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Table 3 Comparison of particular water quality parameters’ mean values obtained from various studies on rivers and tributaries in Cameron Highlands

From: Land use change in highland area and its impact on river water quality: a review of case studies in Malaysia

No. References/parameters (mean values) pH EC μS/cm DO (mg/l) TDS (mg/l) Salinity (ppt) Turbidity (NTU) BOD (mg/l) COD (mg/l) NH3-N (mg/l) TSS (mg/l) TN (mg/L) TP (mg/L) WQI
1 Eisakhani and Malakahmad 2009a 6.90 52.11 23.60 13.40 16.01 1.70 0.22
2 Riduan et al. 2009 7.30 49.00 3.19 0.030 603.00
3 Saadati et al. 2012 67.90 13.20 0.03 170.75 480.00
4 Khalik et al. 2013aa 6.54 58.33 6.31 43.33 0.01 2.64 16.67 0.25 15.08 1.13 0.88 78.00 (class II)
5 Khalik et al. 2013b 6.52 51.83 4.83 38.40 0.14 1.60
6 Khalik and Abdullah 2013 7.40 95.69 9.28 40.00 0.02
7 Al-Nafiey et al. 2014 7.65 50.07
8 Jamil et al. 2014a 77.05 (class II)
9 Abdullah et al. 2015a 6.35 54.98 8.48 35.86 0.02
10 Aminu et al. 2014a 8.12 8.33 1.76 13.00 0.80 85.05 62.41 (class III)
11 Rasul et al. 2015 6.87 68.80 7.08 47.15 88.63 7.79 20.55 0.95 136.05 3.28 1.16
12 Tan and Beh 2016 6.19 6.84 2.90 27.42 0.23 0.05 82.92 (class II)
  1. aDry season/AWF (average water flow)