Table 4.
Median and range of THM concentrations (μg/m3) in exhaled air: baseline and post-water activity by study site.
| CHCl3 |
CHBrCl2 |
CHBr2Cl
|
CHBr3 |
TTHM
|
||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Activity | NC site | TX site | NC site | TX site | NC site | TX site | NC site | TX site | NC site | TX site |
| Baseline day 1 | 5 (2–6) | 1 (1–2) | 2 (BDL–5) | 2 (2–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 9 (4–13) | 6 (5–6) |
| Hot beverage | 4 (2–5) | 2 (0.8–5) | 2 (BDL–5) | 3 (1–4) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 7 (5–14) | 7 (6–8) |
| Shower | 24 (16–51) | 6 (5–8) | 6 (2–8) | 3 (3–4) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 28 (26–61) | 11 (9–14) |
| Clothes washer | 11 (3–17) | 1 (0.7–2) | 3 (BDL–6) | 1 (BDL–2) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 15 (6–25) | 4 (4–5) |
| Hand washing | 6 (3–11) | 1 (0.9–1) | 2 (BDL–2) | 2 (1–5) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 9 (5–15) | 5 (4–12) |
| Automatic dishwasher | 4 (2–4) | 3 (3–4) | 1 (BDL–2) | 2 (2–2) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 7 (5–15) | 5 (4–12) |
| Baseline day 2 | 5 (2–12) | 1 (BDL–2) | 2 (1–9) | 0.7 (BDL–2) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 9 (6–15) | 4 (3–6) |
| Bath | 15 (11–22) | 7 (4–9) | 3 (1–4) | 3 (3–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 20 (14–26) | 13 (9–13) |
| Clothes washer II | 12 (6–13) | 2 (2–3.5) | 2 (1–8) | 2 (1–2) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 16 (9–46) | 6 (5–7) |
| Hand dish washing | 14 (5–18) | 3 (3–4) | 2 (BDL–3) | 2 (1–5) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 18 (7–22) | 7 (6–11) |
| Indirect shower exposure | 5 (2–8) | 2 (1–2) | 0.8 (BDL–2) | 2 (2–2) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 8 (4–11) | 6 (5–6) |
BDL, below detection limit (detection limits are 0.5 μg/m3 for CHCl3, 0.7 μg/m3 for CHBrCl2, 0.8 μg/m3 for CHBr2Cl, and 1.0 μg/m3 for CHBr3). Values shown in parentheses are ranges. Ranges are not included if all samples were at or below detection.