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. Author manuscript; available in PMC: 2015 Jul 25.
Published in final edited form as: Sci Total Environ. 2014 Oct 22;505:487–493. doi: 10.1016/j.scitotenv.2014.10.004

Table 1.

Percentage of surface water samples positive for somatic and F+ coliphages and geometric mean concentrations (PFU per 100 ml) by site.

Site Somatic coliphages
F+ coliphages
% positive (na) Geo. mean (PFU per 100 ml) Min, max % positive (na) Geo. mean (PFU per 100 ml) Min, max
All A samples 97 (63) 20 <1, 1000 83 (54) 6.3 <1, 82
All B samples 99 (88) 28 <1, 1000 87 (77) 7.2 <1, 99
1A 85 (11) 5.5 <1, 187 85 (11) 2.5 <1, 18
1B 100 (13) 18 3.0, 104 77 (13) 3.0 <1, 69
2A 100 (26) 18 2.0, 67 77 (20) 9.2 <1, 82
2B 100 (26) 22 1.0, 172 88 (23) 8.6 <1, 83
3A 100 (26) 45 4.0, 1000 88 (23) 6.7 <1, 63
3B 96 (25) 35 <1, 1000 77 (20) 4.5 <1, 99
4B 100 (12) 12 2.0, 30 100 (12) 20 3.0, 84
5B 100 (12) 96 8.0, 766 100 (12) 13 4.0, 74
a

n = number of samples positive for coliphage.