Table 2
Regulatory standards provided by the various international and national (KUEPA) boards (Alsulail et al. 2015)
| Parameters (ppm) | FDA (Food and Drug Administration) | WHO | WHO AESTHETIC | KUEPA |
|---|---|---|---|---|
| Ca2+ | – | – | 200 | 200 |
| Na+ | – | 50 | 200 | 200 |
| K+ | – | 12 | 200 | 10 |
| Mg2+ | – | 50 | – | 150 |
| Cl− | 250 | – | 200 | 250 |
 | 250 | – | 250 | 250 |
| pH | – | – | 6.5–8.5 | 6.5–8.5 |
| TDS | 500 | – | 600 | 1,000 |
| Pb (μg/L) | 5 | 10 | 10 | |
| Ni (μg/L) | 100 | 70 | – | 20 |
| Cu (μg/L) | 1,000 | 2,000 | 5,000 | 2,000 |
| Al (μg/L) | 200 | 100 | 100 | 200 |
| Cd (μg/L) | 5 | – | 3 | 3 |
| Zn (μg/L) | 5,000 | 50 | 4,000 | 3,000 |
| Ba (μg/L) | 2,000 | 700 | – | 700 |
| Cr (μg/L) | 100 | 50 | 50 | |
| Fe (μg/L) | 300 | – | 300 | 300 |
| Parameters (ppm) | FDA (Food and Drug Administration) | WHO | WHO AESTHETIC | KUEPA |
|---|---|---|---|---|
| Ca2+ | – | – | 200 | 200 |
| Na+ | – | 50 | 200 | 200 |
| K+ | – | 12 | 200 | 10 |
| Mg2+ | – | 50 | – | 150 |
| Cl− | 250 | – | 200 | 250 |
| | 250 | – | 250 | 250 |
| pH | – | – | 6.5–8.5 | 6.5–8.5 |
| TDS | 500 | – | 600 | 1,000 |
| Pb (μg/L) | 5 | 10 | 10 | |
| Ni (μg/L) | 100 | 70 | – | 20 |
| Cu (μg/L) | 1,000 | 2,000 | 5,000 | 2,000 |
| Al (μg/L) | 200 | 100 | 100 | 200 |
| Cd (μg/L) | 5 | – | 3 | 3 |
| Zn (μg/L) | 5,000 | 50 | 4,000 | 3,000 |
| Ba (μg/L) | 2,000 | 700 | – | 700 |
| Cr (μg/L) | 100 | 50 | 50 | |
| Fe (μg/L) | 300 | – | 300 | 300 |