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Table 2 Mean and median of sampled THM levels (ug/l)

From: Case control study of the geographic variability of exposure to disinfectant byproducts and risk for rectal cancer

  Bromoform Bromodichloro-methane Chloroform Chlorodibromo-methane Total 551
Mean 1.30 8.72 19.75 4.11 35.07
Median 0.45 8.48 17.61 3.80 33.00