Interactive tool
Water Calculator
Check what grade your water is, how clean your Water Purifier can get it, and how much cheap water you can blend in before you drop a grade.
What grade is it?
Enter the purity from your test strip or AquaScan.
Grade
Basewater
Lower Levels standard
Purifier limit
Quality modules set how clean the Water Purifier can get.
Max purity
99.00%
Best result: High-Quality.
Blend two batches
Stretch clean water with cheaper water, down to a target grade.
Blended purity
99.00%
1.00 L of weak water hits 99%.
| Grade | From |
|---|---|
| Pure Water | 99.9% |
| High-Quality | 99% |
| Basewater | 98% |
| Ghostwater | 96% |
| Rustwater | 90% |
| Gutterflow | Under 90% |
| Bonus | Max purity |
|---|---|
| +0 | 99% |
| +15 | 99.15% |
| +25 | 99.35% |
| +50 | 99.65% |
| +75 | 99.8% |
| +100 | 99.9% |
| +200 | 100% |
Blending assumes a simple average by volume. One player guide reports losing about 0.25% per dilution step, so leave a margin and test the result before you sell it. Bonuses between the listed steps use the step below.
Data from allthings.how water guide, Water Trading Made Easy by Owlie. Compiled from published guides, not tested in-game by us.