Durban Height Waterworks, Design capacity: 615 ML/d, Period: 01 July June 2014

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1 Durban Height Waterworks, Design capacity: 615 ML/d, Period: 01 July June 2014 Durban Heights WW Raw Durban Heights WW Final Determinands Units Minimum Average Percentile Maximum Minimum Average Percentile Maximum E. coli count per 100 ml Not Detected Giardia species count per 10 L Not Detected Cryptosporidium species count per 10 L Not Detected Total chlorine mg/l Fluoride g/l < * * < < < < Nitrate as N mg/l < * 0.43* Nitrite as N mg/l <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < Sulphate mg/l Antimony g/l <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 < Arsenic g/l <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 < Cadmium g/l <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 <1.00 < Chromium g/l < * 6.22* 6.22 <5.00 <5.00 <5.00 < Cobalt g/l <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 < Copper mg/l <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 <0.05 < Cyanide (Recoverable) g/l <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 < Iron mg/l < * 0.03* Lead g/l < * 55.68* <4.00 <4.00 <4.00 < Manganese mg/l < * 0.01* Mercury g/l <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 < Nickel g/l < * 50.00* <10.00 <10.00 <10.00 < Selenium g/l <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 <2.00 < Vanadium g/l <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 < Total organic carbon mg/l Chloroform g/l Bromoform g/l < * 1.40* Dibromochloromethane g/l Bromodichloromethane g/l Total dissolved solids mg/l Ammonia as N mg/l <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 <0.04 < Colour mg/l Pt-Co Turbidity NTU Conductivity ms/m Chloride mg/l Sulphate mg/l Zinc mg/l < * 0.15* 0.17 <0.03 <0.03 <0.03 < Sodium mg/l Iron mg/l < * 0.03* Manganese mg/l < * 0.01* Phenols g/l <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 <10.00 <

2 Percentile Determinands Units Minimum Average Percentile Maximum Minimum Average Maximum Somatic Coliphages count per 10 ml Not Detected Heterotrophic plate 37 o C count per ml Coliforms count per 100 ml > ph ph units to 9.7 Free Chlorine mg/l # Total Chlorine mg/l No limit Turbidity NTU Aluminium g/l DETERMINANDS WITH NO LIMITS SPECIFIED IN Cyanide (Free) g/l <10.00 <10.00 <10.00 < No limit Suspended solids mg/l < * 6.00* 6.00 <4.00 <4.00 <4.00 <4.00 No limit Trihalomethanes g/l No limit SOC mg C/L No limit have been adopted from the SANS 241: 2011 Drinking Water specification. # Umgeni Water Site Specific Internal Operating

3 Durban Heights final 2, Period: 01 July June 2014 Durban Heights final 2 Determinands Units Minimum Average Percentile Maximum E. coli count per 100 ml Not Detected Total chlorine mg/l Fluoride g/l < < < < Nitrate as N mg/l Nitrite as N mg/l <0.05 <0.05 <0.05 < Sulphate mg/l Antimony g/l <2.00 <2.00 <2.00 < Arsenic g/l <2.00 <2.00 <2.00 < Cadmium g/l <1.00 <1.00 <1.00 < Chromium g/l <5.00 <5.00 <5.00 < Cobalt g/l <10.00 <10.00 <10.00 < Copper mg/l <0.05 <0.05 <0.05 < Cyanide (Recoverable) g/l <10.0 <10.0 <10.0 < Iron mg/l < * 0.03* Lead g/l <4.00 <4.00 <4.00 < Manganese mg/l <0.01 <0.01 <0.01 < Mercury g/l <0.50 <0.50 <0.50 < Nickel g/l <10.00 <10.00 <10.00 < Selenium g/l <2.00 <2.00 <2.00 < Vanadium g/l <10.00 <10.00 <10.00 < Total organic carbon mg/l Chloroform g/l Bromoform g/l < * 5.70* Dibromochloromethane g/l Bromodichloromethane g/l Dissolved solids mg/l Ammonia as N mg/l <0.04 <0.04 <0.04 < Colour mg/l Pt-Co <1.00 <1.00 <1.00 < Turbidity NTU Conductivity ms/m Chloride mg/l Sulphate mg/l Zinc mg/l <0.03 <0.03 <0.03 < Sodium mg/l Iron mg/l < * 0.03* Manganese mg/l <0.01 <0.01 <0.01 < Phenols g/l <10.00 <10.00 <10.00 < Somatic Coliphages count per 10 ml Not Detected Heterotrophic plate 37 o count per ml C Coliforms count per 100 ml ph ph units to 9.7 Free Chlorine mg/l # Total Chlorine mg/l No limit Turbidity NTU Aluminium g/l DETERMINANDS WITH NO LIMITS SPECIFIED IN Suspended solids mg/l <4.00 <4.00 <4.00 <4.00 No limit Trihalomethanes g/l No limit Temperature ºC No limit have been adopted from the SANS 241: 2011 Drinking Water specification. # Umgeni Water Site Specific Internal Operating

4 Durban Heights final 3, Period: 01 July June 2014 Durban Heights final 3 Determinands Units Minimum Average Percentile Maximum E. coli count per 100 ml Not Detected Total chlorine mg/l Fluoride g/l < < < < Nitrate as N mg/l Nitrite as N mg/l <0.05 <0.05 <0.05 < Sulphate mg/l Antimony g/l <2.00 <2.00 <2.00 < Arsenic g/l <2.00 <2.00 <2.00 < Cadmium g/l <1.00 <1.00 <1.00 < Chromium g/l <5.00 <5.00 <5.00 < Cobalt g/l <10.00 <10.00 <10.00 < Copper mg/l <0.05 <0.05 <0.05 < Cyanide (Recoverable) g/l <10.00 <10.00 <10.00 < Iron mg/l < * 0.03* Lead g/l <4.00 <4.00 <4.00 < Manganese mg/l <0.01 <0.01 <0.01 < Mercury g/l <0.50 <0.50 <0.50 < Nickel g/l <10.00 <10.00 <10.00 < Selenium g/l <2.00 <2.00 <2.00 < Vanadium g/l <10.00 <10.00 <10.00 < Total organic carbon mg/l Chloroform g/l Bromoform g/l < * 1.87* Dibromochloromethane g/l Bromodichloromethane g/l Total dissolved solids mg/l Ammonia as N mg/l < * 0.04* Colour mg/l Pt-Co < * 1.50* Turbidity NTU Conductivity ms/m Chloride mg/l Sulphate mg/l Zinc mg/l <0.03 <0.03 <0.03 < Sodium mg/l Iron mg/l < * 0.03* Manganese mg/l <0.01 <0.01 <0.01 < Phenols g/l <10.00 <10.00 <10.00 < Somatic Coliphages count per 10 ml Not Detected Heterotrophic plate count 37 o C count per ml Coliforms count per 100 ml > ph ph units to 9.7 Free Chlorine mg/l # Total Chlorine mg/l No limit Turbidity NTU Aluminium g/l < * 61.03* DETERMINANDS WITH NO LIMITS SPECIFIED IN Suspended solids mg/l < * 2.90* 4.00 No limit Trihalomethanes g/l No limit Ammonia (Free) mg N/L <0.00 <0.00 <0.00 <0.00 No limit Molybdenum µg Mo/L <10.00 <10.00 <10.00 <10.00 No limit Potassium mg /L No limit 21 cfu/ml No limit Total Hardness mg CaCO 3 / L No limit 2-MIB ng/l <5.00 <5.00 <5.00 <5.00 No limit have been adopted from the SANS 241: 2011 Drinking Water specification. # Umgeni Water Site Specific Internal Operating

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