The Average Daily Dose from inhalation of contaminants in reclaimed water (ADDI) can be estimated using the following equation:



ContaminantR = Concentration of chemical in reclaimed water (mass/volume),
VR = Daily respiratory volume during the period of exposure (volume/time),
BAF = Bioavailability adjustment factor,
F = Number of exposure events during the exposure period divided by the number of days in the exposure period (events/time),
D1 = Average duration of each exposure event (time/event),
D2 = Duration of the exposure period (time),
BW = Average body weight (e.g., 70 kg),
AP = Averaging period (time),
C = Appropriate units conversion factor.

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