Maximum Permissible Limit of Sulphates in Domestic Water Supplies

The maximum safe permissible limit of sulphates in domestic water supplies is 200 mg/l.

Reasoning

Sulphates are naturally occurring compounds that can be found in groundwater, surface water, and tap water. While small amounts of sulphates are not harmful to human health, excessive exposure to sulphates can lead to health problems. Therefore, it is essential to ensure that the sulphate levels in domestic water supplies are within the safe permissible limit.

The safe permissible limit of sulphates in domestic water supplies is determined by regulatory bodies such as the World Health Organization (WHO) and the Environmental Protection Agency (EPA). These organizations have set the limit at 200 mg/l because sulphates above this level can cause the following health problems:

- Gastrointestinal problems: High levels of sulphates can cause diarrhoea, abdominal cramps, and other gastrointestinal problems.
- Dehydration: Sulphates can cause dehydration by increasing the osmotic pressure in the intestines, leading to water loss.
- Bitter taste: Sulphates can make the water taste bitter, making it unpleasant to drink.

Conclusion

In conclusion, the safe permissible limit of sulphates in domestic water supplies is 200 mg/l. By ensuring that the sulphate levels in water are within this limit, we can protect ourselves from the harmful effects of excessive sulphate exposure.