You have obviously never been to Bethel.  You would know why that is not possible within a five minute taxi drive from the airport.  Western Alaska can't support the waste and water infrastructure like everywhere else because the land won't allow it.  The land would destroy waste and water infrastructure quicker than the roads.  I lived in the Bush not far from Bethel and I can honestly say that the best system is already in place.  Until you see it and live it you just don't know.  Bethel is not Fairbanks.