TABLE 2.

Results of coupon analyses at the sites of Latvia and France

Site	Biofilm collector installation date	Biofilm collector retention times in water supply (days)	Avg HPC (cells/cm2)	CFU/cm2 as determined by culture methods		Total no. of bacteria (cells/cm2)
				E. coli	Coliforms
A1	January 2005	68	6.9 × 103	0	0	9.84 × 106
A2	January 2005	68	4.8 × 103	0	0	6.82 × 106
A3	January 2005	68	9.4 × 104	0	0	1.30 × 107
D1	January 2005	119	1.0 × 105	0	0	4.4 × 106
	May 2005	175	3.7 × 104	0	0	≥108
D2	January 2005	119	1.2 × 104	0	0	6.4 × 106
	May 2005	175	1.5 × 104	0	0	8.3 × 107
D3	January 2005	119	1.2 × 104	0	0	8.0 × 107
M1	January 2005	119	1.7 × 104	0	0	1.6 × 105
M2	January 2005	119	6.1 × 104	0	0	5.5 × 105
T1	January, 2005	119	2.9 × 102	0	0	4.3 × 107
	May 2005	175	2.2 × 103	0	0	2.1 × 107
T2	January 2005	119	4.6 × 103	0	0	1.3 × 107
	May 2005	175	4.7 × 104	0	0	1.2 × 107
R1	December 2005	173	8.5 × 104	0	0	1.7 × 107
	December 2005	166	1.3 × 106	0	1.1	1.6 × 107
B1	May 2006	35	6.9 × 107	0	0	≥108
B2	December 2005	145	2.7 × 104	0	0	8.9 × 106
B3	December 2005	101	8.7 × 106	0	0	1.3 × 107
C1	December 2005	41	4.8 × 104	0	0	2 × 105