Abstract— Clean water is a water that can be used for
many household need. To produce a high quality water a
supervision on its production needs to be done by pdam on a
regular basis in order to qualify for the requirements such as
physic, microbiology, chemistry, radioactive. This days reporting
process that is on time and accurate has yet to be done, beside
that there is potential of mistake from this reporting due to its
conventional preparation process was still high. The purpose
from this was to implement web service using RESTfull method
server that are integrated with cellular app in smartphone with
android platform so that the data reporting process can be done
at the exact same time with serving it on the data sample in a
graphic and table form. The data gathering technique that are
being used in this research was observation technique, interview,
documentation, literature review, and questionnaire. The method
that are being used in this research was the Global extreme
programming method (GXP). This research produce a
supervision on water cleansing based on cellular app based on
web service to support the data reporting that are done real time,
so the possibility of mistake in the water processing process In
PDAM Tirta Wijaya can be known as soon as possible.