W191 & H191 Preliminary Results

Shipped: April 8, 2019

W191 Preliminary results

Sample Number	Organism	Total Colony Count (Group Means)
		Membrane Filtration Method cfu/100mL
		Total coliforms	Thermotolerant coliforms	E.coli
W191-1	E. coli	68±8.1, MU 12.1%	65±8.2, MU 12.7%	68±8.1, MU 12.1%
W191-2	Enterobacter species	61±8.8, MU 14.7%	0	0
W191-3	Enterobacter species	15±3.2, MU 22.1%	0	0
W191-4	Enterobacter species	15±3.2, MU 22.1%	0	0

MU: measure of uncertainty

H191 Preliminary results

Samples	Organism	Total Colony Count (Group Means)
H191-1	Enterobacter species	96±29.1, MU 30.4%
H191-2	No organisms	0
H191-3	E. coli	77±7.8, MU 10.2%
H191-4	E. coli	209±22.9, MU 11.0%

MU (%): Measurement Uncertainty in percentage outliers excluded in group means