Chemical used (kg/mth). Dose Rates, mg/litre Pre Average Lab – Treatment Post Treatment Total Min Max Average Treatment Test HTH - - 135 2mg/l 3mg/l 2.3mg/l 3mg/l Alum nil - - - - - - - Polymer 2250 - 2250 5.5 mg/l 7 mg/l 6.5mg/l 7mg/l “ NaCl 1200 - 1200 -- - 3.5mg/l 3.5mg/l “ Raw Water Pumped (m3): 601356 m3 Treated Water (m3): 559154 m3 Service Water (m3): Table 5: Compliance to quality: % No. of samples meeting the standard Colour Turbidity E-coli Free Chlorine Standard 15 ptu 5 Ntu 0 CFU/100ml 0.20-0.50 mg/l Final Water 100 100 100 100 Reservoirs ,, ,, ,, ,, Water in supply ,, ,, ,, ,, Table 6: Number of Samples tested Raw Examination Intermediate Final Water Reservoirs/Boosters Water in Supply Sewage Area Lab 30 93 30 0 7 Physic Chemical Central Lab 1 - 1 8 6 9 Area Lab ND ND ND 8 0 Bacteriological Central 1 - 1 8 6 4
Chemical used (kg/mth). Dose Rates, mg/litre Treatment Pre – Treatment Post Treatment Total Min Max Average Average Lab Test HTH - - 135 2mg/l 3mg/l 2.3mg/l 3mg/l Alum nil - - - - - - - Polymer 2250 - “ 2250 5.5 mg/l 7 mg/l 6.5mg/l 7mg/l NaCl 1200 - “ 1200 -- - 3.5mg/l 3.5mg/l Raw Water Pumped (m3): 601356 m3 Treated Water (m3): 559154 m3 Service Water (m3): Table 5: Compliance to quality: % No. of samples meeting the standard Colour Turbidity E-coli Free Chlorine Standard 15 ptu 5 Ntu 0 CFU/100ml 0.20-0.50 mg/l Final Water 100 100 100 100 Reservoirs ,, ,, ,, ,, Water in supply ,, ,, ,, ,, Table 6: Number of Samples tested Examination Raw Intermediate Final Water Reservoirs/Boosters Water in Supply Sewage Physic Chemical Area Lab 30 93 30 0 7 Central Lab 1 - 1 8 6 9 Bacteriological Area Lab ND ND ND 8 0 Central 1 - 1 8 6 4
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