S/N | Parameter | Recommended values for aquatic life |
01 | Temperature | 24˚C - 31˚C |
02 | Dissolved oxygen (mg/L) | Not below 4 ppm/mg/L |
03 | Turbidity (cm) | Clear water (30 cm depth) |
04 | TDS (mg/L) | Less than 1000 mg/L |
05 | TSS | >100 - <220 mg/L |
06 | pH | 6.5 - 8.5 |
07 | Total hardness | 50 - 300 ppm/mgL |
08 | Alkalinity | 50 - 200 ppm |
10 | Nitrate concentration (mg/L) | Less than 250 ppm/mg/L |
12 | Ammonia | Less than 0.05 ppm/mg/L |
13 | Iron | Less than 0 - 1 ppm |
14 | Lead | Less than 0.02 ppm |
15 | Hydrogen sulphide | Less than 0.003 ppm |
16 | Copper | Less than 0.0 ppm |
17 | Zinc | Less than 0.1 ppm |