254.5 mg/L = 254.5 ppm
| mg/L | ppm |
|---|---|
| 239.5 mg/L | 239.5 |
| 244.5 mg/L | 244.5 |
| 249.5 mg/L | 249.5 |
| 254.5 | 254.5 |
| 259.5 mg/L | 259.5 |
| 264.5 mg/L | 264.5 |
| 269.5 mg/L | 269.5 |
254.5 mg/L = 254.5 ppm
1 ppm = 1 mg/L (aqueous, density ≈ 1 kg/L) · 1 ppb = 0.001 mg/L · 1% = 10,000 ppm