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The contamination of groundwater by natural arsenic is currently a worldwide epidemic. Arsenic-contaminated groundwater has been reported in Argentina, Chile, Mexico, China, Hungary, West Bengal in India, Bangladesh, and Vietnam. Of these regions, Bangladesh and West Bengal are the most seriously affected in terms of the size of the population at risk and magnitude of health problems. Hence, chronic exposure to arsenic >50′′μg/L in drinking water can result in serious health problems. Common symptoms of arsenic-related ailments are skin, cardiovascular, renal, hematological, and respiratory disorders. Therefore, this chapter focuses on nature, origin, and extent of groundwater arsenic contamination, probable causes, and its impacts on food, drinking water, and social coverage. It further discloses mitigation approaches proposed and practiced by the different research groups to combat this problem and finally concludes.

Millions of people in Southwestern Bangladesh drink groundwater that has arsenic contamination levels above both Bangladeshi and WHO standards. Thus, arsenic, the king of poisons, presents significant social problems in the rural communities of Bangladesh. Lacking arsenic-free drinking water, the local populations are most adversely affected. Arsenic contamination of drinking water and food is the main pathway by which arsenic enters people’s lives, producing diseases such as melanosis, keratosis, skin lesions, skin cancers, and kidney failure. Therefore, to cope with and alleviate arsenic poisoning, whatever adaptation and mitigation strategy is adopted, it should, however, start with and be led by the local community wherever possible for it is local villagers who are often the real experts on arsenic contamination. Rather than implementing highly technical, expensive, and outsider-led interventions that are often untried in field conditions, priority should be given to using modified traditional coping and mitigation mechanisms developed in the communities in Bangladesh. Hence, this chapter highlights first the extent of arsenic poisoning in the Southwestern part; its adverse impact on livelihood, water sector, and social aspect; and then the focus shifts to community-level mitigation strategy led by the people along with the assistance of GO and nongovernmental organization (NGO); and finally there is the conclusion along with recommendations.

The southwest coastal region is part of an inactive delta of large Himalayan rivers and is protected from tidal surge by the Sundarbans mangrove forest. This area is the hub of all types of disasters such as cyclones, tidal surges, floods, drought, salinity intrusions, repeated waterlogging, and land subsidence. Cyclonic tidal surges and floods are the more common disasters, and their effects are frequently experienced at the local level. But silent and invisible disasters such as increased salinity, arsenic contamination, and drought affect local livelihoods, people, and environments in this region. The vulnerability of southwest region to increased salinity, arsenic contamination, and drought are the result of a complex interrelationship among biophysical, social, economical, and technological characteristics of the country. Moreover, in the current and foreseeable future, the country is likely to be affected by the biggest, most long-lasting, and global scale but silent disaster: increased salinity, natural arsenic contamination, and drought. Therefore, this region is thought to be the most disaster-prone region in Bangladesh because of natural disasters and highly vulnerable to the effects of climate change.

Things seem to be going desperately wrong with the concept of the “brave new world” predicted by the starry‐eyed optimists after the Second World War finally came to an end. To those who listen only to what they want to hear, see everything, not as it is, but as they would like it to be, a new society could be initiated and the lusty infant would emerge as a paragon for all the world to follow. The new society in truth never really got off the ground the biggest mistake of all was to cushion millions of people against the results of their own folly; to shelter them from the blasts of the ensuing economic climate. The sheltered ones were not necessarily the ordinary mass of people; many in fact were the victims and suffered the consequences. And now that the state has reached a massive crescendo, many are suffering profoundly. The big nationalised industries and vast services, such as the national health service, education, where losses in the case of the first are met by Government millions, requests to trim the extravagant spending is akin to sacrilege in the latter, have removed such terms as thrift, careful spending, value for money from the vocabulary.

The consumption of rice that contains high levels of inorganic arsenic may cause human health risk. This study aims to determine As species concentrations, particularly iAs, in raw rice in Ho Chi Minh (HCM) City and its health risks.

A total of 60 polished raw composite samples of rice were purchased from traditional markets and supermarkets in HCM City. All samples were analyzed by HPLC-ICPMS for As species determination.

Mean concentrations of inorganic arsenic in all samples, which were purchased from supermarket and traditional market, were 88.8 µg/kg and 80.6 µg/kg, respectively. Overall, inorganic arsenic level was 84.7 µg/kg and contributed the highest proportion of arsenic species in rice with 67.7%. The proportion profiles for arsenic species were: As (III) (60 %); dimethylarsinic acid (32.2 %); As (V) (7.7 %) and methylarsonic acid (0.1 %). Inorganic arsenic level in raw rice was below the recommendation of World Health Organization. Using the benchmark dose recommended by the Joint FAO/WHO Expert Committee on Food Additives (JECFA), all exposure doses were lower than BMDL05. However, as the doses ranged from 3.0 to 8.6 of Margin of Exposure (MOE), the health risk of iAs from rice consumption remains public health concern.

The study results report on the surveillance data of the presence of inorganic arsenic in raw rice products, which are available in the supermarkets and traditional markets, and its health risk to consumers in a metropolitan city in Vietnam.

Access to pure drinking water is considered as a basic human right and part of the United Nations' Sustainable Development Goals. India ranks poorly in terms of providing universal coverage of potable water to its citizens. This case highlights the challenges faced by the private sector in providing purified drinking water for a diverse country like India with many geographical regions (and their corresponding water impurities) and differing levels of economic prosperity (making sustainability tougher for private companies) by focusing on Waterlife India Private Limited (WLIP). WLIP is a for-profit social enterprise that sells drinking water in rural hinterlands and urban slums at a very affordable price of US$0.006 per liter. Since its inception in 2008, WLIP has evolved to become a major player in the fragmented Indian affordable drinking water industry. Sustainability of the WLIP business model is based on a unique public–private partnership template in which three parties come together—a corporate sponsor who bears the cost of the water filtration equipment; community governance bodies like panchayats or municipalities, which give a sense of operational legitimacy to the model; and WLIP as the driving force of the network. This business model is unique for three reasons: suitable incentive mechanisms with proper alignment of interests among various stakeholders; optimization of the water-filtration plant equipment to community demand; and achieving the delicate balance between standardization of processes and customization in offerings to the operating context. Alignment of partner interest is the principal differentiator that also ensures accountability and impact.

This paper aims to review the known and anticipated medical geology problems in Ghana, to highlight the impact of some trace elements on human health and to reveal some essential aspects of medical geology on health.

Literature and empirical studies relating to medical geological issues in Ghana were reviewed. Secondary data were used in the present study such as case studies, reports, geological bulletins and published research studies.

High levels of heavy metals including arsenic, cadmium and mercury in gold extraction processes through artisanal small-scale mining have contributed to high concentrations of toxic elements in the environment. The distribution and availability of these elements in the environment are facilitated by the geological, chemical and local environmental activities that are irregularly spread exposing people mining areas to pollutions. Exposures to these elements in above and below baseline levels contributed to health implications including fluorosis, intellectual or developmental disability and death in some regions of Ghana. Cardiovascular and cerebrovascular diseases linked to mining activities were also presented in this study. Similarly, non-communicable diseases can affect many people if correct measures are not considered. Following the geometric increase in mining activities, it is anticipated that deleterious environmental and health impacts associated with mining may persist in mining areas in Ghana. Reported implications and continuous contamination of water bodies in mining areas could result in high pollution levels beyond treatment for human use or destroy aquatic habitats and aquatic lives through acid drainage. Above-threshold concentrations of heavy metals in soils could bio-accumulate in crops, and this could pose deleterious public health implications on consumers. Continuous effects posed on the environment and public health may prompt communities, regulatory institutions and government to reduce or ban mineral development.

This review has significantly revealed potential public health issues from the impact on the natural environment and recommends that medical geologists work together with medical workers to devise preventive and therapeutic techniques to address many geology-related-health issues in Ghana.

Arsenic contamination in shallow groundwater aquifers in the lower Gangetic basin constitutes a major health hazard in the Bengal basin extended over Bangladesh and India. It has been estimated that at least 35 million people in Bangladesh and 6 million people in India are severely affected by arsenic-contaminated water. More so, about 57 and 9 million people in Bangladesh and West Bengal, respectively, are exposed to arsenic-contamination risk. The use of hazardous, arsenic-bearing groundwater for drinking, cooking, and irrigation in West Bengal and Bangladesh has led to what has been described by the WHO as the worst case of mass poisoning in human history. In case of West Bengal, the problem of arsenic contamination was discovered in the 1980s; since then several mitigation measures were adopted by the provincial and federal governments, community organizations, and NGOs. Yet, poor infrastructural arrangements, dire poverty, lack of awareness, and education increased the risk of arsenic exposure over the decades. In this chapter, an effort has been made to critically analyze the extent of mitigation measures adopted so far in the state of West Bengal. It discusses in detail the chronological responses of the provincial government in arsenic risk mitigation, implementation of adopted mitigation measures, and the consequent response and actions of arsenic-affected communities in West Bengal. The chapter also highlights the emerging challenges of arsenic risk mitigation in West Bengal and proposes a “system-based” framework for risk mitigation.

The purpose of this paper is to examine the presence of geogenic contaminants in groundwater from shallow aquifers of the crystalline basement complex rocks of Ibadan south-western, Nigeria.

A total of 30 drinking water samples, (six samples each from the five major lithologic formations of the study area) were collected from hand dug wells during the rainy season. Atomic absorption spectrophotometry was used to determine concentrations of arsenic, iron and fluoride in drinking water samples and also concentrations of other chemical parameters that could affect the concentrations of the geogenic contaminants including pH, Ca, Mg, Na and SO₄2−. Descriptive statistics, multiple correlation and analysis of variance were used to examine the relationship between the geogenic contaminants and concentration of other chemical parameters while inverse distance weighting was used to produce risk maps.

The results showed Arsenic concentration exceeding the WHO recommended concentration for drinking water in all the samples within the area. Samples from 16.6 per cent of the wells exceeded the recommended limit for fluoride while iron was present in most of the samples within acceptable limits. The study also revealed no significant difference in concentration of contaminants between the geologic formations.

Geogenic contamination has been scarcely studied in Nigeria. This research, therefore, is a paradigm shift in the study of groundwater contamination which had been mainly focused on anthropogenic contaminants. The outcome of this research will engender policy makers and researchers to pay more attention to geogenic contamination than anthropogenic contaminants in Nigeria.

The purpose of this paper is to provide a solid understanding, policy and action recommendations to motivate and capacitate more cities to start such urban vulnerability processes and to guide them in their first steps in a direction which will more easily allow the direct use of vulnerability assessments for subsequent adaptation and resilience planning.

The methodology adopted for this assessment builds on several years of ICLEI's international experience in climate change adaptation work. It specifically draws on the urban vulnerability component of the ICLEI ACCCRN process, a toolkit developed with support from Asian Cities Climate Change Resilience Network program, by ICLEI South Asia in partnership with ICLEI Oceania. A participatory approach that includes all key stakeholders and builds on past or ongoing relevant work in the city, as well as draws on existing data sources were adopted in view of the limited timeframe of this study (five months). A stakeholder consultation methodology referred to as Shared Learning Dialogues (SLDs) was adopted to engage not only various departments within the city government but also other local stakeholders. SLDs facilitate multi dimensional information sharing with everyone contributing information and experiences, and everyone learning from the exchanges as well.

The critical impacts have been identified through a series of participatory learning processes which were corroborated with existing secondary data and baseline studies, where available. During SLD process, a timeline exercise was carried out and the consequences of those climatic hazards were also chalked out. Subsequently, these identified impacts were justified broadly with the available data and studies. These are saline water intrusion, loss of assets and infrastructure, health impacts – increased morbidity, water supply contaminated, sanitation and drainage systems disrupted, heightened threat situation (fear of embankment breach), in-migration, increasing siltation in the canals, river bank encroachment, livelihood change, biodiversity loss.

The resilience interventions identified by the stakeholders can be assessed for potential linkages with existing or planned schemes, followed by supporting sectoral and pre-feasibility studies, resulting finally in the identification of financing options. These actions can be focussed on the vulnerable areas within the cities, especially hotspots, and social groups identified and their adaptive capacities were assessed.

The resilience interventions identified by the stakeholders provides a focussed starting point for further discussion in terms of refinement of these actions as well their prioritization according to resilience and feasibility (economic, social, environmental) criteria.