Evaluation of Groundwater Quality and Availability in Calabar South, Cross River State

CHAPTER ONE

1.0 Introduction

Water is an essential natural resource that supports all forms of life. Among all sources of water, groundwater remains the most reliable for domestic, agricultural, and industrial use, especially in areas with limited surface water. In many developing countries, including Nigeria, groundwater is the main source of drinking water for rural and urban populations. However, increasing urbanization, industrial activities, and poor waste management practices have led to contamination of groundwater sources, threatening both availability and quality. According to World Health Organization (WHO, 2020), access to safe drinking water is one of the most critical indicators of public health and sustainable development.

In Calabar South, Cross River State, groundwater is widely used for domestic purposes due to irregular public water supply. Many households rely on wells and boreholes as their primary sources of water. However, the rapid growth of residential areas, poor waste disposal practices, and proximity of septic tanks to wells have raised concerns about water quality. Pollution from surface runoff, leaking sewage systems, and industrial effluents can degrade groundwater quality, leading to health risks such as waterborne diseases (Eze & Nwankwo, 2019). Understanding the status of groundwater quality and availability in the area is therefore essential for ensuring sustainable water management.

1.1 Background to the Study

Groundwater occurs beneath the Earth’s surface in soil pore spaces and fractures of rock formations. It serves as a vital component of the hydrological cycle and provides a stable water source during dry seasons. However, in recent years, groundwater contamination has become a growing concern due to human activities such as open dumping of waste, improper sanitation, and agricultural runoff. Studies have shown that groundwater quality in urban areas is often influenced by land use patterns and population density (Obi & Etim, 2021).

Calabar South is one of the most densely populated areas in Cross River State. The growing population has increased demand for groundwater and led to indiscriminate sinking of boreholes without proper monitoring. In many communities, wells are located close to septic tanks, drainage channels, and dumpsites, increasing the risk of contamination. Seasonal flooding also contributes to the infiltration of pollutants into underground aquifers. This study therefore seeks to evaluate both the quality and availability of groundwater in Calabar South to provide data for effective water resource management.

1.2 Statement of the Problem

Access to clean and safe water is fundamental to human health, yet in Calabar South, many residents depend on groundwater of uncertain quality. The lack of regular testing and monitoring of borehole and well water has made it difficult to assess whether the water meets national and international drinking standards. There are growing concerns about the presence of contaminants such as nitrates, coliform bacteria, and heavy metals that pose serious health risks. Additionally, the rising number of boreholes in the area raises questions about groundwater availability and sustainability. If not properly managed, excessive extraction could lead to depletion of aquifers. This situation calls for a detailed evaluation of groundwater quality and availability in Calabar South.

1.3 Aim and Objectives of the Study

The main aim of this study is to evaluate the quality and availability of groundwater in Calabar South, Cross River State.

The specific objectives are to:

1. Assess the physicochemical and bacteriological characteristics of groundwater samples in the area.

2. Compare groundwater quality with national and WHO drinking water standards.

3. Examine the spatial variation of groundwater quality across selected communities.

4. Determine the factors influencing groundwater availability and sustainability in Calabar South.

1.4 Research Questions

1. What are the major physical and chemical properties of groundwater in Calabar South?

2. Does groundwater quality meet WHO and Nigerian drinking water standards?

3. How does groundwater quality vary across different parts of the study area?

4. What are the main factors affecting groundwater availability and sustainability?

1.5 Significance of the Study

This research will provide valuable data on groundwater quality and help raise public awareness about the importance of safe water sources. The findings will assist the Cross River State Water Board, environmental agencies, and health authorities in developing strategies for groundwater protection. It will also serve as a useful reference for urban planners and researchers working on sustainable water resource management. By identifying contamination sources, the study will contribute to improving community health and achieving the Sustainable Development Goal on clean water and sanitation.

1.6 Scope of the Study

The study focuses on the evaluation of groundwater quality and availability in Calabar South Local Government Area. It covers selected communities where boreholes and wells are common water sources. The research involves field sampling, laboratory analysis, and spatial mapping of groundwater characteristics using Geographic Information System (GIS).

1.7 Definition of Key Terms

• Groundwater: Water that exists beneath the Earth’s surface in soil and rock formations.

• Water Quality: The chemical, physical, and biological characteristics of water that determine its suitability for a particular use.

• Aquifer: A geological formation that can store and transmit groundwater.

• Contamination: The introduction of harmful substances into water, making it unsafe for use.

• Sustainability: The management of resources in a way that meets present needs without compromising future availability.