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Waterless urinals and hygieneFeatured science projectScience project video

Conclusion

The hypothesis that waterless urinals will have less bacteria compared to water based urinals, is proven to be true.

Waterless urinals help to reduce water wastage and also help to lower the cost of treating waste water. In addition, they are more hygienic and are odor free. Moreover, since there is no need for flush valves and external water sources, the maintenance cost is also lower.
 

Also consider

This science fair project can be modified by collecting bacteria samples from other areas around the urinals such as from the floor, walls or wash basins near the urinals.

Also, to produce more accurate results, you might want to consider collecting swab samples from at least 5 different spots/locations within each urinal.
 

References

Characteristics of a waterless urinal - http://www.ehow.com/list_5965246_characteristics-waterless-urinal.html

Waterless urinals: features, benefits and application - http://www.atypon-link.com/CPUB/doi/abs/10.3992/jgb.1.1.55?cookieSet=1&journalCode=jgb
 

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Complexity level:
7
Project cost ($):
20
Time required:
1 day to prepare, 5 days for the science project experiment
Material availability:
Easily found
Safety concerns:

The agar in the Petri dishes should be properly disposed of and the Petri dishes decontaminated after the experiment. This can be done by washing the Petri dishes with bleach.