Groundwater quality of different locations of Bangladesh.

Resumo

On the basis ofgroundwater chemistry, an evaluation of groundwater for domestic and irrigation purposes was carried out for different regions of Bangladesh. Using the chemical compositions and different quality parameters, irrigation quality was assessed using six different techniques: USDA method, FAO guidelines, Water-Types approach, Combined approach proposed by Al-Bassam et al., Ali, and GOB guidelines. Drinking quality was judged by WHO provisional guidelines and GOB guidelines. The results indicated that concentrations of major cations and anions of most groundwater samples were within allowable limit. Except one location (i.e. Barisal), the water for irrigation purpose are suitable to marginally suitable considering salinity and sodicity. For drinking purpose, all except two locations (i.e. Sunamgonj and Barisal, where iron is a concern) are found suitable. At these locations, other aquifer layer with low Fe can be searched for safer Fe level. Alternatively, Fe removal system can be assembled for collecting drinkingwater.