| S.No | BIS Committee No. | BIS Committee Title | ISO Committee No. | ISO Committee Title | Role |
|---|---|---|---|---|---|
| 1 | WRD-1 | Hydrometry | ISO TC 30 | Measurement of fluid flow in closed conduits | Observer |
| 2 | WRD-1 | Hydrometry | ISO TC 30 / SC 2 | Pressure differential devices | Observer |
| 3 | WRD-1 | Hydrometry | ISO TC 30 / SC 5 | Velocity and mass methods | Participating |
| 4 | WRD-1 | Hydrometry | ISO TC 30 / SC 7 | Volume methods including water meters | Observer |
| 5 | WRD-1 | Hydrometry | ISO TC 113 | Hydrometry | Observer |
| 6 | WRD-1 | Hydrometry | ISO TC 113 / SC 1 | Velocity area methods | Observer |
| 7 | WRD-1 | Hydrometry | ISO TC 113 / SC 2 | Flow measurement structures | Participating |
| 8 | WRD-1 | Hydrometry | ISO TC 113 / SC 5 | Instruments, equipment and data management | Participating |
| 9 | WRD-1 | Hydrometry | ISO TC 113 / SC 6 | Sediment transport | Participating |
| 10 | WRD-3 | Ground Water and Related Investigations | ISO TC 113 / SC 8 | Ground water | Participating |
| 11 | WRD-3 | Ground Water and Related Investigations | ISO TC 319 | Karst | Observer |
| 12 | WRD-29 | Small Hydropower Plants | ISO TC 339 | Small hydropower plants (SHP plants) | Participating |