Table 1.
Assessment of the bacterial load of aerosols from the River Taff by epifluorescence microscopy and the culture of general heterotrophic bacteria. (Samples were collected between November, 2010, and September, 2011; ND, not determined).
| Date (MM/DD/YY) | Filter Level | Culturable Counts (R2A Agar) Mean CFUs m−3 (Standard Deviation) |
Direct Counts (DAPI) Mean Cells m−3 (Standard Deviation) |
|---|---|---|---|
| 11.09.10 | Top | 1.11 × 104 (±3.21 × 103) | 1.89 × 105 (±9.62 × 104) |
| Upper Middle | 6.01 × 104 (±1.17 × 104) | 1.60 × 105 (±6.27 × 104) | |
| Lower Middle | ND | ND | |
| Bottom | 1.19 × 102 (±1.06 × 102) | ND | |
| 05.24.11 | Top | 1.58 × 104 (±8.17 × 1032) | 2.58 × 105 (±1.47 × 105) |
| Middle | ND | ND | |
| Bottom | ND | ND | |
| 06.15.11 | Top | 5.65 × 104 (±2.56 × 104) | ND |
| Middle | ND | ND | |
| Bottom | ND | ND | |
| 08.17.11 | Top | 5.86 × 104 (±4.23 × 103) | 5.20 × 107 (±2.46 × 107) |
| Upper middle | 1.27 × 105 (±2.45 × 104) | ND | |
| Lower middle | 2.12 × 102 (±9.68 × 101) | ND | |
| Bottom | 0 | ND | |
| 09.21.11 | Top | 3.50 × 104 (±2.19 × 104) | 2.75 × 105 (±1.64 × 105) |
| Upper middle | 2.26 × 103 (±1.73 × 102) | 3.91 × 104 (±1.16 × 104) | |
| Lower middle | 3.90 × 101 (±5.08 × 10°) | ND | |
| Bottom | 0 | ND |