Physical-Chemical Water Quality Asessment of Rivers within the Athi River Basin Area, Kenya
DOI:
https://doi.org/10.2200/aerj.v5i2.258Keywords:
Physical-Chemical, Surface Water, Athi Basin, Wastewater, Pollution, Water QualityAbstract
One of the main issues affecting Kenya's management of its water resources is pollution. In this study, selected physical-chemical characteristics were used to evaluate the river water quality in the Athi Basin area. Standard techniques for examining water and wastewater were used to examine the parameters. The pH (6.4 to 8.5) was generally in compliance with portable water regulations, despite the temperature varying between 20.4℃ and 27.8℃. The electrical conductivity (EC) ranged from 70 µS/cm to 1750 µS/cm while total dissolved solids (TDS) recorded concentration ranging from 43 mg/L to 1085 mg/L. Total suspended solids (TSS, 10 - 233 mg/L), Biochemical oxygen demand (BOD, 1 - 600 mg/L) and chemical oxygen demand (COD, 13-1000 mg/L) wide range of concentrations was observed. Other factors that are assessed are sulphide (<1-6 mg/L), nitrate (ND - 36 mg/L), orthophosphate (7 -18 mg/L) and Ammonia (0.31-52 mg/L). The greatest concentration values were found at sampling locations in informal settlements, indicating direct residential wastewater flow into river systems. The results also suggest that the basin may have been contaminated by industrial and agricultural operations. Some physical-chemical characteristics, such as BOD and COD concentrations, in effluent samples that the wastewater treatment facilities released into the rivers were greater than the KEBS and WHO permissible thresholds, suggesting that they were unfit for domestic consumption, especially drinking. Therefore, more effort should be made by the concerned government departments and organizations to solve the problems with pollution in the basin.
References
Agency, U. S. E. P. (2020). Fresh Surface Water | US EPA. United States Environmental Protection Agency. https://www.epa.gov/report-environment/fresh-surface-water
Alam, M. J. B., Islam, M. R., Muyen, Z., Mamun, M., & Islam, S. (2007). Water quality parameters along rivers. International Journal of Environmental Science and Technology, 4(1), 159–167. https://doi.org/10.1007/BF03325974
APHA (2017). Standard Methods for the Examination of Water and Wastewater (23rd ed.). Washington DC: American Public Health Association.
Bekele, M., Dananto, M., & Tadele, D. (2018). Assessment of Physico-Chemical and Bacteriological Quality of Drinking Water at the Source , Storage , Point-of-Use , Dry and Wet Season in Damot Assessment of Physico-Chemical and Bacteriological Quality of Drinking Water at the Source , Storage , Point-. 1(February 2019), 26–38.
Bijay-Singh & Craswell, E. (2021). Fertilizers and nitrate pollution of surface and ground water: an increasingly pervasive global problem. SN Applied Sciences, 3(4), 1–24. https://doi.org/10.1007/s42452-021-04521-8
Braga, F. H. R., Dutra, M. L. S., Lima, N. S., da Silva, G. M., de Miranda, R. de C. M., Firmo, W. da C. A., de Moura, A. R. L., Monteiro, A. de S., da Silva, L. C. N., da Silva, D. F., & Silva, M. R. C. (2022). Study of the Influence of Physicochemical Parameters on the Water Quality Index (WQI) in the Maranhão Amazon, Brazil. Water (Switzerland), 14(10), 1–13. https://doi.org/10.3390/w14101546
Brandi, J., & Wilson-Wilde, L. (2013). Standard Methods. Encyclopedia of Forensic Sciences: Second Edition, 522–527. https://doi.org/10.1016/B978-0-12-382165-2.00237-3
du Plessis, A. (2017). Global water availability, distribution and use. In Freshwater Challenges of South Africa and its Upper Vaal River (pp. 3-11). Springer, Cham.
Chebet, E. B., Kibet, J. K., & Mbui, D. (2020). The assessment of water quality in river Molo water basin, Kenya. Applied Water Science, 10(4), 1–10. https://doi.org/10.1007/s13201-020-1173-8
Data Stream. (2021). Total Suspended Solids (TSS) and Total Dissolved Solids (TDS).
https://datastream.org/en/guide/total-suspended-solids-and-total-dissolved-solids
Denchak, M. (2018). Water Pollution Facts, Types, Causes and Effects of Water Pollution | NRDC. https://www.nrdc.org/stories/water-pollution-everything-you-need-know
Dirisu, C. G., Mafiana, M. O., Dirisu, G. B., & Amodu, R. (2016). Level of ph in drinking water of an oil and gas producing community and perceived biological and health implications. European Journal of Basic and Applied Sciences, 3(3), 53–60. https://www.researchgate.net/publication/332012834
Dulo, S. O. (2008). Determination of some Physico-chemical parameters of the Nairobi River, Kenya. J. Appl. Sci. Environ. Manage, 12(1), 57–62. www.bioline.org.br/ja33
Evans, A. A., Florence, N. O., & Eucabeth, B. O. M. (2018). Production and marketing of rice in Kenya: Challenges and opportunities. Journal of Development and Agricultural Economics, 10(3), 64–70. https://doi.org/10.5897/jdae2017.0881
Federation, W. E. (2012). APHA, AWWA, WEF. “Standard Methods for examination of water and wastewater.” Anales de Hidrología Médica, 5(2), 185-186–186. https://doi.org/10.5209/rev_ANHM.2012.v5.n2.40440
García-Ávila, F., Zhindón-Arévalo, C., Valdiviezo-Gonzales, L., Cadme-Galabay, M., Gutiérrez-Ortega, H., & del Pino, L. F. (2022). A comparative study of water quality using two quality indices and a risk index in a drinking water distribution network. Environmental Technology Reviews, 11(1), 49–61. https://doi.org/10.1080/21622515.2021.2013955
Gorde, S. P., & Jadhav, M. V. (2013). Assessment of Water Quality Parameters : A Review. International Journal of Engineering Research and Applications, 3(6), 2029–2035.
Irungu, J. W. (2018). Nitrate Source Apportionment , Fractionation , and Removal Mechanism Using Stable Isotopes -. 2017–2018.
K’oreje, K. O., Vergeynst, L., Ombaka, D., De Wispelaere, P., Okoth, M., Van Langenhove, H., & Demeestere, K. (2016). Occurrence patterns of pharmaceutical residues in wastewater, surface water and groundwater of Nairobi and Kisumu city, Kenya. Chemosphere, 149, 238–244. https://doi.org/10.1016/j.chemosphere.2016.01.095
Kanase, D., Shaikh, S., & Jagadale, P. (2016). Physico-Chemical Analysis of Drinking Water Samples of Different Places in Kadegaon Tahsil, Maharashtra (India). Advances in Applied Science Research, 7(6), 41–44. http://www.imedpub.com/articles/physicochemical-analysis-of-drinking-water-samples-of-different-places-in-kadegaon-tahsil-maharashtra-india.pdf
Know you H2O, W. R. C. (2020). Phosphate in Surface Water Streams, Lakes, and Ponds. https://www.knowyourh2o.com/outdoor-4/phosphate-in-surface-water-streams-lakes-ponds
Lapota, D., Duckworth, D., & Word, J. Q. (2000). Confounding Factors in Sediment Toxicology. Navy Guidance for Conducting Ecological Risk Assessment, November, 1–19.
Mbui, D., Chebet, E., Kamau, G., & Kibet, J. (2016). The state of water quality in Nairobi River, Kenya.
Asian Journal of Research in Chemistry, 9(11), 579. https://doi.org/10.5958/0974-4150.2016.00078.x
Ministry of Water and Irrigation. (2008). The National Water Resources Management Strategy ( NWRMS ). Ministry of Water and Irrigation Water Kenya, January 2006, 21. http://wstf.go.ke/watersource/Downloads/006. Water Resources Management Strategy.pdf
Mulwa, F., Li, Z., & Fangninou, F. F. (2021). Water Scarcity in Kenya: Current Status, Challenges and Future Solutions. In OALib (Vol. 08, Issue 01, pp. 1–15). https://doi.org/10.4236/oalib.1107096
Nyilitya, B., Mureithi, S., & Boeckx, P. (2020). Land use controls Kenyan riverine nitrate discharge into Lake Victoria–evidence from Nyando, Nzoia and Sondu Miriu river catchments*. Isotopes in Environmental and Health Studies, 56(2), 170–192. https://doi.org/10.1080/10256016.2020.1724999
Nyingi, D. W., Gichuki, N., & Ogada, M. O. (2013). Freshwater Ecology of Kenyan Highlands and Lowlands. In Developments in Earth Surface Processes (1st ed., Vol. 16). Elsevier B.V. https://doi.org/10.1016/B978-0-444-59559-1.00016-5
Pitot, H. C. (2021). Selection of Water Quality Variables. Water Quality Assessments, 5(1989), 81–148. https://doi.org/10.4324/noe0419216001-8
Renu Nayar (2020). Assessment of Water Quality Index and Monitoring of Pollutants by Physico-Chemical Analysis in Water Bodies: A Review. International Journal of Engineering Research And, V9(01), 178–185. https://doi.org/10.17577/ijertv9is010046
Safe Drinking Water Foundation (2017). TDS and pH — Safe Drinking Water Foundation. Safe Drinking Water Foundation. https://www.safewater.org/fact-sheets-1/2017/1/23/tds-and-ph
Sila, O. N. a. (2019). Physico-chemical and bacteriological quality of water sources in rural settings, a case study of Kenya, Africa. Scientific African, 2, e00018. https://doi.org/10.1016/j.sciaf.2018.e00018
United States Environmental Protection Agency. (2022). Ammonia | US EPA. https://www.epa.gov/caddis-vol2/ammonia
Vallero, D. A. (2011). Thermal Pollution. Waste, 425–443. https://doi.org/10.101 /B978-0-12-381475-3.10028-2
Vallero, D. A. (2019). Thermal Pollution. In Waste: A Handbook for Management (2nd ed.). Elsevier Inc. https://doi.org/10.1016/B978-0-12-815060-3.00020-7
Venkatesharaju, K., Ravikumar, P., Somashekar, R., & Prakash, K. (1970). Physico-Chemical and Bacteriological Investigation on the River Cauvery of Kollegal Stretch in Karnataka. Kathmandu University Journal of Science, Engineering and Technology, 6(1), 50–59. https://doi.org/10.3126/kuset.v6i1.3310
WHO/UNICEF, I.-S. S. 6 P. R. (2021). WHO/UNICEF Joint Monitoring Program for Water Supply, Sanitation and Hygiene (JMP) – Progress on household drinking water, sanitation and hygiene 2000 – 2020. In Imi-Sdg6 Sdg 6 Progress Reports. https://www.unwater.org/publications/who-unicef-joint-monitoring-program-for-water-supply-sanitation-and-hygiene-jmp-progress-on-household-drinking-water-sanitation-and-hygiene-2000-2020/
