Assessment of Physico-chemical and Bacteriological Quality of Drinking Water Sources in Kakamega County, Kenya
Ernest Othieno Odwori *
Department of Water, Environment and Natural Resources, Kakamega County, Kenya.
Jacob Wanambacha Wakhungu
Department of Disaster Management and Sustainable Development, Masinde Muliro University of Science and Technology, Kakamega, Kenya.
*Author to whom correspondence should be addressed.
Abstract
Water-borne diseases still present a major health burden in Africa. Large segments of the rural population here have no access to potable water. This study has been designed to assess the physico-chemical and bacteriological quality of drinking water sources in the study area. The study was conducted in Kakamega county covering the twelve sub-counties of Likuyani, Lugari, Malava, Navakholo, Lurambi, Ikolomani, Shinyalu, Mumias East, Mumias West, Matungu, Butere and Khwisero. Socio-demographic characteristics of the study populations were captured using a structured pre-tested questionnaire. The Most Probable Number (MPN) method was used to determine the abundance of Total coliforms and Escherichia coli (E. coli) in the water samples collected. Physico-chemical analyses (Temperature, pH, Electrical conductivity, Total dissolved solids and Dissolved oxygen) were carried out. Free residual chlorine was determined by colorimetric method with DPD chlorine tablets. The analyses were conducted following guidelines of American Public Health Association and WHO. Only 17% (68/400) of the study population had access to piped water in the study area. Waste management practices of the localities was found poor as more than 62 % (248/400) of the respondents dispose waste materials in open fields. All drinking water sources investigated were contaminated with Total coliforms. There was a wide variation in Total coliforms and E. coli. Total coliform counts ranged from 0.0 - 3652.5 cfu/100 ml whereas E. coli ranged from 0.0 - 33.0 cfu/100 ml. Both Rivers/streams and unprotected dug wells recorded the highest number of Total coliforms and E. coli. Piped water, Rainwater collection and Boreholes recorded the lowest number of Total coliforms and E. coli. E. coli counts in most drinking water sources investigated exceeded the maximum permissible limits set by WHO/KEBS, implying that they are not safe for household applications without prior treatment. The results indicate that protected drinking water sources (piped water, boreholes, protected dug wells and protected springs) are subjected to a high level of fecal contamination in the study area. Construction flaws on casing, concrete covers, fences, diversion ditches, and protection of springs' eyes and other plumbing accessories could be one of the causes. Protected water sources may become contaminated for other reasons, such as a lack of frequent surveillance, disinfection, and correct maintenance. Poor sanitation practices, a lack of hygiene education, poor supervision and maintenance, and inconsistent water point disinfection can all be blamed for the high levels of E. coli. The recorded temperature and pH ranged between 19.9–27.2°C and 4.8 - 9.1, respectively. Turbidity and Electric conductivity of the water samples ranged, respectively, between 0.43–467.02 NTU and 18.7–510.7 μS/cm. Residual chlorine in piped water showed a range of 0.06-1.2 ppm. In addition, Total dissolved solids were found to be between 20.1 and 639.2 mg/l; whereas Dissolved oxygen ranged from 2.2- 15.4 mg/l. The results of the current investigation showed that some bacteriological and physico-chemical parameters of the various water sources had values above the maximum permissible limits advised by WHO/KEBS. The Water sector stakeholders in the area should put in place proper intervention measures which include raising public awareness on the water quality of drinking water sources and enhancing the current infrastructure in order to reduce any potential health hazards.
Keywords: Kakamega county, physico-chemical and bacteriological analysis, drinking water sources
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References
WHO. Water-related diseases. World Health Organization, Geneva; 2014.
UNICEF/WHO. Progress on sanitation and drinking water 2015 update and MDG assessment. World Health Organization, Geneva; 2015.
WHO. Drinking-water fact sheet N°391. World Health Organization, Geneva; 2015.
GOK, First Medium Term Plan (2008-2012).Government printers, Nairobi; 2008.
Josephine T. Drinking water treatment and challenges in developing countries, the relevance of hygiene to health in developing countries, Natasha Potgieter and Afsatou Ndama Traore Hoffman. Intech Open; 2019.
Daud MK, Nafees M, Ali S, Rizwan M, Bajwa RA, Shakoor MB, Arshad MU, Chatha SA, Deeba F, Murad W, Malook I. Drinking water quality status and contamination in Pakistan. BioMed Res. Int; 2017.
Adane JM. Mengistie B, Kloos H, Medhin G, Mulat W. Sanitation facilities, hygienic conditions, and prevalence of acute diarrhea among under-five children in slums of Addis Ababa, Ethiopia: baseline survey of a longitudinal study. PloS One. 2017;12(8).
Chalchisa D, Megersa M, Beyene A. Assessment of the quality of drinking water in storage tanks and its implication on the safety of urban water supply in developing countries, Environ. Syst. Res. 2018;6(1):1–6.
KNBS. Kenya National Bureau of Statistics. 2019 Kenya Population and Housing Census Report, Nairobi, Kenya; 2019.
APHA. Standard methods for the examination of water and wastewater, 22nd edition. American Public Health Association, American Water Works Association and Water Environment Federation, Washington, DC; 2012.
Water Watch Australia Steering Committee. Water Watch Australia National Technical Manual. Environment Australia; 2002.
WHO. Guidelines for drinking-water quality, 4th edn. World Health Organization, Geneva; 2011.
KEBS. KS05-459-1, Drinking Water. Specification Part 1; the Requirements for Drinking Water (ICS 13.060.20), third ed., KBS, Nairobi; 2010.
APHA. Standard methods for the examination of water and wastewater, 19th edn. American Public Health Association, Washington, DC; 1998.
Lukubye B, Andama M. Bacterial analysis of selected drinking water sources in Mbarara Municipality, Uganda. Journal of Water Resource and Protection. 2017;9(8):999-1013.
World Health Organisation. World Health Organisation Guidelines for Drinking Water World Health Organisation Press, Geneva; 1996.
WHO. Technical Support Document for Ontario Drinking Water Standards, Objectives and Guidelines. World Health Organisation Press, Geneva; 2003.
Ondieki JK, Akunga DN, Warutere PN, Kenyanya O. Bacteriological and physico-chemical quality of household drinking water in Kisii Town, Kisii County, Kenya. Heliyon. Science Direct. 2021;7.
Perlman H. Water properties and measurements. In USGS Water Science School; 2014.
Ogendi GM, Getabu AM, Onchieku JM, Babu JM. An assessment of some physical, chemical and biological characteristics of Nyanchwa–Riana river flowing through Kisii town in South West Kenya. Int. J. Appl. Sci. Technol. 2015;5(2):68–79.
Nishtha K, Lokhande RS, Dhar JK. Physico-chemical, bacteriological and pesticide analysis of tap water in Millennium City Gurgoan, Haryana, India. Int Res J Environ Sci. 2012;1(2):1–7.
WHO. pH in Drinking Water. Background document for development of WHO Guidelines for drinking water quality. World Health Organization, 20 Avenue Appia, 1211 Geneva 27, Switzerland; 2003.
Sabrina S, Daniela P, Joseph M, Sieliechi M, Ngassoum B. Assessment of physical-chemical drinking water quality in the Logone Valley (Chad-Cameroon). Sustainability. 2013;5:3060–3076.
Napacho ZA, Manyele SV. Quality assessment of drinking water in Temeke District (part II): Characterization of chemical parameters. African Journal of Environmental Science and Technology. 2010;4(11):775–789.
Chang H. Spatial analysis of water quality trends in the Han River basin, South Korea. Journal of Water Research. 2008;42(13):3285–3304.
Lukubye B, Andama M. Physico-chemical quality of selected drinking water sources in Mbarara Municipality, Uganda. Journal of Water Resource and Protection. 2017;9:707-722.
Bridge J, Demicco R. Earth surface processes, landforms and sediment deposits. Cambridge University Press, Cambridge; 2008.
Dincer I, Rosen MA. Exergy: Energy, environment and sustainable development. Elsevier Science Publishers, Amsterdam; 2007.
Deas ML, Orlob GT. Klamath river modelling project. University of California, California; 1999.
Byamukama D, Kansiime F, March RL, Farnleitner H. Determination of Escherichia coli contamination with chromocult coliform agar showed a high level of discrimination efficiency for differing fecal pollution levels in tropical waters of Kampala, Uganda. Applied and Environment Microbiology. 2000;66:864-868.
Haruna R, Ejobi F, Kabagambe EK. The quality of water from protected springs in Katwe and Kisenyi Parishes, Kampala City, Uganda. African Health Sciences. 2005;5:14-20.
Karanth KR. Ground Water Assessment Development and Management. McGraw Hill Publishing Company Ltd., New Delhi; 1987.
Tiwari AK, Singh AK, Singh AK, Singh MP. Hydrogeochemical analysis and evaluation of surface water quality of Pratapgarh district. Appl Water Sci, Uttar Pradesh; 2015.
Singh PK, Tiwari AK, Panigarhy BP, Mahato MK. Water quality indices used for water resources vulnerability assessment using GIS technique: A review. Int J Earth Sci Eng. 2013;6(6–1):1594–1600.
Tiwari AK, Singh AK. Hydrogeochemical investigation and groundwater quality assessment of Pratapgarh district, Uttar Pradesh. J Geol Soc India. 2014;83(3):329–343.
Keya WJ. Microbial and physicochemical parameters of River Kuywa water in Bungoma County, Kenya. Msc Thesis, Maseno University, Maseno, Kenya; 2019.
Otieno OS. Physico-chemical and bacteriological quality of water from five rural catchment areas of Lake Victoria Basin in Kenya Msc Thesis, Kenyatta University, Kenya; 2015.
Okot-Okumu, Otim JJ. The quality of drinking water used by the communities in some regions of Uganda . Int. J. Biol. Chem. Sci. 2015;9(1):552-562.
Adika AC, Kibet JK, Kiprop AK, Munyendo LW. The assessment of bore hole water quality of Kakamega County, Kenya. Applied Water Science. 2018;8:47.
Sila ON. Physico-chemical and bacteriological quality of water sources in rural settings, a case study of Kenya, Africa. Scientific Africa. 2019;(2).
Haruna R, Ejobi F, Edmond K, Kabagamb EF. The quality of water from protected springs in Katwe and Kisenyi parishes, Kampala city, Uganda. African Health Sciences. 2005;5(1):14-20.
Tenge JW, Lusweti JK, Ng’wena AG. Assessment of drinking water quality from the Malakisi River in Western Kenya. International Journal of Innovative Research & Development. 2015;4(4).
Yasin M, Ketema T, Bacha K. Physico-chemical and bacteriological quality of drinking water of different sources, Jimma zone, Southwest Ethiopia. BMC Res. Notes 2015;8(1):541.
Ouma SO. Physicochemical and bacteriological quality of water from five rural catchment areas of Lake Victoria Basin, Kenya. MSc. thesis, Kenyatta University, Kenya; 2015.
Kiruki S, Limo KM, Njagi ENM, Paul OO. Bacteriological quality and diarrhoeagenic pathogens on River Njoro and Nakuru Municipal water, Kenya. International Journal for Biotechnology and Molecular Biology Research. 2011;2(9):150-162.
Lavoie MC, Viens P. Water quality control in rural Ivory Coast. Trans. R. Soc. Trop. Med. Hyg. 1983;77(1):119–120.
Lloyd BJ, Bartram JK. Surveillance solutions to microbiological problems in water quality control in developing countries. Water Sci. Technol. 1999;24(2):61–75.
Lloyd B, Helmer R. Surveillance of drinking water quality in rural areas. Longman Scientific & Technical on behalf of the World Health Organisation and the United Nations Environment Programme, Harlow; 1999.
Sutton SE. Microbial quality of groundwater supplies in rural Zambia. In Groundwater Quality (ed. H. Nash & G. J. H. McCall), Chapman and Hall, London. 1994:139–144.
Magrath J. Towards sustainable water supply solutions in rural Sierra Leone. Oxfam Research Report; 2006.
Karikari A, Ondi D. An assessment of water quality of Angaw River in South-Eastern Coastal Plains of Ghana. CSIR-Water Research Institute. 2004;95:23-36.
Parihar S, Kumar A, Kumar A, Gupta RN, Pathak M, Shrivastav A, Pandey AC. Physico-chemical and microbiological analysis of underground water in and around Gwalior City, MP, India. Research Journal of Recent Science. 2012;1:62-65.
Mohan D, Gaur A, Chodhary D. Study of limnology and microbiology of Naya Talab, Jodhpur, Rajasthan. Proceedings of National Symposium on Limnology. 2007:64-68.
Caircross S, Cliff JL. Water use and health in Mireda, Mozambique. Trans. Royal Society. Tropical Medical Hygeine. 1987;81:51-54.
Umar AK, Ntiamoa-Baidu Y, Ampofo JA, Adaboh RK. Nitrate, chloride and calcium contamination of hand-dug well water from household pit-latrine in Asamankese, Eastern Ghana. Universal Journal of Chemistry. 2008;3(1):1-9.
Ashour AJ, Hung L. Transport of bacteria on sloping soil surfaces by runoff. Environmental Toxicology. 2000;15(2):149-1.