Water-quality assessment of the Langat River at kilometre 7, Jalan Kajang-Bangi, Selangor, Malaysia

Muhammad Barzani Gasim, Mazen M. Jamil, Sahibin @ Sahibini Abd Rahim, Mohd. Ekhwan Toriman

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The Langat River is one of the main sources of water supply for the Selangor area. For waterquality analysis, water sampling was carried out at five stations during the wet (November 2009) and dry (February 2010) seasons. These five stations are located along the river, with the exception of station 3. Station 1 and station 2 are located upstream station 3, while station 4 and station 5 lie downstream of station 3. Station 3 differs from the other four stations because it is a discharge from Universiti Kebangsaan Malaysia campus. This study was conducted to determine water quality as well as levels of pollution, based on the Water Quality Index (WQI) and the Malaysian Interim National Water Quality Standard (INWQS), of the Langat River at Km 7. A total of 14 water-quality parameters-temperature, pH, dissolved oxygen (DO), conductivity, chemical oxygen demand (COD), biochemical oxygen demand (BOD), total suspended solids (TSS), total dissolved solids (TDS), PO4, NO3, NH3-N, SO4, oil and grease, and E. coli-were selected and analyzed in situ and in the laboratory. The laboratory work was carried out according to Hach and American Public Health Association (APHA) methods. All 14 water-quality parameters were found to be within the normal range according to INWQS, with the exception of NH3-N, PO 4, and E. coli, all of which exceeded the recommended levels. Based on the WQI classification, the Langat River can be categorized as moderately polluted, or Class III, at all sampling stations, except at station 3 during the first sampling (November 2009), where it is categorized as Class II.

Original languageEnglish
Pages (from-to)188-198
Number of pages11
JournalArab World Geographer
Volume12
Issue number3-4
Publication statusPublished - Sep 2009

Fingerprint

Malaysia
river
water quality
water
station
demand
sampling
water management
biochemical oxygen demand
chemical oxygen demand
dissolved oxygen
conductivity
water supply
pollution

Keywords

  • Langat river
  • Malaysia
  • River pollution
  • Water analysis
  • Water-quality classification

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Earth-Surface Processes

Cite this

Water-quality assessment of the Langat River at kilometre 7, Jalan Kajang-Bangi, Selangor, Malaysia. / Gasim, Muhammad Barzani; Jamil, Mazen M.; Abd Rahim, Sahibin @ Sahibini; Toriman, Mohd. Ekhwan.

In: Arab World Geographer, Vol. 12, No. 3-4, 09.2009, p. 188-198.

Research output: Contribution to journalArticle

Gasim, Muhammad Barzani ; Jamil, Mazen M. ; Abd Rahim, Sahibin @ Sahibini ; Toriman, Mohd. Ekhwan. / Water-quality assessment of the Langat River at kilometre 7, Jalan Kajang-Bangi, Selangor, Malaysia. In: Arab World Geographer. 2009 ; Vol. 12, No. 3-4. pp. 188-198.
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