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Nitrate pollution of groundwater by pit latrines in developing countries

1 Department of Civil and Environmental Engineering, Imperial College London, London, United Kingdom SW7 2AZ;
2 Département des Sciences de la Terre, Université d'Abomey-Calavi, Cotonou, Bénin 01 BP 4521;
3 Département de Géologie, Université Cheikh Anta Diop, Dakar, Sénégal PO Box 5005;
4 Département des Sciences et Techniques de l'Eau et du Génie de l'Environnement, Université Félix Houphouët-Boigny, Abidjan, Côte d'Ivoire 22 BP 582

Special Issues: Pollution and Chemicals in the Environment

Pit latrines are one of the most common forms of onsite sanitation facilities in many developing countries. These latrines are suitable as a means of isolating human waste, however, conditions within pits often lead to nitrification of the contained waste. In areas with a near-surface aquifer, the potential for nitrate pollution arising from pit latrines cannot be ignored. In this study, site visits were made to three densely populated, peri-urban areas near three West African cities (Dakar, Abidjan, Abomey-Calavi) to gather relevant information about the latrines in use and the soil and groundwater underneath the sites. Modelling was then conducted to demonstrate the potential for nitrate pollution of the groundwater from the latrines in such settings. The depth from the bottom of the pits to the water table was considered as 5, 10 or 30 m, to represent the range of aquifer depths at the study sites. Nitrate half-lives ranging from 500 to 1500 days were considered, and time scales from 6 months to several years were modelled. The results highlighted the high likelihood of nitrate pollution of groundwater reaching levels exceeding the World Health Organization guideline value for nitrate in drinking water of 50 mg/L after as short a period as two years for the aquifer situated 5 m below the pits, when considering moderate to long nitrate half-lives in the subsurface. Careful siting of latrines away from high water table areas, more frequent pit emptying, or switching to urine diversion toilets may be effective solutions to reduce nitrate passage from pit latrines into groundwater, although these solutions may not always be applicable, because of social, technical and economic constraints. The study highlights the need for more reliable data on the typical nitrate concentrations in pit latrines and the nitrate half-life in different subsurface conditions.
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Keywords nitrate; groundwater; latrine; sanitation; pollution; modelling

Citation: Michael R. Templeton, Acile S. Hammoud, Adrian P. Butler, Laura Braun, Julie-Anne Foucher, Johanna Grossmann, Moussa Boukari, Serigne Faye, Jean Patrice Jourda. Nitrate pollution of groundwater by pit latrines in developing countries. AIMS Environmental Science, 2015, 2(2): 302-313. doi: 10.3934/environsci.2015.2.302


  • 1. World Health Organization, Fact Sheet 3.4: Simple Pit Latrines, undated. Available from: http://www.who.int/water_sanitation_health/hygiene/emergencies/fs3_4.pdf.
  • 2. Environment Agency, Attenuation of nitrate in the subsurface environment, 2005. Available from: https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/291473/scho0605bjcs-e-e.pdf
  • 3. Harman J, Robertson WD, Cherry JA, et al. (1996) Impacts on a sand aquifer from an old septic system: nitrate and phosphate. Ground Water 34: 1105-1114.    
  • 4. World Health Organization, Nitrate and nitrite in drinking-water, 2001. Available from: http://www.who.int/water_sanitation_health/dwq/chemicals/nitratenitrite2ndadd.pdf.
  • 5. Dovonou FE (2012) Diagonostic Qualitatif et Environnemental de l'Aquifere Superficiel du Champ de Captage Intensif de Godomey au Benin (Afrique de l'Ouest): Elements Pour un Plan d'Actions Strategiques de Protection des Resource en Eau Souterraine Exploitees, PhD thesis, Université d'Abomey-Calavi.
  • 6. Kouame KJ (2007) Contribution a la Gestion Integree des Ressources en Eaux (GIRE) du District d'Abidjan (Sud de la Cote d'Ivoire): Outils d'aide a la decision pour la prevention et la protection des eaux souterraines contre la pollution, PhD thesis, Université Félix Houphouët-Boigny.
  • 7. Shamrukh M, Corapcioglu M, Hassona F (2001) Modelling the effect of chemical fertilizers on ground water quality in the Nile Valley Aquifer, Egypt. Ground Water 39: 59-67.    
  • 8. Almasri MN, Kaluarachchi JJ (2007) Modeling nitrate contamination of groundwater in agricultural watersheds. J Hydrol 343: 211-229    
  • 9. Lee MJ, Hwang S, Ro HM, (2014) Interpreting the effect of soil texture on transport and removal of nitrate-N in saline coastal tidal flats under steady-state flow condition. Contin Shelf Res 84: 35-42.    
  • 10. Schouw NL, Danteravanich S, Mosbaek H, et al. (2002) Composition of human excreta - a case study from Southern Thailand. Sci. Tot. Environ. 286: 155-166.    
  • 11. Del Porto D, Steinfeld C (1999) The Composting Toilet System Book, a Practical Guide to Choosing, Planning and Maintaining composting Toilet Systems, a Water-Saving, Pollution-Preventing Alternative, Concord, Massachussetts, The Center for Ecological Pollution Prevention.
  • 12. Drangert JO, Bew J, Winblad U (1997) Ecological Sanitation, Proceedings of the Sida Sanitation Workshop, Balingsholm, Sweden, Sida.
  • 13. Aillery M, Gollehon, N, Johanson R, et al., Managing Manure to Improve Air and Water Quality, Economic Research report 9, United States Department of Agriculture, 2005. Available from: http://www.ers.usda.gov/media/851714/err9.pdf
  • 14. Cruz MC, Cacciabiu DG, Gil JF, et al. (2012) The impact of point source pollution on shallow groundwater used for human consumption in a threshold country. J Environ Monit 14: 2338-2349.    
  • 15. Kimmel GE (1984) Non-point contamination of groundwater on Long Island, New York. In: National Research Council (ed.) Groundwater contamination. Washington, National Academy Press, 120-126.
  • 16. Frind E, Duynisveld W, Strebel O, et al. (1990) Modeling of multicomponent transport with microbial transformation in ground water: the Fuhrberg case. Water Resour Res 26: 1707-1719.
  • 17. Herbert M, Kovar K (1998) Groundwater Quality: Remediation and Protection. Wallingford, International Association Hydrological Sciences.
  • 18. Adadzi PC (2012) Deep Row Trenching of Pit Latrine and Waste Water Treatment Works Sludge: Water and Nutrient Fluxes In Forest Plantations. MSc Dissertation. School of Agricultural, Earth and Environmental Sciences, University of KwaZulu-Natal.
  • 19. Heatwole KK, McCray JE (2007) Modeling potential vadose-zone transport of nitrogen from onsite wastewater systems at the development scale. J. Contam. Hydrol., 91: 184-201.    
  • 20. Simunek J, van Genuchten MT, Sejna M (2006). The HYDRUS Software Package for Simulating Two- and Three- Dimensional Movement of Water, Heat, and Multiple Solutes in Variably-Saturated Media, Technical Manual, Version 1.0, PC Progress, Prague, Czech Republic, 241.
  • 21. ARGOSS (2001) Guidelines for assessing the risk to groundwater from on-site sanitation. British Geological Survey Commissioned Report, CR/01/142. 97.
  • 22. ARGOSS (2002) Assessing Risk to Groundwater from On-site Sanitation: Scientific Review and Case Studies British Geological Survey Commissioned Report, CR/02/079N. 105.
  • 23. Butler AP, Brook C, Godley A, et al. (2003) Attenuation of landfill leachate in unsaturated sandstone. Proceedings of the Ninth International Waste Management and Landfill Symposium, Sardinia, October 2003.
  • 24. van Genuchten MT, Alves WJ (1982) Analytical solution of the one-dimensional convective-dispersive solute transport equation, Tech. Bull. U.S. Dep. Agric., 1661.
  • 25. Thye YP, Templeton MR, Ali M (2011) A critical review of technologies for pit latrine emptying in developing countries. Crit Rev Environ Sci Technol 41: 1793-1819.    


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Copyright Info: 2015, Michael R. Templeton, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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