Background of the Study
Access to clean and safe drinking water is universally recognized as a fundamental human right and is vital for maintaining public health. The United Nations has emphasized the importance of water in Sustainable Development Goal (SDG) 6, which aims to ensure the availability and sustainable management of water and sanitation for all by 2030 (United Nations, 2015). Despite global efforts, many regions, especially in developing countries, continue to struggle with water quality issues, significantly impacting health and economic development.
Borehole water is a critical source of drinking water in many rural and peri-urban areas worldwide. Boreholes are deep, narrow wells drilled into the ground to access groundwater, often serving as a reliable water supply in regions where surface water is scarce or polluted (Smith et al., 2018). However, while borehole water can be a relatively safe and sustainable source, it is not immune to contamination. The quality of borehole water is influenced by various factors, including geological formations, land use practices, and the integrity of the borehole structure (Adeyemi et al., 2020).
Bacteriological contamination of borehole water is a significant concern. Pathogenic bacteria, such as Escherichia coli (E. coli), Salmonella, and Vibrio cholerae, can enter boreholes through surface runoff, infiltration from contaminated soil, or direct entry due to poorly constructed or maintained boreholes (Edberg et al., 2021). The presence of E. coli, a fecal coliform, is particularly alarming as it indicates potential contamination by human or animal waste, posing severe health risks such as gastrointestinal infections, dysentery, and other waterborne diseases (Hunter et al., 2016).
In many developing countries, inadequate sanitation facilities and practices exacerbate the risk of bacteriological contamination. Open defecation, improper waste disposal, and inadequate sewage systems can lead to the contamination of groundwater sources, including boreholes (Ndiaye et al., 2019). Furthermore, the lack of regular monitoring and maintenance of boreholes can result in the deterioration of water quality over time, increasing the risk of bacteriological contamination (Mbah et al., 2021).
In addition to bacteriological quality, the physiological parameters of borehole water are crucial indicators of its overall safety and acceptability. Physiological parameters include pH, turbidity, electrical conductivity, and the presence of dissolved minerals such as calcium, magnesium, and nitrates (Reid et al., 2018). These parameters affect the taste, color, and odor of water, influencing its palatability and suitability for consumption and other uses.
The pH level of water indicates its acidity or alkalinity. The ideal pH range for drinking water is between 6.5 and 8.5. Water with a pH outside this range can be corrosive or cause health issues (WHO, 2019). For instance, highly acidic water can leach metals from pipes, leading to elevated levels of toxic metals like lead in drinking water (Gude, 2017).
Turbidity measures the cloudiness or haziness of water caused by suspended particles. High turbidity can harbor harmful microorganisms, reduce the effectiveness of disinfection processes, and indicate the presence of organic and inorganic contaminants (WHO, 2022).
Electrical Conductivity measures the water's ability to conduct electricity, which correlates with the concentration of dissolved salts and minerals. High electrical conductivity may indicate contamination from agricultural runoff or industrial waste (Bello et al., 2019).
The concentration of minerals such as calcium and magnesium affects water hardness. While moderate levels are beneficial for health, excessive concentrations can cause scale formation in pipes and appliances and pose health risks (Hrudey & Hrudey, 2020).
Ensuring the safety of borehole water requires adherence to established water quality standards. The World Health Organization (WHO) provides comprehensive guidelines for drinking water quality, covering microbiological, chemical, and radiological parameters (WHO, 2019). These guidelines serve as a benchmark for national and local standards, helping governments and organizations develop policies and practices to safeguard public health. In many countries, national agencies adopt and adapt WHO guidelines to address local conditions and challenges. However, implementation and enforcement of these standards can be inconsistent, particularly in low-resource settings where monitoring and regulatory capacity may be limited (Akpabio et al., 2021). Consequently, communities relying on borehole water often face uncertainties regarding water quality and safety.
Given the critical role of borehole water in providing drinking water to millions of people, it is essential to continuously assess and ensure its quality. This study aims to evaluate the bacteriological and physiological parameters of borehole water in selected communities, identifying potential health risks and sources of contamination. By comparing the findings with national and international standards, the study seeks to highlight areas for improvement and propose strategies to enhance water quality and safety.
1.2 Statement of the Problem
Despite the widespread use of borehole water, many communities face challenges related to water quality and safety (Ndiaye et al., 2019). Contaminated borehole water can lead to waterborne diseases, posing significant health risks, particularly in areas lacking adequate water treatment facilities (Onabulo et al., 2020). This study addresses the urgent need to assess and improve the bacteriological and physiological quality of borehole water to protect public health and ensure sustainable water resources (Mbah et al., 2021).
1.3 Objectives of the Study
The primary objectives of this study are to:
1.4 Research Questions
The study aims to answer the following research questions:
1.5 Significance of the Study
This study is significant for several reasons:
Public Health: By identifying and addressing water quality issues, the study contributes to reducing the incidence of waterborne diseases and improving public health (Hunter et al., 2016).
Policy Development: The findings can inform policymakers and stakeholders on necessary regulations and interventions to ensure safe drinking water (Hrudey & Hrudey, 2020).
Sustainable Development: Enhancing the quality of borehole water supports sustainable development goals (SDGs), particularly SDG 6, which aims to ensure availability and sustainable management of water and sanitation for all (UN, 2015).
Community Awareness: The study raises awareness among local communities about water quality issues and encourages proactive measures to protect water sources (Akpabio et al., 2021).
1.6 Scope and Limitations
The study focuses on borehole water in selected communities within a specified geographic area. The scope includes bacteriological and physiological analysis, comparison with water quality standards, and identification of contamination sources. Limitations include potential variability in sampling methods, seasonal changes affecting water quality, and limited generalizability to other regions (Bello et al., 2019). Additionally, logistical and resource constraints may impact the comprehensiveness of the analysis.
1.7 Structure of the Thesis
The thesis is organized into five chapters. Chapter 1 introduces the study, outlining the background, problem statement, objectives, research questions, significance, scope, and limitations. Chapter 2 provides a comprehensive review of relevant literature on water quality, borehole water use, and analytical methods. Chapter 3 details the methodology, including research design, sampling techniques, and analytical procedures. Chapter 4 presents the results of the bacteriological and physiological analyses, discusses the findings, and highlights the implications for public health and policy. Chapter 5 concludes the study with a summary of findings, recommendations for policy and practice, and suggestions for future research.
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