Table 1.

Pesticide exposure dose extrapolated from human to rodent (mouse and rat)

Risk Factor	Primary Route of Exposure	Exposure Limit/Maximum Contaminat Level	Extrapolated Daily Dose in Mice	Extrapolated Daily Dose in Rats
Paraquat	Inhalation	0.1 mg/m3 †	1.22 mg/m3	0.6 mg/m3
	Drinking Water	20 ppb	245μg/kg	123μg/kg

^†Time Weighted Average: 8-hour total weight average, particulate size dependent. Inhalation dose calculated using the fixed allometric exponent: X_h = X_a (M_a/M_h)^1 - .67 without Uncertainty Factors [47], however dosage is dependent on particulate size and duration of exposure. Oral dose calculated using the U.S. FDA conversion guidelines, Human Equivalent Dose = animal dose in mg/kg x (animal weight in kg / human weight in kg)^0.33 [46].