For those of you who are interested in what various faith-based groups are doing and can do for global safe drinking water and sanitation during Lent (and beyond), here is a resource that will help with prayer, study, and ACTION:
WASH for Lent
More about the site here.
Among other things, the site includes a partial list of faith-based groups working in the sector here.
If you have questions/suggestions, please join their blog, post your updates, and contact the authors of the site.