Noise Pollution Mapping Using GIS in Nairobi, Kenya


Noise is any sound that causes physiological uneasiness to the ear. People in many environments today, especially urban ones, are exposed to such noise without realizing its potential danger to their healthy hearing. This situation is largely contributed to by the little attention that most governments, especially in the developing countries, pay to noise as a pollution issue. This paper describes a study that aimed at measuring the noise levels at selected points in Nairobi’s CBD with a view to generate a noise map over the study area in addition to identifying areas of high noise intensity or noise hot spots. The study found that noise levels, on average, varied from 61 db to 78 db, increasing from the west to the east of the CBD, and emanated mainly from vehicular traffic; several noise hotspots were also identified, and they are located mainly to the east of the CBD. The paper concludes that although the study was not city-wide, the noise levels observed are high enough to warrant further research and action by the environmental authorities.

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Wawa, E. and Mulaku, G. (2015) Noise Pollution Mapping Using GIS in Nairobi, Kenya. Journal of Geographic Information System, 7, 486-493. doi: 10.4236/jgis.2015.75039.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Government of Kenya (1999) The Environmental Management and Coordination Act. Laws of Kenya.
[2] Mulaku, G.C. (2000) Setting up a Land Information System: A Systematic Approach. South African Journal of Surveying and Geoinformation, 1, 260-264.
[3] WHO (2009) Night Noise Guidelines for Europe. World Health Organization, Geneva, Chapter 4, 61-77.
[4] Berglund, B., Lindvall, T. and Schwela, D. (1999) Guidelines for Community Noise. World Health Organisation, Geneva, 121.
[5] EU (1993) The Fifth Environmental Action Programme of the EU. Official Journal of the European Communities, No. C 138.
[6] EU (2002) The European Union Directive 2002/49/EC of the European Parliament and the Council. Official Journal of the European Communities.
[7] Gholami, A., Parvin, N., Monazzam, M., Alireza, G., Monavvari, S. and Ali, A. (2012) Evaluation of Traffic Noise Pollution in a Central Area of Tehran through Noise Mapping in GIS. Advances in Environmental Biology, 6, 2365-2371.
[8] Government of Kenya (2008) Kenya Vision 2030: A Globally Competitive and Prosperous Kenya. National Economic and Social Council (NESC), Nairobi.
[9] Government of Kenya (2009) Kenya National Bureau of Statistics Census Report. Volume Ib, 18.
[10] Osha (2015) Website of the Occupational Safety and Health Administration (USA).

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