| Location | Date | TDS (mg/l) | Reference |
| Pasighat | Jul-13 | 62.5 | This study |
| Jan-14 | 102.5 | This study | |
| Dibrugarh | Apr-82 | 107 | [5] |
| Oct-99 | 128 | [6] | |
| Jul-13 | 97 | This study | |
| Jan-14 | 119 | This study | |
| Guwahati | Jul-79 | 101 | [4] |
| Jul-00 | 112 | [7] | |
| Apr-82 | 91 | [5] | |
| Apr-00 | 111 | [7] | |
| Dec-82 | 144 | [3] | |
| Dec-00 | 164 | [7] | |
| Oct-99 | 102 | [6] | |
| Jul-14 | 102 | This study | |
| 12-01-2014 | 194.5 | This study | |
| Goalpara | Apr-82 | 92 | [5] |
| Dec-82 | 147 | [5] | |
| Dhubri | Jul-00 | 106 | [7] |
| Aug-13 | 64 | This study | |
| Jan-14 | 98.5 | This study |