Eventhough the prevention efforts for communicable diseases through sanitation clinic has been
implemented for a long time, it is still not optimal. As an example, the average number of patients
in a month who come for counseling in the sanitation clinic of the Community Health Center
(Puskesmas) of Minggir is only four. Meanwhile, in 2011, at the same puskesmas, the number of
cases of communicable diseases such as diarrhoea, acure respiratory infection (ARI) and dengue haemorrhagic fever (DHF) were still found at high level. Therefore, it is argued that the
existing sanitation clinic should be more developed. The study was aimed to know whether the
knowledge and the quality of house condition of the patients as well as the revenue of sanitation
clinic can be increased by developing the activity of the sanitation clinic itself, by conducting a
pre-experiment study which employed one group pre-test and post-test design. The number of
sample size was 36 people, which were consisted of 20 diarrhoea patients, 15 ARI patients and
20 DHF patient with his neighbours. The collection of pre-test and post-test data were separated
by the activity of the counseling and home visit whose purpose was to improve the environmental condition of the patients, by means of chlorine diffuser installation and fly sticker application, for diarrhoea cases; advice of avoiding smoke from kitchen and the rearrangement of
ventilation, for ARI cases; and the distribution of Abate and mosquito trap installation, for DHF
cases. Statistical examination on the data by using t-test at 95 % significancy level showed that
the counseling raised the knowledge of patients of the environmentally based diseases, and the
home visit could also improving the quality of patients’ houses, which was indicated by the reduction of the MPN E. Coli, the fly density and the ovitrap index. In addition, the increase of revenue from the sanitation clinic was influenced, as well.