Water Quality Assessment of the Inanam River in Kota Kinabalu, Sabah, Malaysia
DOI:
https://doi.org/10.54987/jemat.v13i1.1108Keywords:
Urban river, Water Quality Index, National Water Quality Standard, Physicochemical parameters, Biological indicatorsAbstract
This study provides a comprehensive assessment of the water quality of the Inanam River, Kota Kinabalu, Sabah, Malaysia, across four sampling stations from upstream to downstream. Both in-situ and ex-situ analyses were performed to evaluate physicochemical and biological parameters, including BOD, COD, ammoniacal nitrogen (AN), TSS, DO, pH, temperature, TDS, salinity, electrical conductivity (EC), fecal coliform, and total coliform. The Water Quality Index (WQI) was determined following Malaysia’s National Water Quality Standards (NWQS). Findings reveal that the Inanam River falls into Class II and Class III categories, with DO, COD, and AN levels in several locations meeting or exceeding Class III thresholds, particularly in downstream segments. Urban stretches exhibited the most significant water quality deterioration, highlighting the urgent need for targeted pollution control and management interventions.
References
Mokhtar Z, Idris SH, Kenway S, Pikaar I. Analysing the regulatory mechanisms of river pollution in Malaysia. Int J Bus Econ Law. 2024;31(1):23-37.
Camara M, Jamil NR, Abdullah AF. Impact of land uses on water quality in Malaysia: a review. Ecol Process. 2019;8-10.
Department of Environment Malaysia. Annual Environmental Quality Report. Putrajaya: DOE Malaysia; 2019.
Department of Environment Malaysia. Control Initiatives on Pollution of Water Resources. Putrajaya: DOE Malaysia; 2021.
Lanree @ Henry Asing. River pollution in Malaysia: conservation instead of endlessly cleaning works. Int J Acad Res Bus Soc Sci. 2024;14(1):885-898.
Ladoni AMH. The sources of pollution in the Likas and Inanam River Basin in Kota Kinabalu, Sabah. Sosiohumanika. 2009;2(1). 89-106.
Ku KH, Golingi T, Lim CS, Yangkat Y, Moduying V. Preliminary environmental profile study of Inanam River Catchment, Sabah. In: Proc IAHR World Congress; 2017.
Standard methods for the examination of water and wastewater. 23rd ed. Washington (DC): American Public Health Association; 2017.
Croghan D, Van Loon AF, Bradley C, et al. Identifying the impacts of urbanization and extreme flows on river water temperatures in headwater catchments. Hydrol Sci J. 2025;70(2):347-357.
Bello AD, Hashim NB, Haniffah MRM. Predicting impact of climate change on water temperature and dissolved oxygen in tropical rivers. Climate. 2017;5(3):58.
Abdul Aziz IL. Climate change and the future of river water quality in Inanam Likas River Basin, Kota Kinabalu, Sabah [dissertation]. Shah Alam: Universiti Teknologi MARA; 2016.
Mokhtar Z. Review of Malaysia's environmental waterway compliances with industrial effluent discharge. Int J Bus Econ Law. 2023;30:1.
Arman NZ, Aris A, Salmiati, et al. Water quality assessment of Johor River Basin, Malaysia using multivariate analysis. Environ Sci Pollut Res Int. 2025;32(4):1766-1782.
Wang L, Luo H, Wu J, et al. A review of the emerging risks of acute ammonia nitrogen toxicity to aquatic decapod crustaceans. Water. 2023;15(1):27.
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Copyright (c) 2025 Fera Cleophas, Nur Zaida Zahari, Farrah Anis Fazliatul Adnan, Kamsia Budin, Hardianshah Saleh, Baba Musta
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