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Table 5 Summary statistics on the estimated intake and hazard quotients (HQ) for all study children.a

From: Pesticides in house dust from urban and farmworker households in California: an observational measurement study

      Select Summary Statistics for HQs based on 54 dust samples from farmworker and urban children
Analyte RfD (mg/kg/dy)b # samples with concentration >LOD Range of Intake (mg/kg/day)c p50 p75 p95 Max
Organophosphates    Min Max     
diazinon 0.0002 36 -- 7.0 × 10-07 2.5 × 10-04 4.3 × 10-04 1.6 × 10-03 3.5 × 10-03
chlorpyrifos 0.00003 25 -- 1.1 ×10-06 -- 4.9 × 10-03 2.3 × 10-02 3.8 × 10-02
malathion 0.07 5 -- 4.9 × 10-06 -- -- 2.8 × 10-06 7.0 × 10-05
tetrachlorvinphos 0.04 4 -- 1.5 × 10-06 -- -- 2.2 × 10-05 3.9 × 10-05
Pyrethroids         
cis-permethrind 0.25 54 5.4 × 10-08 1.3 × 10-04 9.7 × 10-06 2.0 × 10-05 8.4 × 10-05 5.1 × 10-04
trans-permethrind 0.25 54 8.6 × 10-08 2.2 × 10-04 1.7 × 10-05 3.2 × 10-05 1.6 × 10-04 8.9 × 10-04
cypermethrin 0.06 32 -- 6.4 × 10-05 2.5 ×10-05 8.4 × 10-05 4.8 × 10-04 1.1 × 10-03
bifenthrin 0.015 15 -- 1.1 × 10-05 -- 4.4 × 10-06 2.6 × 10-05 7.5 × 10-04
sumithrin 0.0007 9 -- 3.7 × 10-06 -- -- 3.2 × 10-03 5.2 × 10-03
deltamethrin 0.0033 8 -- 9.0 × 10-05 -- -- 6.7 × 10-03 2.7 × 10-02
prallethrin 0.025 1 -- 1.9 × 10-07 -- -- -- 7.4 × 10-06
esfenvalerate 0.02 1 -- 4.4 × 10-07 -- -- -- 2.2 × 10-05
Others         
chlorthal-dimethyl 0.01 28 -- 1.8 × 10-07 3.0 × 10-06 7.2 × 10-06 1.5 × 10-05 1.8 × 10-05
piperonyl butoxide 0.16 49 -- 2.2 × 10-04 5.0 × 10-06 1.7 × 10-05 2.5 × 10-04 1.4 × 10-03
  1. a. A hazard quotient (HQ) was calculated as the ratio of the potential dust intake to the respective analyte reference dose (RfD). The HQ was only calculated for those analytes for which an RfD was available. b. Chronic population adjusted doses (cPADs) were used as the reference dose for chlorpyrifos (cPAD for children and females 13-50 years of age) and deltamethrin. Sources: IRIS database http://cfpub.epa.gov/ncea/iris/index.cfm?fuseaction=iris.showSubstanceList and EPA's Pesticide Registration Status: http://www.epa.gov/opp00001/reregistration/status.htm. c. Intake was calculated by multiplying the toxicant dust concentration by an ingestion rate of 0.10 g/day (100 mg/day) then dividing by the child-specific body weight (kg). d. The RfD available for "permethrin" was used for each individual isomer in our calculations. Notation: '--' Value is not reported since dust concentrations were less than the limit of detection.