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Table 2

The effect of cloth filtration on final drinking water quality parameters

Quality after coagulationRemoval efficiencyQuality after filtrationRemoval efficiencyWHO STDTZS
Turbidity (Initial value = 1,000 NTU) 
12 (9–16) NTU 98.7% (98.4–99.1%) 4 (2–6) NTU 66% (50–83.3) 5 NTU 30 NTU 
Color (Initial value = 398 MgCo-Pt/L) 
41.3 (38–45) 89.6% (88.7–90.4) 26 (19–33) 37% (36.7–53%) 50 
pH 
6.86 (6.6–7.0) N/A 6.9 (6.55–7.2) N/A 6.5–8.5 6.5–8.5 
Quality after coagulationRemoval efficiencyQuality after filtrationRemoval efficiencyWHO STDTZS
Turbidity (Initial value = 1,000 NTU) 
12 (9–16) NTU 98.7% (98.4–99.1%) 4 (2–6) NTU 66% (50–83.3) 5 NTU 30 NTU 
Color (Initial value = 398 MgCo-Pt/L) 
41.3 (38–45) 89.6% (88.7–90.4) 26 (19–33) 37% (36.7–53%) 50 
pH 
6.86 (6.6–7.0) N/A 6.9 (6.55–7.2) N/A 6.5–8.5 6.5–8.5 

Note: Shown in parenthesis are the ranges of residual turbidity.

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