Water Pollution Laws in Sierra Leone—A Review with Examples from the UK and USA

In Sierra Leone, poor water quality is a major threat to public health and aquatic life. The main source of this problem appears to be poorly regulated waste disposal. Even though water pollution laws exist, their enforcement is challenged by many gaps and, seemingly, they focus on the quest to sustain natural resource exploitation. This work presents a case for strengthening such laws to promote public health, economic growth, and resource conservation. The article presents examples of problems that necessitated promulgation of water pollution laws in the US and the UK. Sierra Leone has been affected by similar problems such as public health, war efforts, and industrialization.


Introduction
Before the 2000s, Sierra Leone did not prioritize environmental quality as an important pillar to sustainable development, albeit the need to do so in much the same way as the nation prioritized the social and economic considerations of policies and laws [1]. Reports have indicated, however, that poor environmental quality undermines achievement of economic gratification and societal satisfaction [2]. When public health is compromised by pollution, the country's productivity and competitiveness will take a downward trend [3]. This article presents a case for strengthening water pollution laws in Sierra Leone to enhance benign public health and aquatic life. and exports and was a strategic location for the British Empire during the World Wars [12].
In Sierra Leone, most outbreaks are either water related or water borne. Sierra Leone has poor water supply and sanitary facilities. Most people rely on untreated water sources such as hand dug wells, springs, and streams for water use.
This leads to cholera emergencies in most rainy seasons [13] [14]. Additionally, typhoid fever is very common among citizens. Sewage ends up into those water sources through surface runoff and base flow, introducing pathogens that cause the disease [15]. The high prevalence of Malaria also has to do with poor sanitation and stagnated water [15].
Natural resource needs were prominent in the war in the 1990s when it was mainly fueled by diamonds. Sierra Leone lists among countries with the largest deposit of diamonds in river beds, along the shoreline of major river basins, or in wetlands. Diamonds were used in exchange for weapons by the warring factions in the civil war. None certified diamonds from Sierra Leone were later labeled blood diamonds which made them illegal to buy. This policy helped bring the fighters to a negotiating table and the war ended in 2002 [16].
Albeit the centrality of water resources in major events and development efforts in Sierra Leone, the laws governing waters of Sierra Leone (WOSL) have not been an area of high priority. Sierra Leone is trailing behind many other developing countries in ensuring uninterrupted water supply, pollution management, and other beneficial uses of natural resources [17]. This work examines existing laws related to water quality in Sierra Leone. Two examples, evolution of water pollution laws in the US and the UK, are put in the context of how those laws may apply to Sierra Leone.

The Problem
Sierra Leone faces challenges in managing contamination, conservation, and supply of its water resources. As a result, the nation's authorities have, over the years, developed laws, policies, and regulations to curb these challenges. These laws have enhanced the establishment of agencies with specific mandates for water resource management. However, most of the efforts have been geared towards promoting water supply and maintenance of natural resource use. As a third world country, the nation still struggles to achieve social and economic development to the extent that environmental quality is inevitably a low priority.
Hence, there has been minimal water pollution laws which scantily exist as sections or subsections in natural resource management laws. Consequently, even though the country has laws to manage its waters, the magnitude of pollution and the impact of its abatement efforts are not clear.
Poor sanitation is one of the major challenges facing the water sector in Sierra Leone. The Minister of water Resources in the Koroma-led government confirmed this in an interview with the Awoko Newspaper when he recounted that millions of citizens were yet to have access to improved water supply and sanita-  [18]. Furthermore, there have been repeated cases of water borne disease outbreaks that source from poor sanitation in Sierra Leone. The Ministry of Health and Sanitation (MoHS) and the World Health Organization (WHO) have been reporting cases of cholera outbreaks since 1970, when 293 cases were recorded [2]. Since then, cases have frequently occurred during the rainy season and the worst outbreak occurred in 2012 when a record 22,885 cases with 298 fatalities were recorded. In that year, President Koroma declared a state of public health emergency and international partners helped the Government of Sierra Leone (GoSL) to reverse the outbreak.
These outbreaks have been attributed to poor sanitary conditions and practices that contaminate water supply sources. WHO (2013) report that 55% of people living in Sierra Leone had access to improved water sources in 2010, but only 13% had access to proper sanitation facilities in the same year. The WHO report also asserts that sanitation related disease outbreaks occur in the rainy season when surface runoff is high. The Millennium Challenge Coordinating Unit (2013) has also attributed diarrheal diseases to poor water and sanitation [19]. The problem has been reported to affect both urban and rural areas in Sierra Leone. The WHO and UNICEF (2014) assert that 22% of the population who live in urban areas in Sierra Leone used improved sanitation facilities in 2012 and this is a 1% improvement since 1990. Unimproved facilities include poorly constructed latrines and open defecation [20].
According to the WHO/UNICEF report, only 7% of the country's rural population used improved sanitation facilities in 2012 (improved by 2% since 1990).
More than half (54%) of them used sanitation facilities that were unimproved whilst 39% used open defecation, which was 26% in 1990 [20]. Bawoh and Koroma (2015) examined the people's knowledge, attitude, and practice of sanitation in one of the major cities in Sierra Leone, Bo. They concluded that the general level of knowledge on waste management was not adequate and it negated attitude and practice. Furthermore, there is a poor waste disposal system due to the weak infrastructure for waste management [21].
In Sierra Leone, there is minimal success rate of regulatory systems to manage waste disposal in municipalities and rural communities [22]. Managing the constant streaming of waste from residential, commercial, and industrial areas has gained low priority over the years. The sector has been manned by many governmental and private agencies none of whom has been successful [22]. The country lacks sewer systems for conveyance and treatment of sewage. The com- There is no known regulatory framework to manage stormwater runoff into waters of Sierra Leone (WOSL). In recent years, Sierra Leone's Environmental Protection Agency (EPA-SL) has been regulating construction companies through environmental impact assessment (EIA) licenses that have environmental management plans for construction waste. However, construction activities do not require any construction permit to protect WOSL thereby rendering susceptibility of those waters to sediment load. Sediment transport is a major problem whenever there is a major rain event. In addition, surface runoff in culverts and ditches conveys large quantities of solid waste into WOSL [22].
Sierra Leone imports petroleum products from neighboring African countries.
Since oil and gas is not currently mined or refined in Sierra Leone, there are no known water quality issues related to the oil mines and processing. However, knowledge and attitude regarding disposal of waste oil and lubricants are poor.
With the absence of stormwater management programs, the waste oil and lubricants end up in WOSL. Additionally, the nation has petrol (gasoline) stations in many locations. There is currently no available data on leaks from underground storage tanks. If any, these may lead to contamination of groundwater by petroleum hydrocarbons [24].
The major industries that affect water quality in Sierra Leone are mining, trade and commerce, transportation, construction, small scale manufacturing, and hospitality. The main pollutants of concern from mining are sediment, lubricants, and waste oil. In addition to mining companies, artisanal and small scale mining operations regularly introduce these wastes into WOSL.
Petty trading is a major industry in the informal sector of Sierra Leone. Citizens get most of their goods and services from this sector and, through this, they generate tons of waste. However, no data is available to determine the magnitude and dispersal of pollution from the waste, neither has there been any successful regulatory practice. The transportation industry (onshore and offshore) is mainly private and minimally regulated for waste disposal. Waste oil, lubricants, worn out parts and many other types of waste come from this industry most of which end up in WOSL.
Other than EIA requirements for construction companies, major construction activities by actors in the informal sector are not regulated for water quality purposes. Consequently, there is absence of beneficial management practices that minimize the impact of construction runoff. These construction activities are clearing vegetation and increasing the spatial extent of impervious areas.
Small scale manufacturing companies are mostly involved in beverage production. The main issue of concern is wastewater from the factories. However, most of these activities are regulated through compliance to EIA requirements.
The question lies in the effectiveness of compliance. The same situation happens in the hospitality industry, where hotels and restaurants are a major concern when it comes to discharge of wastewater and food waste.  [25]. Rice is the nation's staple food and the most cultivated crop [26]. Even though, Sierra Leone depends mainly on imported rice [25], rice cultivation remains a major livelihood activity in the country [26]. Tillage is a major source of sediment erosion [27]. This means a major pollution from farming in Sierra Leone would be sediment load owing to the dominance of tillage farming. However, availability of data on sediment load from nonpoint sources, such as farming, is limited.
Since the 1920's, Sierra Leone has experienced major earth moving activities for the extraction of precious minerals including diamonds, rutile, bauxite, gold and small amounts of iron ore and limonite [28]. Diamond deposits are estimated at about 7700 square miles (about 25% of the nation's land area) in the southeast and eastern parts of Sierra Leone [28].
Diamond mining has been a source of sediment load and waste oil into major drainage basins in the country [29], the Sewa, Bafi, Mano, and Moa Rivers inclusive. Alluvial diamond mining includes instream mining, along floodplains, terracing forested areas, and mining in wetlands. Albeit these sources of water quality impairment, no available data exists, neither are major regulations, except for EIA requirements that came into force in 2000. Gold production from alluvial deposits [28] is also a major source of sediment load into WOSL. Few gold mining companies secure EIA license in addition to the large number of unregulated artisanal and small scale mining activities.
Bauxite from Sierra Leone is mined mainly in the southern region and it is not clear whether the mine wastes are subject to any regulatory standards for water quality. Sierra Leone is known for its particularly high-grade rutile, also from the southern region. It is the largest natural reserve in the world and accounting for a third of the total world production [28]. The activity involves major earth removal including relocation of whole villages and creation of large ponds from dredging. The company has been embarking on rehabilitation and land reclamation exercises, according to its 2016 report [30]. However, no record was found on water pollution regulations and compliance.
Iron ore mining has involved drilling and blasting of hills in northern Sierra Leone with stockpile of mine tailings. Recently, companies have environmental management departments that institute beneficial management practices, mainly sediment retention ponds. However, this may not be enough. The Tonkolili River, for example, has been extremely turbid following operations in Ferengbeya in the Bumbuna area.  [31]. These created the pillars for developing or strengthening of laws that address specific environmental issues and water quality is one of those key issues. Under the water sector challenges, the agenda includes careful management as a priority for minimizing threat to water quality from population growth, increased industrial activities, poorly managed urban development, increased damming, industrial scale agriculture, and environmental degradation causing soil erosion, drainage of wetlands, pollution of rivers, and the rapid increase in the number of mining companies. One of the sector objectives is to develop comprehensive plans for the integrated management and efficient use of water resources. The objective emphasizes sustainable water use and management through the requirements for beneficial uses such as agriculture, fishing, drinking, mining, energy, tourism, and natural resource conservation [32]. Under this act, "damage to the environment" refers to physical damage to human health or marine life or resources in coastal or inland waters or areas adjacent thereto, caused by pollution, contamination, fire, explosion or similar major incidents. Up to eight sections address the issue of pollution from vessels.

Benefits of Strengthening Water Pollution Laws in Sierra Leone
In the 21 ST century, Sierra Leone is part of a global community that promotes sustainable development. There has been increasing awareness that poverty alleviation and economic development cannot go without sustainable environmental quality [33]. There is need to prioritize safe disposal of waste to prevent pollution related health problems [34]. These pollution prevention steps will keep the nation's scenic rivers, lakes, and oceans intact for tourist attractions.
They will also boost markets for contaminant-free sea food and biodiversity conservation. These will generate high paying jobs and improve the living standards of Sierra Leoneans [34].
Thankfully, The GoSL has been investing efforts in these directions when it However, strengthening and/or expanding on those sections to address potential policy gaps would enhance achievement of those policy objectives. Currently, the main foundation of those existing laws is economic gratification from natural resources. In order to enhance and maintain clean water for citizens and resource conservation, the foundational structure of water pollution laws would evolve around all problems and opportunities that affect the resource, people's welfare, and aquatic life.
Water resources give Sierra Leone a great potential for deriving benefits from the tourism industry. The nation's pristine beaches, islands, mountains, and rich biodiversity [35] are sustained by major drainage basins that run through and support those crucial habitats on their way to the Atlantic Ocean. Example, recreational beaches along the Freetown peninsula display the colors of the Sierra Leone flag (Green, White, and Blue), starting with the forested mountains in the south, coupled with swamps that transition into the white sand at Number Two/Tokeh beach, and clear blue water in the north [36]. The Tiwai Island, 12 sq. km in area and located in the Moa River, is host to 11 primate species, over 135 bird species, numerous butterfly species (some of which have recently been discovered by science) and at least 627 known plant species. Tiwai is also home to the extremely rare and elusive pygmy hippopotamus [36]. Sierra Leone Government's effort to promote and develop the tourism industry has been limited for many years [37]. In 2010, the Office of the President reviewed the industry to improve policy and actions that match modern tourism and culture requirements. The recommendations made centrality on law reform with the view of promoting sustainable tourism to ensure economic growth, socio-cultural integration, and to promote Sierra Leone as an environmentally friendly destination [38]. These sustainability requirements strengthen the need to improve on water pollution laws more so when the tourism industry is heavily dependent on the nation's aquatic resources.
Strengthening the statutory provisions for stormwater quality will help promote public health in addition to sustainable natural resource use. This is because stormwater conveys sediment, solid waste, waste oil, and hospital waste into rivers, lakes, and the Atlantic Ocean in Sierra Leone. They are proven sources of illnesses either directly or through biomagnification [39]. Groundwater is also susceptible to contamination from sewage disposal, making its regulation crucial.

Examples of Water Pollution Laws and Their Evolution over Time
Pollution laws mostly evolve around problems that either lead to the pollution itself or were created by the pollution. History has shown that humans always continue to pollute the environment until a significant issue imposes the urgent need to develop laws that mitigate or minimize the likelihood of such pollution.
Some of the issues include disease outbreaks, fire accidents, fatalities in fish and wildlife, and study reports that reveal imminent danger [40]. Below are examples of the evolution of water pollution laws in the US and the UK. The lessons learned from these two countries are that environmental laws are complex and yet cannot be excluded from the social and economic development efforts in a nation.

Evolution of Water Pollution Laws in the United States
Water pollution management in the US took prominence in the 19 th century when it became obvious that humans can render water bodies harmful by dumping waste materials [41]. Most of the significant milestones in the promulgation of laws and regulations for water pollution management were triggered by concerns that resulted from water pollution problems.
The multifaceted Anglo American Common Law generally refers to the unwritten law of England that was brought in to the American Colonies and enacted upon formation of the United States [42]. This law made it acceptable to dump waste into waterways as long as there was access to a water body and the disposal did not pose threat to property rights or public interest. In the 19 th century, this blanket amnesty to polluters started to change when local governments began enforcing legal authority due to serious water pollution problems within their jurisdiction. Entire rivers and watersheds became more and more polluted Most of the water pollution efforts were driven by public health concerns [43].
This is why most of the water pollution management agencies were hosted in state public health departments [43]. The primary public health concerns were health issues caused by disposal from sanitary sewers, municipal waste treatment plants, and industries dumping large loads of raw organic waste into waterways.
By the early 20 th century, diseases like cholera and typhoid fever were linked to drinking contaminated water. The U.S Public Health Service (PHS), in 1912, published their report of an investigation that was commissioned by Congress.
This triggered collaborative efforts between the PHS, states, and local public health departments to develop national standards for chlorination and other treatments of public drinking water supplies [43].
Another significant issue that necessitated water pollution laws was navigation [44]. In 1972, this law became part of the Clean Water Act [43].
Despite the Oil Pollution Act of 1924, Federal laws did not require states to ensure safety of waters for citizens and, hence, no regulation for oil discharge into inland waters existed [45]. There were several river fires, Cuyahoga River fires of 1952 and 1969 listing among them. The 1952 fire resulted from unregulated oil discharges, allowing the oil to accumulate into thick blankets over the surface. The fires had great publicity and laid the foundation for the Federal Water Pollution Control Act [45].
The next era of water pollution management saw emergence of interested parties for different aspects of water quality management. There was growing pres- that required regulation to enhance deterrence. Some members of congress saw the need to broaden federal involvement into water pollution management [43].
The outcome of a 1935 national conference on water pollution and recommendations from the advisory committee of the National Resources committee inspired a proposed bill on water quality management but did not pass in Congress. Several other bills did not meet common interest to pass through both houses of Congress. One major concern was drawing a line between state and federal management levels. In 1938, President Roosevelt vetoed a bill that passed though both houses on the pretext of separation of powers. He argued against one of the provisions that he thought conflicted with the prerogatives of the Executive Branch, albeit his deference to the general popularity of the bill [43].
When the world wars started, attention was diverted from water pollution management to war efforts. There was great investment in technologies that used mineral resources to fight in the wars. These practices led to further pollution of the nation's waters. Several legislations to prevent pollution from these sources were proposed during the war and immediately after but, most of them However, Congress overrode President Nixon's veto and passed the amendment into law which later became the Clean Water Act (CWA). The purpose of the CWA is to restore and maintain the chemical, physical, and biological integrity of the Nation's waters [52]. It sets targets of waters becoming fishable and swimmable, and the elimination of pollution in all navigable waters of the United States. The CWA was in response to many litigations that claimed unlawful discharge of pollutants under the Rivers and Harbors Act [43].
The CWA was amended in 1977 and gave EPA the authority to implement pollution control programs and standards that regulate industrial discharge, set water quality standards for contaminants in surface waters, make it unlawful for any person to discharge without permit into navigable waters, fund construction of sewage treatment plants under the construction grants program, and plan to address nonpoint source pollution [53]. Congress included new provisions to address 65 toxic pollutants using best available technology (BAT) and to be The CWA has two important sections that are useful to the thesis of this article, point and nonpoint sources of pollution. The term "point source" means any discernible, confined and discrete conveyance, including but not limited to any pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, or vessel or other floating craft, from which pollutants are or may be discharged. This term does not include agricultural storm water discharges and return flows from irrigated agriculture [39]. This section addresses the need for greater federal leadership to help focus state and local nonpoint source efforts. Under Section 319, states, territories, and tribes receive grant money, which is 60% of funding that match 40% contribution from the local partner, to support a wide variety of activities including technical assistance, financial assistance, education, training, technology transfer, demonstration projects, and monitoring to assess the success of specific nonpoint source implementation projects [53].
Over the years, implementation of water pollution laws and regulations in the US has unveiled a variety of complexities that triggered controversies and adjustments in the laws. Moreover, the US has learned that enforcing pollution abatement cannot be separated from satisfying society while at the same time striving to advance economic development. These realities were the motivation behind less punitive measures in pollution prevention. Section 319 in the Clean Water Act is an example, which has an objective of encouraging an integrated approach of pollution abatement [53]. Albeit all the awareness and progress made, the US still has many citizens who struggle with rationalizing the need to have environmental laws as part of the development equation. Those citizens believe environmental laws kill jobs and discourage economic development. Consequently, the country is deeply divided along political lines as dictated by these policy debates [55]. The lesson learned is that even though environmental laws (such as water pollution laws) are inevitable, their coding should be unique to the social, cultural, and economic wellbeing of the affected population. These laws can be successful when they are dynamic in response to changing trends in the population.

Evolution of Water Pollution Laws in the United Kingdom
Major of the milestones in the UK's water pollution management were determined by sanitation problems, the industrial revolution in the 1800s, post-World War reconstruction needs, and the late 20 th century sustainable development era [56]. The UK's water pollution issues became a major concern in the late 18 th century when the volume and complexity of waste increased in major cities.
Processing of cotton and wool, and production of iron and steel created the need to concentrate factories near water bodies to help power water wheels; this resulted in booming populations in major cities [57]. This population rise led to increase in the quantity of domestic sewage as well as solid and liquid industrial waste, most of which ended up in river systems. The resulting effects were stinking cities, poor water quality, and loss of aquatic life [58]. These issues created public health concerns and the need for proper waste disposal became important.
In the 1800s, it was widely believed that cholera was spread by "miasma" Snow launched an advocacy for shutdown of the pump at Broad Street but this met resistance from authorities who were skeptical of his findings [59]. His theory faced resistance mainly because "miasma" was supported by leading pub-  [59]. His theory became popular when River Thames was rendered a major source of cholera deaths; politicians were forced to act and solve London's water pollution problems [60]. Part I has provisions that prohibit discharge of solid matter into streams. Part II has provisions that prohibit sewage discharge into streams through sewers.
Part III prohibits discharge into streams through drainage from manufactories.
It also has provisions that prohibit drainage into Streams from mines of any solid matter in such quantities that can create pollution problems. Royal Commission on Sewage Disposal was responsible for investigating and reporting on methods of sewage treatment. The reports included sewage treatment methods that satisfied existing laws, rules to be adopted if more than one method proved suitable, and recommendations that would inform proper treatment and disposal of sewage [61]. These reports formed the basis of modern sanitary engineering practice.
The industrial revolution was another turning point for water pollution laws when emerging technologies that pinpoint sources of industrial pollutants gave way to the era of source specific pollution laws [62]. With globalization in the late 20 th century, the world became increasingly connected and sustainable development became the driving force behind pollution laws. Increasing awareness in environmentalism brought in concepts like "The Silent Spring", "Tragedy of the Commons", and "The Limit to Growth".
England is among the countries that led development of both domestic and international laws to protect the environment. These modern laws take into account the social, economic, and ecological significance of issues surrounding

Comparing Pollution Laws in Sierra Leone to Those in the US and the UK
Current water pollution management in Sierra Leone is similar to those in the US [65] and the UK in the 1800s. Compared to the US, Sierra Leone was once a British colony and common Law is also part of the nation's legal system [7]. Civil law suits dealing with waste disposal into water ways, especially in rural areas and communities within cities, are settled on the basis of common law. The chief or tribal head settles such disputes based on tradition and common sense.
While statutory laws exist to discourage discharge of pollutants into WOSL, it is not widely known if records of major criminal or civil law suits that are directly related to pollution of the nation's waters exist. Since most of the statutory provisions for clean water have not been tested in court, it seems unclear whether they may be inadequate; future law suits will determine gaps in their legal extent of enforcement.
Compared to the UK in the 1800s, contemporary dwelling of people along water bodies in Sierra Leone is primarily due to rural-urban migration. This practice became prevalent during the civil war in the 1990s when people fled war zones and moved into safer cities. Overpopulation of major cities led to backfilling of coastal areas as well as wetlands and ponds for dwelling purposes [23].
Unlike the UK and the US, when they prioritized water pollution abatement because of public health disasters in their dawn of water pollution laws, no record is available in Sierra Leone that shows statutory priority of public health as a result of water pollution. Even though records show prevalent water borne diseases [2] compared to those in the UK and the US in the late 18 th century, government policy has been more reactive as well as little to no efforts in promulgation of laws that minimize the likelihood of the problem.
Sierra Leone seems to be in similar 18 th century scenario as UK/USA in that disposal of waste, directly or via some conveyance, into waterways is met with little to no law enforcement. In situations where there are existing laws, they are either weak or barely known. The current belief systems with regard to pollution have similarity to the "Snow vs. miasma" situation in the 19 th century UK. It is widely accepted among most of the 57% illiterate population [66] that supernatural forces are responsible for poor health. This is also the case for some in the literate population. Nonetheless, the nation has seen disasters related to water and sanitation in several years [2] and this water borne and water related diseases have ranked among the major public health issues in several decades [2]. Albeit these repeated outbreaks, Sierra Leone has not commensurately responded with pollution laws to eliminate their sources and likelihood.
Similar to war efforts in the US during the world wars, natural resources played major role in promoting Sierra Leone's civil war in the 1990s. War-driven diamond mining [67] contributed sediment load into rivers adjacent to mine In the US, water pollution laws have been successful partly because they reflect the diversity in populations of the country. At the local level, for example, indigenous communities in Native American nations promulgate water laws in view of water as a cultural resource. These do not change in state laws of territorial waters, and Federal regulations reflect these diversities as well [68]. Similar consideration is a strong basis of the UK's water pollution laws as seen in statutory provisions taking into account the differences between Scotland, Ireland, and England. can be a promise of improved water quality in WOSL. This will subsequently lead to improved public health and living standards of the people.

Case Analysis: The US Clean Water Act
Efforts to improve water pollution abatement in Sierra Leone could cue from the structure and lessons learned in implementing the US CWA. The main commonality would be the resource itself and its component types-oceans, rivers, lakes and wetlands. In addition, humans the world over depend on these resources for food, energy, transport, and recreation. In the pursuit of these benefits, people contaminate the waters either deliberately or accidentally and pose health threats to humans and other organisms. Laws such as the CWA, promote deterrence of activities that cause such contamination to protect public health and the environment. On the other hand, delineating statutory requirements for regulating human activities, like point and nonpoint sources of pollution, would depend on the nature of such activities that discharge pollutants into WOSL. It will also depend on the people's priorities, cultures, and political will. In Sierra Leone, water pollution laws are not integrated into one statute like it is in the US CWA; each statute has its unique regulatory and administrative arrangements for managing water quality as it applies to that sector. This type of statutory arrangement has strength in ensuring deterrence of discharge from all sectors whose activities threaten the chemical, physical, and biological integrity of WOSL. However, this fragmented statutory arrangement for water pollution abatement may render undue burden on actors whose activities are affected by synergistic relationships between sectors. Another disadvantage may be the existence of statutory gaps because agencies are primarily interested in those aspects that affect their mandate. In this regard, the existence of gaps in statutes makes enforcement complicated and difficult.  A general permitting in the different categories could be a good way to manage pollution from these sources. These small scale industries could fill a notice of intent (NOI) form based on categorization and the required fee to be assigned. These permitting requirements will reverse the likelihood of pollution and promote beneficial uses of the nation's waters such as drinking, fishing, swimming, agriculture, recreation, power generation, and navigation.
The NPDES permit establishes discharge limits and conditions for municipal wastewater treatment facilities in cities across the US. In Sierra Leone, publicly owned treatment works (POTWs) do not exist. Rather, the country has private cesspool emptying companies who transact with residents to transport sewage to dumpsites. The country has no sewer infrastructure; homes, institutions, and commercial places have pit latrines or septic tanks. The raw sewage is periodically dug out and dumped in wetlands with significant nexus to WOSL. Sewage is a major source of impairment to water bodies; dumping of raw sewage is believed to increase pathogen population in the water body and pose health threat to aquatic life [70]. It also increases oxygen demand and cause bioavailability of toxic pollutants. Appropriate compliance schemes could be developed for private cesspool disposal companies to serve in lieu of POTWs.
The NPDES permitting program regulates discharges incidental to the normal operation of a commercial (i.e., non-military, non-recreational) vessel when operating as a means of transportation. In Sierra Leone, the Queen Elizabeth II Quay receives cargos from many countries. Mining companies use the Atlantic Ocean to ship their minerals. Fishing vessels are always on shore of the nation's territorial oceans and inland waters. Sierra Leone's richness in fish resources attracts fishing vessels from a number of countries, in addition to local fishing boats. They are potentially major sources of waste that can pollute aquatic resources. Strengthening the current pollution abatement program for these vessels, through a special permitting program, will insure sustainable fishing and economic growth in Sierra Leone. The US CWA establishes a program to regulate the discharge of dredge and fill material into waters of the US, including wetlands. Currently, in Sierra Leone, dredge and fill materials are covered under mining and EIA licenses. It appears that no laws exist to discourage construction of homes on wetlands. In urban and rural areas, it is common practice to see backfilling of wetlands and use for dwelling, commercial, or recreational purposes. Wetlands are very important for flood control and maintaining the chemical, physical, and biological integrity of downstream waters [39]. These are necessary for the protection of homes and public health. Without these wetlands, there will be no natural filters to clean runoff before entering into WOSL. This may cause transportation of sediments, solid waste, sewage, bacteria, and toxic wastes into Sierra Leone's waters thereby causing impairments and problems for humans and aquatic life [39].
In the US CWA, Nonpoint source mainly includes agricultural runoff and irrigation return flows. Under Section 319 of the Act, the Federal government works with states, territories, and tribes to share the cost of managing water quality impairment from nonpoint source pollution. The 319 program includes a wide variety of activities such as technical assistance, financial assistance, education, training, technology transfer, demonstration projects and monitoring to assess the success of specific nonpoint source implementation projects.
In addition to agriculture, waste disposal in Sierra Leoneans is indiscriminate.
The attitude towards waste is to trash anywhere expecting some authority to take care of it. There are very poor institutional arrangements for waste streaming in both urban and rural areas. Hence, identifying who pays for trash may be difficult. However, a nonpoint source program, such as the US CWA's 319 program, has a better chance of ensuring solution to this problem. Alternatively, waste disposal companies could be categorized as point sources of liter in cities and towns of Sierra Leone thereby enabling them to integrate the permitting requirements into their business models.

Conclusions
The objective of this work was to review existing water pollution laws in Sierra Leone to guide recommendations for areas that need strengthening. Sierra Leonean water quality laws were compared to those in the UK and the USA. The laws in those two countries have evolved since the 1800s and have improved significantly. However, enforcement has never been devoid of major challenges and controversies. The major turning points have been triggered by significant pollution events that compromised public health, aesthetic problems, biodiversity, tourism, and the general economic trends of the two nations.
Even though poor water quality has caused major public health problems, aesthetic issues, significant reduction in tourism, and biodiversity degradation, Sierra Leonean water quality laws have not followed similar trends as they did in the UK and USA. Water pollution laws became prominent in the early 2000s and had mostly been driven by natural resource exploitation. This is partly the reason why most of those laws are sections in statutes that promote natural resource management. The gap areas are usually handled by means of common law, which is largely unwritten.
For improved water quality laws in Sierra Leone, determinant factors need not only be natural resource management. Historical trends of water borne and water related diseases have shown that public health needs to be a major driver of amendments in the nation's water pollution laws. Other important drivers include aesthetics, biodiversity conservation, tourism, recreation, and the general outlook of the nation's economy.

Conflicts of Interest
The authors declare no conflicts of interest regarding the publication of this paper.