I agree that minimum cost ...
Published by David Marioni, Professional Civil / Environmental Engineer / Manager in Oil and Gas and Multi-Sectoral Consultancy
I agree that minimum cost segregates the end users. Make a small bottled water plant for mothers of young infants and find a way to fund this minimum cost approach. Minimum cost technology for this minimum flow can be designed if you define the flowrate and water quality parameters fully / completely. Purpose driven funding might be available for the identified target group.