Researchers 3D Print Biosensor to Test for Contaminated Drinking Water

It seems like every day we stumble upon another awesome use for 3D printing which could potentially be saving lives. The latest comes out of England where researchers have 3D printed a biosensor which enables people in developing nations to know when the water in their area is safe for drinking. The biosensor works with a fuel cell filled with bacteria. The way in which is works can be read about here: http://3dprint.com/11979/3d-printed-sensor-clean-water

Could this 3D printable device be what it takes to prevent illness due to contaminated water, especially in developing countries?