A new underground sewage pipeline now connects Nofim, Yakir, Etz Ephraim, Sha’arei Tikva and soon Ma’aleh Shomron, bringing all of their effluent to a treatment facility in Eliyahu. But for political reasons, the PA has refused to connect Palestinian Arab villages to the system.
http://www.jpost.com/Sci-Tech/Article.aspx?id=256320