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Table 2

Water quality data at different sampling locations

Water quality indicator, unitGroundwaterAfter open aeratorAfter reaction chamberAfter I filterAfter closed aeratorAfter II filterAfter III filter
pH 7.39 7.38 7.02 7.13 7.15 7.21 7.27 
Oxygen, mgO2/L 0.25 6.03 6.05 3.42 7.19 5.02 2.29 
Permanganate index (PI), mgO2/L 6.00 6.00 4.20 1.50 1.40 1.20 1.15 
Total iron, μg/L 5,625 4,520 4,392 2,040 1,950 859 111 
Ammonium, mg/L 1.66 1.65 1.59 1.48 1.44 0.01 0.01 
Manganese, μg/L 252 250 248 220 215 212 33 
Colour, mgPt/L 34 34 31 
Water quality indicator, unitGroundwaterAfter open aeratorAfter reaction chamberAfter I filterAfter closed aeratorAfter II filterAfter III filter
pH 7.39 7.38 7.02 7.13 7.15 7.21 7.27 
Oxygen, mgO2/L 0.25 6.03 6.05 3.42 7.19 5.02 2.29 
Permanganate index (PI), mgO2/L 6.00 6.00 4.20 1.50 1.40 1.20 1.15 
Total iron, μg/L 5,625 4,520 4,392 2,040 1,950 859 111 
Ammonium, mg/L 1.66 1.65 1.59 1.48 1.44 0.01 0.01 
Manganese, μg/L 252 250 248 220 215 212 33 
Colour, mgPt/L 34 34 31 
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