Can I build a biosand filter to use in North America or Europe?

The biosand filter, in the versions supported by CAWST, is a technology addressing the great need for potable water in the developing world. The filter does not provide microbiological treatment up to the water quality standards of developed nations, nor does it remove most chemical contaminants.

The biosand filter is most appropriate for use in areas where people do not have access to piped, potable water to their home; pathogens in the water are making, or could make, people sick; there is limited or no access to electricity; and resources and access are so limited that people are unable to purchase or maintain more sophisticated home treatment technologies.

There are other technologies which are more appropriate for use in North American and European applications.