Safe drinking water is scarce in southwest coastal Bangladesh. Harvested rainwater and rain-fed pond water are the main sources of drinking water for people living in this area. Both government and non-government organizations are promoting aquifer storage and recovery (ASR) schemes to provide safe drinking water for this population. This study assessed the bacteriological quality of both source water and abstracted water from five ASR sites. Water sampling and laboratory analysis for indicator bacteria and physico-chemical parameters were conducted once every 2 months, over a period of 1 year. Samples were taken from source pond, abstraction well and household storage container (point of use) for each of the ASR sites. Although the water from abstraction wells showed a 97% and 82% lowering of E. coli and Enterococci counts, respectively, from that of the source ponds, they did not satisfy WHO drinking water standard. Moreover, the microbial quality of the water deteriorated at the point of use. This indicates the requirement of both in-house treatment and improved hygiene practice for consuming ASR water.
- aquifer storage and recovery (ASR)
- drinking water
- health risk
- indicator bacteria
- First received 17 November 2015.
- Accepted in revised form 20 April 2016.
- © IWA Publishing 2016