Table 1.
Water source used for drinking water production, total organic carbon, easily assimable organic carbon, ATP concentration, and biofilm formation rate in the treated drinking water of five treatment plantsa
| Plant | Water source | TOC (mg C liter−1) | AOC (μg C liter−1) | BFR (pg ATP cm−2 day−1) | ATP concn (ng liter−1) |
|---|---|---|---|---|---|
| SW1 | Surface water | 1.6 ± 0.1 | 14.7 ± 4.0 | 26.0 | 4.2 ± 2.4 |
| SW2 | Surface water | 2.3 ± 0.3 | 4.5 ± 0.9 | 0.64 | 1.2 ± 0.6 |
| SW3 | Surface water | 3.1 ± 0.5 | 20.4 ± 7.7 | 4.5 | 4.4 ± 1.3 |
| SW4 | Surface water | 2.5 ± 0.7 | 18.4 ± 6.9 | 15.2 | 4.2 ± 1.0 |
| GW1 | Anoxic groundwater | 7.9 ± 0.6 | 14.8 ± 5.9 | 33.1 | 6.2 ± 1.2 |
a
TOC, total organic carbon; AOC, easily assimilable organic carbon; BFR, biofilm formation rate; SW, surface water treatment plant; GW, groundwater treatment plant.