549.5 mg/L = 549.5 ppm
| mg/L | ppm |
|---|---|
| 534.5 mg/L | 534.5 |
| 539.5 mg/L | 539.5 |
| 544.5 mg/L | 544.5 |
| 549.5 | 549.5 |
| 554.5 mg/L | 554.5 |
| 559.5 mg/L | 559.5 |
| 564.5 mg/L | 564.5 |
549.5 mg/L = 549.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm