Table 2.
River | location and Season | N | Non-cancer hazard quotient Consumption | Excess cancer risk Consumption | ||||
---|---|---|---|---|---|---|---|---|
Average | High | p-value | Average | High | p-value | |||
Upriver | 37 | |||||||
Wet | 13 | 2.0×10−4 | 1.3×10−3 | 3.8×10−6 | 3.1×10−5 | |||
Dry | 24 | 4.0×10−4 | 3.3×10−3 | 0.07 | 5.6×10−6 | 4.6×10−5 | 0.31 | |
| ||||||||
Superfund Megasite | 64 | |||||||
Wet | 28 | 9.3×10−4 | 7.6×10−3 | 6.7×10−6 | 5.4×10−5 | |||
Dry | 36 | 3.3×10−3 | 2.7×10−2 | 0.004 | 2.6×10−5 | 2.1×10−4 | <0.001 | |
| ||||||||
Superfund No tar events | 45 | |||||||
Wet | 22 | 3.6×10−4 | 3.0×10−3 | 6.5×10−6 | 5.3×10−5 | |||
Dry | 23 | 2.9×10−3 | 2.4×10−2 | <0.001 | 2.2×10−5 | 1.8×10−4 | <0.001 | |
| ||||||||
RMs 7W & 5W | 28 | |||||||
no tar | 19 | 1.1×10−3 | 8.5×10−3 | 1.5×10−5 | 1.2×10−4 | |||
tar | 9 | 4.5×10−3 | 3.7×10−2 | 0.02 | 9.1×10−5 | 7.4×10−4 | <0.001 | |
| ||||||||
Downriver | 10 | |||||||
Wet | 4 | 3.4×10−4 | 1.5×10−2 | 9.1×10−6 | 7.4×10−5 | |||
Dry | 6 | 1.9×10−3 | 2.8×10−3 | 0.11 | 1.8×10−5 | 1.5×10−4 | 0.18 | |
Threshold = 1 | Threshold = 1.0 ×10−6 |
Mann-Whitney rank sum tests within location between seasons.
P-values are for comparisons between seasons
All test are at α = 0.05.