Hindawi Publishing Corporation Journal of Chemistry Volume 2013, Article ID 871056, 10 pages http://dx.doi.org/10.1155/2013/871056 Research Article Water Quality Assessment of the Semenyih River, Selangor, Malaysia Fawaz Al-Badaii, Mohammad Shuhaimi-Othman, and Muhd Barzani Gasim School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600Bangi,Selangor,Malaysia Correspondence should be addressed to Fawaz Al-Badaii;
[email protected] Received 3 May 2013; Accepted 21 July 2013 Academic Editor: Dimosthenis L. Giokas Copyright © 2013 Fawaz Al-Badaii et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This study was carried out to determine the Semenyih River water quality based on the physicochemical and biological parameters. The sampling was conducted in dry and rainy seasons during 2012. Water samples were collected from 8 stations along the river and analyzed using standard methods. The results showed that temperature, pH, conductivity, TDS, SO4, and TH were classified as class I, while DO, turbidity, and BOD were categorized under class II, and NH3-N, TSS, COD, and OG were categorized as class III based on NWQS, Malaysia. Moreover, NO3 wasclassifiedunderclassIV,whilePO4 and FC were categorized as class V and exceeded the allowable threshold levels. Therefore, the river was slightly polluted with NH3-N, TSS, COD, and NO3, whereas it is extremely contaminated with PO4 and FC. Furthermore, cluster analysis classified 8 sampling stations into three clusters based on similarities of water quality features.