439.5 mg/L = 439.5 ppm
| mg/L | ppm |
|---|---|
| 424.5 mg/L | 424.5 |
| 429.5 mg/L | 429.5 |
| 434.5 mg/L | 434.5 |
| 439.5 | 439.5 |
| 444.5 mg/L | 444.5 |
| 449.5 mg/L | 449.5 |
| 454.5 mg/L | 454.5 |
439.5 mg/L = 439.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm