• Pure It emerges as top performer, followed by Aqua Sure and Kent Gold. • Aqua Sure is the value-for-money brand. • Only Pure It, Aqua Sure and Unitex were able to reduce E. coli up to 100 per cent when tested at
different intervals. • Only Pure It was able to reduce MS2 virus up to 100 per cent. Rest all reduced it between 90 per cent
and 99.99 per cent. • None of the brands completely removed heavy metals such as arsenic. The reduction was found between 9.4 per cent and 93.05 per cent. In any case, only a few brands claim to do so. Pesticide was reduced by 28 per cent in Aqua Fresh, by 8 per cent Bajaj, and by 70 per cent Tata Swach. All other brands removed pesticide (such as lindane) up to 100 per cent from input water. • All the brands were able to reduce the turbidity up to an acceptable level (desirable to be below 1 NTU as against 25 NTU in input water). Filtration rate was found highest in Unitex and Kent Gold. Refill cartridges are easily available at retail shops.