The primary purpose of a water supply and sanitation project is to ach
ieve an effective and sustainable improvement of the community environ
ment. This paper presents the experiences gained in the evaluation of
a water supply and sanitation project in a settlement in Dhaka where i
mproved water supply, sanitary latrines and hygiene education were pro
vided by a reputed international non-governmental organization. Water
and latrine use practices by adults improved but latrines were maintai
ned so poorly that concentrated pollution created a problem within the
community. The people from the community were not provided with appro
priate knowledge or a system of maintenance. Even though water supply
and sanitation were given priority status, since they were not planned
with a view to being sustainable, they failed to interrupt the enviro
nmental contamination process.