| NTM Negative | NTM Positive | Significance (p value) |
---|---|---|---|
Sampling Site Factor (Mean ± SD) |  |  |  |
Site elevation (meters above sea level)* | 44.75 ± 40.12 | 43.78 ± 39.99 | 0.977 |
S | 44.94 ± 41.92 | 44.88 ± 38.86 | 0.680 |
W | 43.51 ± 26.54 | 43.26 ± 40.63 | 0.751 |
Pipe Diameter (cm) | 438.01 ± 459.91 | 435.21 ± 461.92 | 0.954 |
S | 403.23 ± 417.56 | 489.15 ± 513.25 | 0.211 |
W | 553.94 ± 571.58 | 409.59 ± 434.81 | 0.103 |
Mains Age (years) | 46.56 ± 19.53 | 48.94 ± 19.15 | 0.246 |
S | 46.15 ± 19.83 | 50.97 ± 17.74 | 0.091 |
W | 47.91 ± 18.71 | 47.97 ± 19.77 | 0.987 |
Pipe material | Â | Â | Â |
Asbestos cement | 28 (30.8% | 63 (69.2) | 0.166 |
Cement lined†| 77 (41.8) | 107 (58.2) | |
PVC | 6 (42.9) | 8 (57.1) | |
Cast iron spun lined | 30 (35.7) | 54 (64.3) | |
Other‡ | 7 (63.3) | 4 (36.4) | |
Sample type N (%) | Â | Â | Â |
Distribution | 86 (37.1) | 146 (62.9) | 0.668 |
Reservoir | 36 (39.1) | 56 (60.9) | |
Trunk Main | 26 (43.3) | 34 (56.7) | |
Surface water source N (%) | Â | Â | Â |
Mt Crosby | 120 (38.6) | 191 (61.4) | 0.995 |
Pine | 14 (37.8) | 23 (62.2) | |
Mixed | 14 (38.9) | 22 (61.1) |