In the recent decades, Bangladesh achieved the national water supply coverage at 97% (BBS:2006) which again fall to 74% (Jakariya 1997) due to the presence of arsenic in majority of the districts. Beside this, the practical situations of access to the safe water is worse than the national coverage especially in costal rural area due to natural disaster and lack of maintenance capacity of poor households. On the other hand, national coverage of sanitation is 39% (BBS:2006) and it is nevertheless to say, the practical situation of rural poor families are more miserable than the national coverage. In fact, in absence of toilets, the alternatives remain the bush, streams, rivers, ponds, the beach or a hole in the ground. The provision of water services alone has a limited impact on health in absence of safe sanitation. Improving sanitation can reduce the cases of diarrhoea by a third, while adopting good hygiene practices can reduce these diseases by another third. The health of women and children is especially affected due to unhygienic sanitation practice. A servey of NGO Forum (2008) reveals that the main reasons for the low coverage of the cosal belt are limited financial resource, unaviable production outlet near by the locality and lack of awareness among the illiterate households.

BISAP has been implementing Water and Environmental Sanitation programme in Chittagong Districts and other parts of the Country. Improvement is found among the targeted beneficiaries to change their own situation. At present they are more conscious about hygienic education and its practice. BISAP is maintaining good touch with local administration to introduce 100% sanitation coverage in the area. Necessary Hardware and software support is being provided to the beneficiaries for strengthening programme activities for sustainable environmental health. Inadequate sanitation is a major cause of disease. Improvement of sanitation and personal hygiene has a significant  beneficial impact in the household as well as community level. Taking the MDGs pertaining to Water and sanitation BISAP has been working on the issue in the urban slum of Chittagong coastal areas as  well as villages to improve the  disease burden of the community people specially children and women by community-led approach and promotion of knowledge for sustainable environmental health.