Table 2.
Ranks of median percent recoveries, variability rank scores, and the ranks based on the RCV in lake water samples using five filtration systemsa
| Filtration system |
E. coli |
E. faecalis |
MS2 coliphage |
Adenovirus |
Norovirus GII |
Enterovirus |
Avian influenza virus |
Cryptosporidium |
Giardia |
||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | R | RCV | R′ | |
| Glass wool | 4 | 2.32 | 4 | 4 | 4.88 | 5 | 5 | 1.4 | 4 | 1 | 0.29 | 1 | 2 | 1.28 | 2 | 3 | 1.2 | 4 | 5 | 6.70 | 5 | 4 | 3.24 | 4 | 4 | 4.24 | 4 |
| NanoCeram | 5 | 2.8 | 5 | 5 | 4.05 | 4 | 1 | 0.16 | 1 | 5 | 4.1 | 5 | 5 | 5.15 | 5 | 1 | 0.67 | 1 | 3 | 2.25 | 4 | 5 | 4.35 | 5 | 5 | 8.65 | 5 |
| ViroCap | 1 | 0.15 | 1 | 3 | 1.29 | 3 | 4 | 2.32 | 5 | 4 | 4 | 4 | 4 | 3.88 | 4 | 2 | 1.14 | 3 | 4 | 1.68 | 2 | 1 | 0.43 | 1 | 2 | 1.24 | 3 |
| Automatic UF | 2 | 0.94 | 2 | 2 | 1.28 | 2 | 2 | 0.28 | 2 | 2 | 0.72 | 2 | 1 | 0.47 | 1 | 4 | 0.68 | 2 | 2 | 1.76 | 3 | 3 | 0.45 | 2 | 3 | 0.57 | 2 |
| Dead-end UF | 3 | 0.96 | 3 | 1 | 0.36 | 1 | 3 | 0.54 | 3 | 3 | 1.14 | 3 | 3 | 3.45 | 3 | 5 | 4.2 | 5 | 1 | 0.63 | 1 | 2 | 0.52 | 3 | 1 | 0.18 | 1 |
a
Ranks of 1 and 2 are shaded for each target microorganism. R is the rank of the median percentage of recoveries in all lake water samples, with the highest median recovery receiving the lowest rank. The lowest R indicates the highest recovery. RCV is the variability rank score, calculated by multiplying the rank (R) times the median coefficient of variation for the three multiple lake water samples. R′ is the rank of the RCVs, with the lowest value representing the filter with the lowest RCV.