribe.

Having access to clean, locally sourced seafood allows this tradition to be continued authentically and sustainably.

The entire Potomac River ecosystem holds significant importance in the history of the Potomac tribe; however, the eels inhabiting the river possess an even deeper cultural significance. Beyond their ecological roles, eels are integral to a long-standing tradition of eel harvesting, which reflects the community's resilience and resistance to assimilation within the Potomac tribe.

The crafting and utilization of eel baskets, intricately woven traps historically employed to capture eels from the Potomac River, represent a notable tradition that embodies the resilient and resistant spirit of the Potomac tribe. Historically, eel fishing served not only as a vital food source but also as a critical means of achieving economic independence. In earlier centuries, the Potomac tribe utilized eel harvesting and trading as a strategy to resist colonial pressures and assert their autonomy. Presently, the practice of using eel baskets is no longer primarily aimed at financial gain; rather, it stands as a living testament to the tribe's perseverance and enduring connection to the river, a legacy that has been passed down through generations.

The story of the eel extends beyond mere aquatic ecology; it encapsulates themes of independence, resistance, and survival. By facilitating the transport of juvenile mussel larvae, promoting clearer water, ensuring safer seafood, and upholding tribal traditions that have persisted for centuries, the eel serves as a keystone species within the Potomac River ecosystem. Its journey is intricately interwoven with the historical, contemporary, and future contexts of the river, as well as the lives of those who have long inhabited its banks.‌

The Takeaway

Maintaining the delicate balance between aquatic life, water quality, and cultural practices requires active stewardship of the river and its resources. This means not only protecting the species involved but also restoring and preserving the surrounding habitats and overall water quality. By investing in the health of the river's ecosystems, we help ensure

that these natural and cultural systems can continue to thrive together.

Ways to Preserve Water Quality and Habitats

Proper disposal of hazardous household items: Household items and waste, such as oils, chemicals, paints, cleaners, preservatives, and medicine/drugs, should not be disposed of by pouring them down the drain or flushing them down the toilet, as they can harm the waterways they would eventually flow into. The best way to dispose of these hazardous materials is to check with a local county waste management service to see what they accept and what their disposal recommendations are (Chesapeake Bay Foundation).

Limit the use of fertilizers and chemical herbicides and pesticides: The chemicals and fertilizers used primarily for aesthetic landscaping purposes in residential areas can be limited in most cases, and should be due to their tendency to promote excessive algae growth caused by high levels of phosphorus and nitrogen eventually entering the water (Chesapeake Bay Foundation).

Regularly service septic systems: Yearly inspections should be performed to ensure they are properly functioning. A malfunctioning or failing septic system can cause waste to leak into the groundwater, which can ultimately end up in local waterways through runoff and other forms of pollutant transport (Chesapeake Bay Foundation).

Use native plants for landscaping: Implementing landscaping with indigenous plant species can significantly contribute to the health and stability of local water bodies in several ways. Primarily, plants with deep root systems can help mitigate runoff and soil erosion. The use of native plants is particularly advantageous because they are well-adapted to thrive in their specific regions and climates, requiring minimal assistance with watering and fertilization (Chesapeake Bay Foundation).

Limit/ eliminate bare spots in the yard: A bare spot is characterized as an area devoid of vegetation, consisting solely of bare soil. These areas pose a significant threat to waterways, as stormwater and rainfall often struggle to infiltrate the ground due to compacted soil that lacks root systems to maintain permeability. Moreover, these areas can contribute to the transport of soil and sediment into nearby water bodies (Chesapeake Bay Foundation).

Plant a rain garden: The primary objective of a rain garden is to mitigate flooding, reduce erosion, and filter runoff water in low-lying areas that are typically prone to flooding during storms (Chesapeake Bay Foundation).

Install rain barrels: Rain barrels, like the one pictured in Figure 11, are designed to be placed at the bottom of a downspout and collect rainwater. They can typically hold between 55 and 75 gallons of water runoff from rooftops, reducing flooding and erosion (Chesapeake Bay Foundation). In the state of Virginia, rain barrels are completely legal and encouraged by local governments; however, before using rain barrels in other states, it's important to check local policies, as in some areas rainwater collection is prohibited or requires a special permit.

Plant a living shoreline: Living shorelines offer significant ecological benefits by mitigating erosion and restoring aquatic habitats and wildlife populations. Such projects can be undertaken at a residential level by individuals living near water bodies or on a larger scale by coastal communities (Chesapeake Bay Foundation).

Install permeable pavers: When considering the replacement of a driveway, it is advisable for individuals to opt for permeable pavers. These allow water to infiltrate into the soil rather than running off, thus reducing surface runoff (Chesapeake Bay Foundation).

Plant trees: Trees contribute to environmental health by releasing oxygen into the atmosphere. Also, their root systems play a crucial role in preventing erosion and absorbing soil contaminants, including fertilizers and chemicals (Chesapeake Bay Foundation).

In summary, the optimal equilibrium among the various components of natural systems has existed for a considerable duration. The eels, which harbor the larvae of natural filter feeders on their gills, the mussels that serve to naturally cleanse the water, and the Potomac tribe's effective utilization of the river illustrate a historical capacity for self-regulation within these ecosystems. However, human involvement and activities have significantly disrupted this delicate balance of nature. To mitigate further damage, individuals need to be educated about the waterways in their communities and how they can contribute to the health of their natural resources and environments. By fostering healthier waterways, there is potential to partially return to historical methods of water filtration that rely solely on native filter-feeding organisms, thereby reducing the necessity for human intervention.

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