Environment and Ecology Research 9(6): 426-446, 2021 http://www.hrpub.org DOI: 10.13189/eer.2021.090609 Geospatial Assessment of Ambient Air Quality Footprints in Relation to Urban Landuses in Nigeria Josiah Nwabueze Obiefuna 1,* , Ebin Okah Inah 1 , Joy William Undie Atsa 2 , Emmanuel Asuquo Etim 3 1 Department of Geography and Environmental Science, Faculty of Environmental Sciences, University of Calabar, P.M.B. 1115, Calabar, Nigeria 2 Department of Environmental Resource Management, Faculty of Environmental Sciences, University of Calabar, P.M.B. 1115, Calabar, Nigeria 3 Department of Geography, School of Arts and Social Sciences, Cross River State College of Education, Akamkpa, CRS, Nigeria * Corresponding Author: JoeObiefuna@Gmail.com Received November 5, 2021; Revised December 8, 2021; Accepted December 29, 2021 Cite This Paper in the following Citation Styles (a): [1] Josiah Nwabueze Obiefuna, Ebin Okah Inah, Joy William Undie Atsa, Emmanuel Asuquo Etim , "Geospatial Assessment of Ambient Air Quality Footprints in Relation to Urban Landuses in Nigeria," Environment and Ecology Research, Vol. 9, No. 6, pp. 426 - 446, 2021. DOI: 10.13189/eer.2021.090609. (b): Josiah Nwabueze Obiefuna, Ebin Okah Inah, Joy William Undie Atsa, Emmanuel Asuquo Etim (2021). Geospatial Assessment of Ambient Air Quality Footprints in Relation to Urban Landuses in Nigeria. Environment and Ecology Research, 9(6), 426 - 446. DOI: 10.13189/eer.2021.090609. Copyright©2021 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Ambient air pollution is a global concern. It accounts for an estimated 4.2 million deaths yearly as a result of its ability to cause stroke, lung cancer, heart disease and chronic respiratory diseases. It has also been estimated that about 91 percent of the world’s population lives in places, mostly urban centres, where air quality levels exceed World Health Organization (WHO) limits. Fortunately, efforts are regularly made in most developed countries to monitor and reduce the level of air pollution and ameliorate its negative consequences. Unfortunately, the case is not the same in most developing countries of which Nigeria is a member, as air pollution status is rarely monitored religiously. This study geospatially assessed ambient air quality footprints vis-à-vis urban land uses in Calabar Metropolis, Nigeria. Data on emission level of CO, NO 2 , SO 2 , H 2 S, and SPM 2.5 were collected for 6 months in both dry and wet seasons in the year 2020, using Crowcon Gasman, while point coordinates were collected using Garmin GPSMap 60CSx device. Geographic Information Systems (GIS) infrastructure was deployed to generate the ambient air quality maps for the metropolis. Descriptive and parametric analytical techniques were also deployed, based on the objectives of the study. From findings, F-ratio is significant for both season and land use for all the tested parameters (F-ratio for season is F(1,3224)=574.516, at p<0.05, while for land use, F(3,3224)=429.946, at p<0.05). The interaction between seasons and land use (season * land use) for all the parameters is also significant. It was concluded that there is a significant variation in air quality (CO, NO 2, SO 2, H 2 S, and SPM 2.5 ) in Calabar Metropolis in relation to either land use types or seasons of the year. It was therefore recommended that there should be protection of residential land uses to avoid encroachment by incompatible uses that cause pollution. Keywords Geospatial, Air Quality, Footprints, Urban Land Uses, Environmental Pollution 1. Introduction Every piece of land has a use to which it must be put depending on its natural endowment and profitability. This is termed landuse. Again, land use is the ordered arrangement of socio-economic activities and inputs on a certain land cover type to produce change or maintain it [1]. In a broad perspective, land use is the classification and location of physical structures and conforming activities within a defined region [2]. Land use provides a more livable community to the residents and the work force in a defined urban area. A well organised land use enhances, on a long-term basis, the economic climate as well as green and clean urban areas. It also preserves natural heritage, optimizes recreation and eliminates congestion occasioned by vehicular activities.