953 PSU = 948,353.1 ppm
| PSU | ppm |
|---|---|
| 938 PSU | 933,426.2 |
| 943 PSU | 938,401.8 |
| 948 PSU | 943,377.5 |
| 953 PSU | 948,353.1 |
| 958 PSU | 953,328.7 |
| 963 PSU | 958,304.3 |
| 968 PSU | 963,279.9 |
953 PSU = 948,353.1 ppm
1 g/kg ≈ 1.0049 PSU · 1 mg/L ≈ 0.001 PSU · 1 ppm ≈ 0.001 PSU (dilute aqueous approximation)