| Value | Category |
|---|---|
| 1 | Less than 25 litres (one container) |
| 2 | 25–100 l (1-4 containers) |
| 3 | 101–200 l (4 - 8 containers/ ½ to 1 drum) |
| 4 | 201–400 l (8 – 16 containers / 1 – 2 drums) |
| 5 | 401–600l (16 – 24 containers / 2 – 3 drums) |
| 6 | More than 600 litres or 3 drums |
| 7 | Specific amount of water (in kl) per month |