820.5 mg/L = 820.5 ppm
| mg/L | ppm |
|---|---|
| 805.5 mg/L | 805.5 |
| 810.5 mg/L | 810.5 |
| 815.5 mg/L | 815.5 |
| 820.5 | 820.5 |
| 825.5 mg/L | 825.5 |
| 830.5 mg/L | 830.5 |
| 835.5 mg/L | 835.5 |
820.5 mg/L = 820.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm