Residential: Default exposure doses for chronic exposure in drinking water and non-cancer hazard quotients

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Residential: Default exposure doses for chronic exposure to 1,2,3-TRICHLOROPROPANE in drinking water at 3.5 mg/L along with non-cancer hazard quotients*

Air Example for PHAGM Screening Analysis
Exposure Group
CTE Dose (mg/kg/day)
CTE Non-cancer Hazard Quotient
RME Dose (mg/kg/day)
RME Non-cancer Hazard Quotient

Birth to < 1 year

 0.23 45 † 0.50 100 †

1 to < 2 years

 0.095 19 † 0.27 55 †

2 to < 6 years

 0.076 15 † 0.20 39 †

6 to < 11 years

 0.056 11 † 0.15 31 †

11 to < 16 years

 0.039 7.9 † 0.12 24 †

16 to < 21 years

 0.038 7.5 † 0.12 24 †

Total Child

 – – – –

Adult

 0.054 11 † 0.14 27 †

Pregnant Women

 0.042 8.4 † 0.12 25 †

Lactating Women

 0.080 16 † 0.17 34 †

Source: ABC Drinking Water Sampling Data, 2020

Abbreviations: CTE = central tendency exposure (typical); mg/kg/day = milligram chemical per kilogram body weight per day; mg/L = milligram chemical per liter water; RME = reasonable maximum exposure (higher)

* The calculations in this table were generated using ATSDR’s PHAST. The non-cancer hazard quotients were calculated using the chronic (greater than 1 year) minimal risk level of 0.005 mg/kg/day.

† A shaded cell indicates the hazard quotient exceeds the non-cancer health guideline, which ATSDR evaluates further.