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

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

	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

ISSN: 1476-072X