Chapter One — 1.1 Background to the Study

Lagos's designation as a British colony in 1861 initiated nearly a century of urban expansion built around its function as a lagoon port — first as the administrative and commercial centre of the Colony of Lagos, and subsequently as the capital of the wider Nigerian colonial territory. That expansion was inseparable from the physical geography of the lagoon itself: harbour improvement, land reclamation along the foreshore, and the growth of wharves, markets and residential districts all involved direct, sustained intervention in the lagoon and coastal waters that gave the town its economic reason for existing.

Environmental historians of colonial West Africa have increasingly examined how colonial urban administration shaped the ecological conditions of the cities it governed, but marine and coastal pollution specifically has received less sustained attention than land-based environmental change such as deforestation or agricultural policy. Lagos presents a particularly clear case for this kind of study precisely because its urban and commercial life were so directly organised around the lagoon: the same waters that carried the port's trade also received the township's expanding waste, and colonial administrative records — however incidental their references to water quality — offer a documentary basis for tracing how that relationship changed over the better part of a century.

1.2 Statement of the Problem

Existing historical accounts of colonial Lagos have examined its urban planning, its commercial development, and its administrative governance in considerable depth, but the environmental consequences of that urbanisation for the lagoon and coastal waters the town depended upon have not been reconstructed as a connected historical narrative in their own right. Colonial administrative sources touch on land reclamation, harbour works, and sanitation intermittently and for varied administrative purposes, without those references having been assembled into an account of how marine pollution accumulated alongside urban growth across the colonial period. This study addresses that gap, tracing the relationship between urbanisation and marine pollution in Lagos from the establishment of colonial rule in 1861 through to independence in 1960.

1.3 Objectives of the Study

1. To examine how colonial-era land reclamation and harbour development altered the physical and ecological condition of the Lagos lagoon and adjacent coastal waters.
2. To trace the growth of effluent discharge from commercial, industrial and residential sources into the lagoon across the colonial period.
3. To analyse how colonial administrative and town planning bodies understood and responded to evidence of water quality degradation, where such evidence appears in the historical record.
4. To situate Lagos's experience within the wider pattern of colonial urban governance and its treatment of environmental consequences as secondary to commercial and administrative priorities.
5. To assess what environmental starting conditions this century of urbanisation left the city with at the point of Nigerian independence in 1960.

1.4 Research Questions

1. How did colonial-era land reclamation and harbour development alter the physical and ecological condition of the Lagos lagoon and adjacent coastal waters between 1861 and 1960?
2. How did effluent discharge from commercial, industrial and residential sources into the lagoon change across the colonial period?
3. How did colonial administrative and town planning bodies understand and respond to evidence of water quality degradation, where it appears in the historical record?
4. What environmental starting conditions did this pattern of urbanisation leave Lagos with at independence in 1960?

1.5 Significance of the Study

This study contributes to the environmental history of colonial West Africa by reconstructing a dimension of Lagos's urban development — marine and coastal pollution — that existing accounts of the city's colonial history have not treated as a connected historical process in its own right. It is also significant to the wider historiography of Lagos and the Niger Delta coastal region, offering a documentary basis for understanding the environmental origins of water quality and coastal management challenges the city has continued to face well beyond the colonial period, and for historians examining how colonial administrative priorities shaped the environmental inheritance of the cities they governed.

1.6 Scope of the Study

The study is confined to the period between the British annexation of Lagos in 1861 and Nigerian independence in 1960, and to the lagoon and immediately adjacent coastal waters rather than the wider Niger Delta coastline. It draws on colonial administrative correspondence, Lagos Town Council and marine/harbour department records, and contemporary press accounts available for this period, and does not extend to a scientific reconstruction of historical water chemistry, for which the surviving documentary record does not provide adequate evidence, nor to the post-independence period beyond what is needed to characterise the environmental conditions inherited at 1960.