Water quality is the basis of public health and environmental sustainability and rivers are vital sources of water. Using physical, chemical and bacteriological criteria, the current study evaluated the degree of water contamination in the Manli River in Kerala, India. Five locations along the river, including the upper and lower stream sections, were used to gather water samples. Turbidity, electrical conductivity, pH, total dissolved solids, alkalinity, hardness and chemical ions were all measured in the samples. Except for iron, which at one place surpassed the permissible level, most of the physical and chemical properties stayed within acceptable bounds. The prevalence of sewage contamination was implied by the bacteriological analysis, which revealed the growth of coliform bacteria in every sample site. Reduced water quality was indicated by a downstream drop in aquatic life, especially the pollution-enduring odonate species Brachythemis contaminata. Some of the possible sources of contamination include the direct discharge of wastewater that seeps from nearby industrial zones and towns. According to the study, to reduce health hazards and save the river's ecosystem, immediate action is required, including the construction of a water treatment plant in Eravakkad.
Murali K.V.*
Dept. of Forest Resource Management, College of Forestry, Kerala Agricultural University, Thrissur, Kerala (680 656), India
Abhin M. Sunil
Dept. of Wildlife Sciences, College of Forestry, Kerala Agricultural University, Thrissur, Kerala (680 656), India
Gopakumar S.
Murali K.V., Sunil, A.M., Gopakumar, S., 2025. Water quality of Manli River, Thrissur, Kerala: A ticking bomb? Biotica Research Today 7(1), 16-20. DOI: 10.54083/BRT/7.1.2025/16-20.
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. DOI: https://doi.org/10.1007/BF03325974.
Ashley, R., Cashman, A., 2006. The impacts of change on the long-term future demand for water sector infrastructure. In: Infrastructure to 2030: Telecom, Land Transport, Water and Electricity. OECD Publishing, Paris. pp. 241-349. DOI: https://doi.org/10.1787/9789264023994-en.
Benneyworth, L., Gilligan, J., Ayers, J.C., Goodbred, S., George, G., Carrico, A., Karim, M.R., Akter, F., Fry, D., Donato, K., Piya, B., 2016. Drinking water insecurity: Water quality and access in coastal south-western Bangladesh. International Journal of Environmental Health Research 26(5-6), 508-524. DOI: https://doi.org/10.1080/09603123.2016.1194383.
Bora, A., 2019. Odonate (Dragonflies and Damselflies) diversity as a marker of water quality in Sivasagar, Assam, India. International Journal on Emerging Technologies 10(3), 51-54.
Chai, N., Yi, X., Xiao, J., Liu, T., Liu, Y., Deng, L., Jin, Z., 2021. Spatiotemporal variations, sources, water quality and health risk assessment of trace elements in the Fen River. Science of the Total Environment 757, 143882. DOI: https://doi.org/10.1016/j.scitotenv.2020.143882.
Chattopadhyay, S., Rani, L.A., Sangeetha, P.V., 2005. Water quality variations as linked to land use pattern: A case study in Chalakudy river basin, Kerala. Current Science 89(12), 2163-2169. URL: https://www.jstor.org/stable/24111081.
George, T., John, S.K., 2015. Water Pollution and its Impact on Rural Health: Micro Analysis based on River Pompa, Kerala, India. Minor Research Project Report. University Grants Commission, South Block, Banglore. p. 55.
Laskar, N., 2024. Statistical analysis and water quality modeling towards holistic health assessment of Himalayan and peninsular rivers of India. Environmental Challenges 15, 100917. DOI: https://doi.org/10.1016/j.envc.2024.100917.
Maheshwari, B., Varua, M., Ward, J., Packham, R., Chinnasamy, P., Dashora, Y., Dave, S., Soni, P., Dillon, P., Purohit, R., Hakimuddin., Shah, T., Oza, S., Singh, P., Prathapar, S., Patel, A., Jadeja, Y., Thaker, B., Kookana, R., Grewal, H., 2014. The role of transdisciplinary approach and community participation in village scale groundwater management: Insights from Gujarat and Rajasthan, India. Water 6(11), 3386-3408. DOI: https://doi.org/10.3390/w6113386.
Muogbo, N.B., Makut, M.D., Ishaleku, D., 2023. Assessment of bacteriological quality and heavy metals concentrations of Borehole water tanks in Wuse 1 District of Abuja, Nigeria. Microbiology Research Journal International 33(5), 35-42. DOI: https://doi.org/10.9734/mrji/2023/v33i51384.
Panagopoulos, Y., Alexakis, D.E., Skoulikidis, N.T., Laschou, S., Papadopoulos, A., Dimitriou, E., 2022. Implementing the CCME water quality index for the evaluation of the physicochemical quality of Greek rivers. Water 14(17), 2738. DOI: https://doi.org/10.3390/w14172738.
Roy, A.N., Paramanik, M., 2022. Assessment of groundwater and surface-water resources of Gushkara in Purba Bardhaman (West Bengal, India) using the water quality index. International Journal of Zoological Investigations 8(2), 814-817. DOI: https://doi.org/10.33745/ijzi.2022.v08i02.098.
Umar, A., Umar, R., Ahmad, M.S., 2001. Hydrogeological and hydrochemical framework of regional aquifer system in Kali-Ganga sub-basin, India. Environmental Geology 40(4-5), 602-611. DOI: https://doi.org/10.1007/s002540000215.
Vimalkumar, K., Nikhil, N.P., Arun, E., Mayilsamy, M., Babu-Rajendran, R., 2021. Synthetic musks in surface water and fish from the rivers in India: Seasonal distribution and toxicological risk assessment. Journal of Hazardous Materials 414, 125558. DOI: https://doi.org/10.1016/j.jhazmat.2021.125558.