この Link あなたの言語には存在しません, で見る: English (en),
またはGoogle翻訳を使用する:  

http://www.cawst.org/

With the right knowledge and skills anyone, anywhere can take ownership of their own water, sanitation and hygiene. CAWST empowers people to take action in their homes and neighbourhoods, builds resiliency, and ensures appropriate solutions for the local water context.