Reducing dust, lead, dust mites, bacteria, and fungi in carpets by vacuuming

Old carpets may be reservoirs of dust, lead (Pb), and dust mite allergen. T he purpose of this study was to determine if the dust, Pb, dust mite allerg en, bacteria, and fungi on the surface of carpets could be reduced by 90% i n 1 week with the use of a Hoover Self Propelled Vacuum with Embedded Dirt Finder (HSPF). A high-volume surface sampler (HVS3) was used to measure sur face dust and pollutants before and after the use of the HSPF to remove dee p dust in carpets 12 to 20 years old in nine middle-class homes and two sma ll offices. The minimum, median, and maximum surface loading for the first and final samples are as follows: first fine dust loading: min 0.32 g/m(2), max 14.4 g/m(2), median 1.30 g/m(2); final fine dust loading: min 0.019 g/ m(2), max 0.289 g/m(2), median 0.102 g/m(2); first Pb loading: min 38 mu g/ m(2), max 3,871 mu g/m(2), median 471 mu g/m(2); final Pb loading: min 13 m u g/m(2), max 2,023 mu g/m(2), median 86 mu g/m(2); first mite loading: min 0.11 mu g/m(2), max 12.88 mu g/m(2), median 2.82 mu g/m(2); final mite loa ding: min 0.06 mu g/m(2), max 3.67 mu g/m(2), median 0.28 mu g/m(2). Data w ere insufficient to determine if the loadings of bacteria and fungi were re duced a similar amount. Six to 45 min/m(2) of vacuuming with the HSPF remov ed deep dust from these carpets. The median surface loadings of fine dust, Pb, and dust mite allergen in these 11 carpets were reduced by 91, 82, and 94%, respectively, in I to 15 h of vacuuming. The loading of the deep dust collected with the HSPF ranged from 8 to 171 g/m(2) with a median of 66 g/m (2).