Resid­ual Pes­ti­cides

Consumer Voice - - Ro Water Purifiers -

In In­dia, high con­cen­tra­tions of both organochlo­rine and organophos­pho­rous pes­ti­cides have been found in sur­face and ground wa­ter sam­ples. Re­verse-os­mo­sis wa­ter fil­ters are ex­pected to re­move pes­ti­cide residues. We tested the 10 brands for pes­ti­cide residues. They were all able to re­duce the pes­ti­cide residues and scored equally well. FOR TOXIC MET­ALS/MA­TE­RI­ALS

The Bureau of In­dian Stan­dards (BIS) has spec­i­fied re­quire­ments for re­moval/re­duc­tion of heavy met­als in IS:16240. We tested the 10 brands for pres­ence of the fol­low­ing heavy met­als:

Ar­senic: As many as six brands – Tata Swach, Zero B, Kent, Aqua­guard, Elec­trolux and Usha – did not meet the re­quire­ment (a max­i­mum 0.01 mg/l). Copper: None of the brands met the re­quire­ment set by In­dian Stan­dard (0.05 mg/l).

Mer­cury: All the brands more or less met the spec­i­fied re­quire­ment – mi­nor de­vi­a­tions were ob­served in Pureit, Aqua­guard and Usha.

Cad­mium: Mi­nor de­vi­a­tion was ob­served in one brand, Pureit. All other brands met the stan­dard re­quire­ment.

Iron: All the brands met the re­quire­ments, with the ex­cep­tion of de­vi­a­tion in two brands, Whirlpool and Usha. re­quire­ments. Brand LG Whirlpool AO Smith Usha Aqua­guard Elec­trolux Pureit Kent Zero B Tata Swach

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