Water -- it's the right issue in terms of biggest issue in alleviating global poverty.

My concern is you are very focused on the technology -- and not on the community. I believe community owernship is crucial to having any solution be widely adapted.

You may want to look at the Global Rainwater Harvesting Collective or Barefoot College websites. The approach is very community-based -- the community is involved in the selection of water engineers (to create rooftop rainwater harvesting systems) or solar engineers (to solar electrify the community).

And what is the source of water? where does it come from? who collects it? Is it the lack of filtering or lack of a proximate water source that is the biggest factor to address?

Who will be your partners on the ground in Ghana? who will provide the community outreach? How do you develop these relationships?

The people part matters -- in any business or organization.

To reach on-the-ground NGO's you may want to develop your relationship through US organizations working in water -- Water for People, Blue Planet Run Foundation, Acumen Fund, etc. Talk to those supporting water projects in Africa/Ghana and talk to them. See what they think, see who they can put you in touch with.