No-Flush™ urinals improve restroom hygiene: Urine itself is normally sterile, 0% bacterial, unless one has a kidney infection. Fecal matter is 95% bacterial, and may include pathogens.
There are surface areas in water flush urinals that are constantly damp and where bacterial growths appear. These growth colonies are additionally seeded by fecal material carried in air-borne droplets and aerosols that were produced by the turbulence in flushing the restroom's toilets. When the restroom urinals are themselves flushed, they in turn create aerosols containing the new-growth bacteria, and inject still more microbes into the rest room atmosphere. Microbes, bacteria and viruses thrive in moisture. Dry surfaces will inhibit their growth, meaning that waterless urinals are actually more sanitary than flushed fixtures.
Installing No-Flush™ urinals with predominantly dry surfaces and no additional flushing actions lessen rest room visitor exposures to airborne bacteria.