| Solid content mg/ L | Water filtered through a 100-mesh sieve |
| 0-50 | Equal to filtered water |
| 50-75 | Nozzles less than 1mm should not be used |
| 75-100 | Nozzles less than 1.5mm should not be used |
| 100-200 | Nozzles less than 3mm should not be used |
| More than 200 | A clean nozzle is recommended |