Table 3.
Comparison of physicochemical quality of water resources of villages in Bardaskan city with the standard of drinking water of Iran during the years 2016–2017 [3,4,8,20].
| Parameter | 1053IR Standard |
Percentage of villages |
|||
|---|---|---|---|---|---|
| Desirable | Limit | Desirable | Limit | More than standard | |
| pH | 6.5–8.5 | 6.5–9 | 100 | – | – |
| TDS (mg/L) | 500 | 1500 | 70 | 20 | 10 |
| CL− (mg/L) | 250 | 400 | – | 88 | 12 |
| SO42− (mg/L) | 250 | 400 | 10 | 77.5 | 12.5 |
| NO3− (mg/L) | – | 50 | – | 94 | 6 |
| NO2− (mg/L) | – | 3 | 100 | – | – |
| Ca2+ (mg/L) | 300 | 400 | 100 | – | – |
| Mg2+ (mg/L) | 30 | 150 | 16.5 | 83.5 | – |
| Na+ (mg/L) | 200 | 200 | – | 55 | 45 |
| F− (mg/L) | 0.5 | 1.5 | 65 | 35 | – |
| TH (mg/L as CaCO3) | 200 | 500 | 30.5 | 35 | 66 |
| Turbidity (NTU) | <1 | 5 | 96.6 | – | 3.4 |
| EC (μmhos/cm) | 1500 | 2000 | 13 | 74 | 13 |