Table 2.
Median temperature and concentration of THM in air (μg/m3) for baseline and activities with at least a 2-fold increase in blood concentration for at least one participant.
| Air temp (°C)
|
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 | NC site | TX site |
| Baseline day 1 | 24 (22–24) | 24 (23–25) | 4 (2–10) | 2 (1–2) | 3 (BDL–7) | 2 (2–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 8 (5–19) | 5 (5–7) |
| Hot beverage | 24 (24–25) | 23 (23–24) | 7 (3–10) | 2 (2–2) | 2 (1–4) | 3 (2–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 10 (6–16) | 6 (6–7) |
| Shower | 25 (24–32) | 24 (20–28) | 318 (219–351) | 67 (50–70) | 54 (31–68) | 23 (20–25) | 9 (4–13) | 4 (3–6) | BDL (—) | BDL (—) | 384 (255–431) | 95 (74–102) |
| Clothes washer | 24 (24–27) | 27 (25–27) | 21 (7–25) | 4 (2–5) | 7 (BDL–8) | 2 (0.7–3) | BDL (BDL–2) | BDL (—) | BDL (—) | BDL (—) | 31 (9–34) | 4 (2–5) |
| Hand washing | 24 (22–27) | 23 (22–23) | 49 (19–85) | 3 (3–5) | 10 (3–13) | 2 (1.3–2.3) | 2 (BDL–2) | BDL (—) | BDL (—) | BDL (—) | 62 (23–101) | 6 (6–9) |
| Automatic dishwasher | 24 (24–25) | 25 (24–26) | 8 (4–12) | 5 (4–5) | 2 (BDL–3) | 3 (3–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 11 (6–18) | 9 (9–10) |
| Baseline day 2 | 24 (23–24) | 23 (21–24) | 3 (2–4) | 1 (0.8–2) | 1 (BDL–1) | 1 (1–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 6 (4–7) | 4 (4–7) |
| Bath | 24 (22–24) | 23 (21–24) | 71 (49–98) | 14 (8–61) | 12 (9–14) | 7 (4–15) | 2 (1–3) | 1.4 (BDL–2) | BDL (—) | BDL (—) | 88 (60–112) | 24 (13–79) |
| Clothes washer II | 24 (24–25) | 27 (27–28) | 9 (8–33) | 9 (4–13) | 2 (1–5) | 2 (0.9–3) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 12 (11–39) | 14 (6–17) |
| Hand dish washing | 24 (24–25) | 24 (24–28) | 8 (6–17) | 5 (3–9) | 2 (1–4) | 1 (1–5) | BDL (—) | BDL (—) | BDL (—) | BDL (—) | 11 (9–23) | 8 (6–15) |
| Indirect shower exposure | 24 (22–25) | 24 (22–24) | 142 (117–370) | 75 (63–86) | 30 (20–114) | 27 (25–29) | 7 (3–11) | 5 (3–7) | BDL (—) | BDL (—) | 176 (151–495) | 108 (100–115) |
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.