Table 2.
Physicochemical characteristics of harvested rainwater.
| Parameter (unit) | Used methods | Harvested rainwater | Bangladesh drinking water quality standards | WHO standards |
|---|---|---|---|---|
| Chloride (mg/L) | Mohr's | 6.50 | 150–600 | 200–300 |
| Iron (mg/L) | Colorimetric | 0.11 | 0.30–1.00 | 0.3 |
| Nitrate (mg/L) | Cd reduction | 0.40 | 50 | 50 |
| pH | Membrane electrode | 6.72 | 6.5–8.5 | 6.8–7.3 |
| Turbidity (NTU) | Spectrophotometric | <1.00 | 6.00 | 5.0 |
| TDS (mg/L) | Conductivity | 12 | 500–1000 | 1000 |
| Total hardness (mg/L) | EDTA | <10 | 500 | 40 |
| Alkalinity (mg/L) | Mohr's | 50 | 50 | 40 |