Table 1.

Fecal Indicator Bacteria Levels (Most Probable Number [MPN] E. coli) by Pathway^a

	units	N	E. coli
			geometric meanb	IQR	% positive
tube well	100 mL	1676	1	0	24
stored water	100 mL	1627	4	20	58
pond	100 mL	824	5393	14350	98
child hands	2 hands	1772	7	8	40
soil	dry g	1799	117979	938650	94
food	dry g	1650	2	18	59
flies	fly	612	715	9670	54

^aInterquartile range (IQR) is the difference between the 25th and 75th percentiles; IQR includes samples with zero E. coli detected.

^bGeometric mean calculated by including value of 0.5 MPN for samples under the detection limit.