Assessment of Quality of Water from Catchment to Consumers: A Study based on Rahas-Ella Water Purification Plant in Kandy, Sri Lanka
Published: 2024-01-11
Page: 25-35
Issue: 2024 - Volume 7 [Issue 1]
A. B. N. Withanage
Department of Botany, Faculty of Natural Sciences, Kandy Regional Centre, The Open University of Sri Lanka, Polgolla, Sri Lanka.
P. W. H. K. P. Daulagala *
Department of Botany, Faculty of Natural Sciences, Kandy Regional Centre, The Open University of Sri Lanka, Polgolla, Sri Lanka.
*Author to whom correspondence should be addressed.
Abstract
Introduction: Rahas-Ella is one of the fascinating waterfalls located in the Wattegama area in Kandy District, Sri Lanka. By receiving raw water from Rahas-Ella, a water purification plant was established in 2013 to provide safe drinking water to the residents in Wattegama municipal area. An investigation was conducted to evaluate several water quality parameters for both raw and purified water, in response to consumer complaints over the quality of drinking water received from this purification plant.
Methodology: Thirteen sampling locations (L01-L13) were identified along the waterfall, from the onsite water purification plant, two wells, and in addition two tap water sources through which the purified water is distributed. Some selected physicochemical and bacteriological parameters were analyzed.
Results: The study revealed that several parameters were higher than the standards concerned for drinking water. Mainly, the turbidity level was high in both the catchment and the intake and this could be a serious health risk to the community. Further, considerably high total counts of both coliforms and Escherichia coli (E. coli) were detected in all samples exceeding the standard values. Although oil and grease were not monitored in this present study, several dwellers reported problems associated with oil pollution.
Conclusion: Based on the observations and results of the study, numerous measures were recommended to improve the water quality of the catchment and to upgrade the treatment facility. The relevant authorities must understand the pathways of microbiological and physicochemical contamination of drinking water and their potential health implications and should carry out necessary steps to improve the quality of water distributed from this purification plant and lessen the negative consequences of improperly purified water on human health.
Keywords: Microbiological analysis, physicochemical parameters, Rahas-Ella fall, water quality
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References
Bhat SA, Meraj G, Yaseen S, Pandit AK. Statistical assessment of water quality parameters for pollution source identification in Sukhnag stream: An inflow stream of lake Wular (Ramsar Site), Kashmir Himalaya. Journal of Ecosystems. 2014;1-18.
Vadde K, Wang J, Cao L, Yuan T, McCarthy A, Sekar R. Assessment of water quality and identification of pollution risk locations in Tiaoxi River (Taihu watershed), China. Water. 2018;10(2):183.
USEPA, Recent Recommended Water Quality Criteria, United States Environmental Protection Agency; 2007.
Tyagi S, Sharma B, Singh P. Dobhal R. Water quality assessment in terms of water quality index. American Journal of Water Resource. 2013;1(3):34-38.
Akter T, Jhohura FT, Akter F, Chowdhury TR, Mistry SK, Dey D, Barua MK, Islam MA, Rahman M. Water quality index for measuring drinking water quality in rural Bangladesh: A cross-sectional study. Journal of Health Population and Nutrition. 2016;35:1-12.
Goel PK. Water pollution: Causes, effects and control. New Age International, New Delhi; 2006.
Ongley ED, Xiaolan Z, Tao Y. Current status of agricultural and rural non-point source pollution assessment in China. Environmental Pollution. 2010;158(5): 1159-1168.
Savci S. An agricultural pollutant: Chemical fertilizer. International Journal of Environmental Science and Development. 2012;3(1):77-80.
Wijesekera NS, Kamaladasa MB, Nanayakkara MA, Daluwatta D. Study on sustainable water resource management for drinking purposes. University of Moratuwa: Sri Lanka; 2020.
WHO, Guidelines for Drinking Water Quality. 4th Edition. World Health Organization, Geneva, Switzerland; 2011.
SLS 614: 2013, Specification for Potable Water (First Revision). Sri Lanka Standards Institution. Colombo, Sri Lanka; 2013.
Rodrigues C. Cunha MA. Assessment of the microbiological quality of recreational waters: indicators and methods. Euro-Mediterranean Journal of Environmental Integration. 2017;2(1):1-18.