Water Sanitation Health

PHAST step-by-step guide

A participatory approach for the control of diarrhoeal diseases


Sawyer R, Simpson-Hebert M, Wood S.

Publication details

Number of pages: 134
Publication date: 1998
Languages: English, French, Spanish, Japanese
WHO reference number: WHO/EOS/98.3


The PHAST approach helps people to feel more confident about themselves and their ability to take action and make improvements in their communities. Feelings of empowerment and personal growth are as important as the physical changes, such as cleaning up the environment or building latrines.

The guide has seven steps. The first five help take the community group through the process of developing a plan to prevent diarrhoeal diseases by improving water supply, hygiene behaviours and sanitation. The sixth and seventh steps involve monitoring and evaluation.