Application of CCME Water Quality Index for Drinking Water Quality Assessment along Kalu Ganga, Sri Lanka


  • Inoka Batugedara Department of Zoology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
  • Indunil Senanayake Department of Zoology, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka


CCME WQI, Kalu Ganga, Water quality


Kalu Ganga is considered one of the major rivers in Sri Lanka. The river contributes to drinking water supply, domestic water usage, agriculture, mini-hydropower generation, small-scale industries, and recreation. The present research fills the information gap regarding the water quality status along Kalu Ganga. At the same time, only a few attempts have been made using the Canadian Council of Ministers of the Environment Water Quality Index (CCME WQI) to interpret water quality conditions in Sri Lankan rivers. Therefore, this study attempted (i) to investigate the temporal and spatial variations in drinking water quality along Kalu Ganga and (ii) to calculate the CCME WQI. Herein, July-October (2020) were considered wet months, while January-February (2021) were considered dry months. Altogether, twenty surface water sampling locations were selected, including six locations in the head zone, seven locations in the transport zone, and another seven locations in the deposition zone. In total, thirteen water quality parameters were measured on a monthly basis using standard methodologies; these included temperature, pH, total dissolved solids, electrical conductivity, salinity, dissolved oxygen, biological dissolved oxygen, nitrate, total phosphate, orthophosphate, total alkalinity, total hardness, and chlorophyll-a. CCME WQI was calculated using the total hardness, total dissolved solids, total alkalinity, electrical conductivity, pH, nitrate, orthophosphate, and total phosphate parameters. All sampling locations were categorised as excellent for drinking according to CCME WQI (95-100), with the exception of sampling locations in the deposition zone with fair-good quality (79-80) during the dry months. Overall, the drinking water in Kalu Ganga was categorized as excellent-fair based on the water quality parameters for this WQI calculation. However, saltwater intrusion was observed up to 14km from the river mouth during the dry months. Further studies, including heavy metals and microbial parameters, can further develop the WQI.


Balasankar T, Nagarajan S. A correlation study on physicochemical characteristics of groundwater in and around Cuddalore Sipcot, Tamil Nadu. Indian Journal of Environmental Protection 2000; 20(6): 427-9.

Madhuri U, Srinivas T, Sirresha K. A study on groundwater quality in the commercial area of Visakhapatnam. Pollution Research, 2004; 23(3): 565-8.

Ngwenya, F. Water quality trends in the Eerste River, Western Cape-2005. Ph.D. thesis, University of the Western Cape; 2006.

Postel S, Richter B. Rivers for life: managing water for people and nature. London: Island Press, 2003,5-11.

Food and Agriculture Organization. AQUASTAT - FAO's Global Information System on Water and Agriculture. [Online]. 2021 [Cited 2021 March 11].

Tripathi AD, Agrawal M. Assessment of drinking water quality: A case study of Moradabad Area, Uttar Pradesh, India. International Journal of Environmental Sciences 2016; 5(2): 333.

Anseeuw W, Wily LA, Cotula L. and Taylor M. Land rights and the rush for land: Findings of the global commercial pressures on land research project, Italy; 2011.

Fakayode SO. Impact assessment of industrial effluent on water quality of the receiving Alaro River in Ibadan, Nigeria. African Journal of Environmental Assessment and Management 2005; 10: 1-13.

Wang J, Liu XD, Lu J. Urban River pollution control and remediation. Procedia Environmental Sciences, 2012; 13:1856-62.

Mahvi AH, Nouri J, Babaei AA and Nabizadeh R. Agricultural activities impact on groundwater nitrate pollution. International Journal of Environmental Science & Technology, 2005; 2(1):41-7.

Noori R, Sabahi MS, Karbassi AR, Baghvand A, Taati Zadeh, H. Multivariate statistical analysis of surface water quality based on correlations and variations in the data set. Desalination 2010; 260 (1-3): 129-36.

Kazi TG, Arain MB, Jamali MK, Jalbani N, Afridi HI, Sarfraz RA, Baig JA, Shah AQ. Assessment of water quality of polluted lake using multivariate statistical techniques: A case study. Ecotoxicology and environmental safety 2009; 72(2):301-9.

Bharti N, Katyal D. Water quality indices used for surface water vulnerability assessment. International journal of environmental sciences 2011, 2(1):154-73.

Boyd J. Water pollution taxes: a good idea doomed to failure? Public Finance and Management 2003; 1(3): 34-66.

Tyagi S, Sharma B, Singh P, Dobhal R. Water quality assessment in terms of water quality index. American Journal of Water Resources 2013; 1(3): 34-8.

Uddin MG, Nash S, Olbert AI. A review of water quality index models and their use for assessing surface water quality. Ecological Indicators 2021; 122: 107218.

Silva EIL, Rott E, Thumpela I, Athukorala N, Silva ENS. Species composition and relative dominance of reservoir phytoplankton in Sri Lanka: Indicators of environmental quality. The International Journal of Biological Sciences 2013; 4(4):92-104.

De Silva SS. Reservoirs of Sri Lanka and their fisheries. FAO; 1988.

Dharmasena GT 2007. Integrated water resources management and sound information system- Sri Lankan experience. In: Fisher, J. Ed. The 32nd WEDC International Conference, 13-17 November 2006, Colombo, Sri Lanka; 2007.

Dissanayake CB, Weerasooriya SVR. The environmental chemistry of Mahaweli River, Sri Lanka. International journal of environmental studies 1986; 28(2-3): 207-23.

Costa HH. The status of limnology in Sri Lanka. Internationale Vereinigung für Theoretische und Angewandte Limnologie: Mitteilungen 1994; 24(1):73-85.

Abeysinghe NDA, Samarakoon MB. Analysis of variation of water quality in Kelani River, Sri Lanka. International Journal of Environment, Agriculture and Biotechnology 2017; 2 (6): 238965.

Gunawardena A, Wijeratne EMS, White B, Hailu A, Pandit R. Industrial pollution and the management of river water quality: A model of Kelani River, Sri Lanka. Environmental monitoring and assessment 2017; 189(9):1-15.

Herath G, Amaresekera, T. Assessment of urban and industrial pollution on water quality: Kelani River Sri Lanka. Southeast Asian Water Environment 2007; 2(2):91-8.

Kuruppuarachchi HD, Pathiratne A. Toxic hazards of industrial waste receiving canal system in the lower catchment of Kelani River basin, Sri Lanka. Journal of the National Science Foundation of Sri Lanka, 2020; 48(1): 37-47.

Liyanage CP, Yamada K. Impact of population growth on the water quality of natural water bodies. Sustainability, 2017; 9(8):1405.

Mahagamage MGYL and Manage, PM. Water quality index (CCME-WQI) based assessment study of water quality in Kelani River basin, Sri Lanka. International Journal of Environment and Natural Resources 2014; 1:199-204.

Bandara JMRS, Wijewardena HVP, Bandara, YMAY, Jayasooriya RGPT and Rajapaksha H. Pollution of River Mahaweli and farmlands under irrigation by cadmium from agricultural inputs leading to a chronic renal failure epidemic among farmers in NCP, Sri Lanka. Environmental geochemistry and health 2011; 33 (5):439-53.

Perera PCT, Sundarabarathy TV, Sivananthawerl T, Kodithuwakku SP, Edirisinghe U. Arsenic and cadmium contamination in water, sediments and fish is a consequence of paddy cultivation: evidence of river pollution in Sri Lanka. Achievements in the Life Sciences 2016; 10(2):144-60.

Sureshkumar N, Amaratunga AAD, Wickramaarachchi WDN. Comparison of physico-chemical characteristics and pollution trends of the Menik Ganga, Kirindi Oya, and Walawe Ganga.In: The 25th Anniversary Scientific Conference of NARA on Tropical Aquatic Research towards Sustainable Development, February, Crow Island, Colombo 15. Colombo: Environment science division, NARA, p. 41; 2007.

Amarathunga A, Jinadasa S and Azmy S. 2013. Sedimentary characteristics and water quality status in Polwatta River and Weligama Bay in Sri Lanka. Journal of Environmental Professionals Sri Lanka 2013; 2(1): 38-51.

Amarathunga AAD, Kazama F. Impact of land use on surface water quality: A case study in the Gin River basin, Sri Lanka. Asian Journal of Water, Environment and Pollution 2016; 13(3): 1-13.

Dharmasoma I, Wijayarathna NS, Munaweera K. Application of Water Quality Index to Monitor Ground Water Quality: A Case Study in Colombo Catchment of Sri Lanka. In Proceedings of International Forestry and Environment Symposium, Colombo, Sri Lanka; 2019.

Mahagamage MGYL, Chinthaka SDM, Manage PM. Assessment of water quality index for groundwater in the Kelani River basin, Sri Lanka. International Journal of Agriculture and Environmental Research 2015; 2(5): 1158-71.

Amarasinghe SR, Madushanka PLA. Spatial and Temporal Variation of Irrigation Water Quality of a Small Tank Cascade System in Up-stream of Malala Oya River Basin, Thanamalwila, Sri Lanka. Rajarata University Journal 2021; 6(2): 84-91.

Gunarathna MHJP, Kumari MKN. Water quality assessment of a tank cascade system using CCME water quality index. International Journal of Research and Innovation in Applied Science 2016; 1(3): 1-6.

Panditharathne DLD, Abeysingha NS, Nirmanee KGS, Mallawatantri, A. Application of revised universal soil loss equation (Rusle) model to assess soil erosion in “Kalu Ganga” River Basin in Sri Lanka. Applied and Environmental Soil Science 2019: 1-15

Samarasinghea SMJS, Nandalalb HK, Weliwitiyac DP, Fowzed JSM, Hazarikad MK, Samarakoon, L. Application of remote sensing and GIS for flood risk analysis: a case study at Kalu-Ganga River, Sri Lanka. International Archives of the Photogrammetry, Remote Sensing and Spatial Information Science 2010; 38(8): 110-5.

Hapuarachchi HP, Zhijia LI, Wolfgang FA. Application of the SWAT model for river flow forecasting in Sri Lanka. Journal of Lake Sciences 2003; 15: 147-54.

Katupotha J. Cultural and Historical Monuments and Protected Resources of Archaeological Significance in the Lower Kalu Ganga Basin, Sri Lanka. In: The National Archaeological Symposium, 19/20 July 2011, Sri Lanka Foundation Institute (SLFI), Colombo 07;2011.

Batugedara BDIM, Senanayake SAMAIK. Assessment of water quality status in a tropical river mouth: Special reference to Kalu Ganga, Sri Lanka. Proceedings of International Conference on Applied and Pure Sciences; 2022 Oct 14; University of Kelaniya: Sri Lanka; 2022.

Batugedara BDIM, Senanayake SAMAIK. Contamination status of selected heavy metals in Kalu Ganga river mouth and nearby coastal waters, Sri Lanka: A baseline study. 6th International Research Conference, 2022; Uwa Wellassa University of Sri Lanka;2022.

Jayasinghe DLDAR, Hettiarachchi M, 2012. Pollution at a discharge point of treated effluent from a textile mill factory in Kalu Ganga, evaluated by water quality parameters and histological alterations (biomarker of effect) in Rasbora daniconius and Puntius sarana. Proceedings of the eighteen sessions of the Sri Lanka Association for Fisheries and Aquatic Resources,17th and 18th May 2012, Auditorium of Sri Lanka Foundation Institute Colombo 07;2012.

Ratnayake NP, Silva KBA, Kumara IGIK. Chloride contamination in construction aggregates due to periodic saline water intrusion: a case study in the Kaluganga River Estuary, Sri Lanka. Environmental Earth Sciences 2013; 69(8):2529-40.

APHA. 2017. Standard methods for examination of water and wastewater. 23rd ed. American Public Health Association, Washington.

Central Environmental Authority (CEA), National Environmental, 2019. National Environmental Act, No. 47 of 1980: Ambient Water Quality Regulations, No. 01 of 2019. Sri Lanka.

Sri Lanka Standards Organization (2012), Drinking water Standards- first Revision 614:2013

Department of Meteorology, Sri Lanka (2020). Monthly weather summary, Weather synopsis 2020. [cited 2024 January 13]. Available from:

Department of Meteorology, Sri Lanka (2021). Monthly weather summary, Weather synopsis 2021. [cited 2024 January 13] Available from:

Shrestha S, Kazama F. Assessment of surface water quality using multivariate statistical techniques: A case study of the Fuji River basin, Japan. Environmental Modelling & Software, 2007; 22: 464-75.

Chapman D. Water quality assessments: A guide to using biota, sediments and water in environmental monitoring. CRC Press; 1996.

US EPA, Drinking water regulations and contaminants Available at: contaminants (Accessed: 25 April 2022).

Department of Meteorology, Sri Lanka. 2021. [cited 2021 May 11] Available from: option=com_content&view=article&id=94&Itemid=310&lang=en&lang=en.

Arora, P. Physical, Chemical and Biological Characteristics of Water, 12th December, Central University of Punjab,2017; 4-13.

WHO, Health criteria, and other supporting information. Guidelines for drinking water,1996.

Corwin DL, Yemoto K. Salinity: Electrical conductivity and total dissolved solids. Soil Science Society of America journal 2022; 84(5): 1442-61.

Marandi A, Polikarpus M, Joeleht A. A new approach for describing the relationship between electrical conductivity and significant anion concentration in natural waters Appl. Geochemistry 2013; 38: 103-9.

Moore RD, Richards G, Story A. Electrical conductivity as an indicator of water chemistry and hydrologic process. Streamline Watershed Management Bulletin 2008; 11(2): 25-9.

Rusydi, AF. Correlation between conductivity and total dissolved solids in various types of water: A review. In IOP conference series: earth and environmental science 2018. IOP Publishing, 18, pp.12-9.

Moujabber ME, Samra BB, Darwish T. Atallah T. Comparison of different indicators for groundwater contamination by seawater intrusion on the Lebanese coast. Water Resources Management 2006; 20: 161-80.

Yin K, Lin Z, Ke Z. Temporal and spatial distribution of dissolved oxygen in the Pearl River Estuary and adjacent coastal waters. Continental Shelf Research 2004; 24 (16):1935-48.

Fianko JR, Lowor ST, Donkor A, Yeboah PO. Nutrient chemistry of the Densu River in Ghana. The Environmentalist 2010; 30(2):145 52.

Ileperuma OA, 2000. Environmental pollution in Sri Lanka: a review; 2000.

Floury P, Gaillardet J, Tallec G, Ansart P, Bouchez J, Louvat P, Gorge, C. Chemical weathering and CO2 consumption rate in a multilayered aquifer dominated watershed under intensive farming: The Orgeval critical zone observatory, France. Hydrological Processes 2019; 33(2): 195-213.

Nurnberg G, Shaw M. Productivity of clear and humic lakes: Nutrients, phytoplankton, bacteria. Hydrobiologia 1999; 382(1): 97-112.

Aravinna AG, Priyantha N, Pitawala HM, Yatigammana SK. Seasonal Variations of Water Quality of Downstream Catchment of River Mahaweli. International Journal of Biological Sciences and Engineering 2013; 4(4): 111-20.




How to Cite

Inoka Batugedara, & Senanayake, I. (2024). Application of CCME Water Quality Index for Drinking Water Quality Assessment along Kalu Ganga, Sri Lanka. Science & Technology Asia, 29(1), 239–255. Retrieved from



Biological sciences