Table 2. Study parameters (Mean ± SD) summarized by urban (U) and rural (R) study sites and Tamil calendar seasons.
| TS1 (Harsh warmth) Jun 15–Aug 14 | TS2 (Dark clouds) Aug 15–Oct 14 | TS3 (Chill, cold) Oct 15–Dec 14 | TS4 (Early mist) Dec 15–Feb 14 | TS5 (Late mist) Feb 15–Apr 14 | TS6 (Light warmth) Apr 15–Jun 14 | ||
|---|---|---|---|---|---|---|---|
| Meteorological parameters# | |||||||
| Temperature (°C) | U/R | 30.61 ± 1.17 | 28.92 ± 0.70 | 26.20 ± 1.43 | 24.23 ± 1.16 | 28.87 ± 1.82 | 32.51 ± 1.34 |
| Rainfall (mm) | U/R | 23.05 ± 28.35 | 33.23 ± 33.65 | 40.43 ± 27.74 | 7.37 ± 20.26 | 2.99 ± 11.84 | 12.44 ± 19.94 |
| Diarrheal episodes | |||||||
| Weekly counts | U | 1.55 ± 1.37 | 2.22 ± 1.80 | 1.41 ± 1.62 | 2.94 ± 3.13 | 2.38 ± 2.99 | 1.88 ± 1.55 |
| R | 0.73 ± 0.9 | 0.89 ± 0.96 | 0.65 ± 1.06 | 1.24 ± 1.3 | 0.57 ± 0.85 | 1.25 ± 1.04 | |
| Public domain water quality | |||||||
| pH | U | 7.92 ± 0.27 | 7.91 ± 0.45 | 7.25 ± 0.54 | 7.94 ± 0.57 | 7.98 ± 0.37 | 7.81 ± 0.47 |
| R | 7.83 ± 0.39 | 7.83 ± 0.46 | 7.61 ± 0.45 | 7.46 ± 0.52 | 7.84 ± 0.37 | 7.53 ± 0.30 | |
| NO3- (ppm) | U | 17 ± 3 | 24 ± 5 | 21 ± 4 | 16 ± 4 | 16 ± 2 | 17 ± 3 |
| R | 15 ± 2 | 22 ± 4 | 27 ± 5 | 18 ± 5 | 15 ± 2 | 17 ± 2 | |
| TDS (ppm) | U | 849 ± 134 | 805 ± 92 | 689 ± 84 | 715 ± 107 | 740 ± 83 | 884 ± 149 |
| R | 713 ± 108 | 760 ± 108 | 741 ± 132 | 769 ± 133 | 744 ± 157 | 857 ± 312 | |
| TC (CFU/100mL) | U | 5,536 ± 6,450 | 5,137 ± 4,540 | 5,989 ± 3,703 | 4,998 ± 3,786 | 4,257 ± 6,381 | 2,284 ± 4,305 |
| R | 4,142 ± 4,464 | 5,673 ± 4,261 | 5,852 ± 3,733 | 4,020 ± 4,252 | 2,425 ± 3,104 | 2,200 ± 4,545 | |
| FC (CFU/100mL) | U | 213 ± 189 | 264 ± 384 | 207 ± 167 | 162 ± 170 | 413 ± 661 | 390 ± 634 |
| R | 153 ± 159 | 190 ± 166 | 205 ± 182 | 108 ± 231 | 207 ± 313 | 329 ± 493 | |
| Private domain water quality | |||||||
| pH | U | 7.99 ± 0.25 | 7.91 ± 0.74 | 7.38 ± 0.71 | 7.36 ± 0.60 | 7.86 ± 0.20 | 8.13 ± 0.31 |
| R | 7.73 ± 0.39 | 7.77 ± 0.48 | 7.48 ± 0.52 | 7.32 ± 0.61 | 7.62 ± 0.39 | 7.56 ± 0.28 | |
| NO3- (ppm) | U | 17 ± 2 | 23 ± 3 | 20 ± 5 | 19 ± 5 | 16 ± 3 | 17 ± 2 |
| R | 16 ± 2 | 25 ± 4 | 25 ± 4 | 19 ± 4 | 16 ± 2 | 17 ± 2 | |
| TDS (ppm) | U | 867 ± 116 | 766 ± 101 | 713 ± 88 | 667 ± 81 | 836 ± 48 | 890 ± 155 |
| R | 751 ± 218 | 681 ± 145 | 739 ± 118 | 677 ± 115 | 710 ± 174 | 1,006 ± 361 | |
| TC (CFU/100mL) | U | 6,952 ± 7,345 | 6,445 ± 5,318 | 5,958 ± 3,582 | 8,594 ± 7,248 | 5,185 ± 7,203 | 4,584 ± 5,229 |
| R | 7,377 ± 6,721 | 6,677 ± 6,126 | 5,023 ± 3,842 | 4,572 ± 4,451 | 4,638 ± 5,219 | 7,830 ± 8,287 | |
| FC (CFU/100mL) | U | 197 ± 221 | 492 ± 710 | 209 ± 159 | 419 ± 675 | 715 ± 753 | 805 ± 892 |
| R | 342 ± 531 | 408 ± 705 | 152 ± 157 | 287 ± 584 | 462 ± 667 | 949 ± 938 | |
#Weekly average temperature and cumulative rainfall are presented.