Do low-flow toilets reduce spray?

“Whew,” you may be thinking. “Good thing I have a low-flow toilet.” Because surely less water equals less spray, right?

Nope. Scientists have already asked that question—and answered it. Low-flow or no, the aerosol effect is still firmly in effect. Hundreds to thousands of little droplets are still spewed into the air.

“So, even though you may be saving energy [with a low-flow model], best to expend a little arm energy and cover the toilet with the lid before you flush,” Tetro says.

And in case you were wondering, not even bidets are off the hook.

“There isn’t contamination per se, as you might see in a freshly deposited toilet,” Tetro says. But the inner compartments and spray of a bidet can have what’s known as a biofilm, a community of bacteria. And that can be sent out in the spray.

As you might expect, “this can end up sending bacteria all over the place,” Tetro adds, “including your gluteal cleft, which most people might simply call the ‘bum crack.’”

Bottom line (we won’t bother excusing the pun): No matter if you’re using a regular tank toilet, a low flush, or a bidet, make sure you keep the lid down and/or the nozzle cleaner than clean.

When you’re not down with ‘lid down’

If “lid down” isn’t your normal routine or you fear it’ll take a while before muscle memory kicks in, here are some other actions you can take to spare yourself from germs spewing everywhere.

• Move your toothbrush. And we mean far, far away. “Your toothbrush should be at least 3 feet away, or you’ll be brushing your teeth with whatever was in the toilet,” Gerba says.
• Clean your bowl. A “drop-in” cleaner that constantly cleans your toilet bowl can cut back on the amount of germs that spew toward you during a flush. The downside? “They can damage the rubber flaps and other mechanisms inside the tank that are necessary to flush your toilet when you pull the handle,” James says. A better bet is to periodically apply an in-bowl solution. Then, use a porcelain-safe household cleaner to disinfect the tank, seat, and handle.
• Be extra cautious when you flush in public. “Valve-type” toilets like you often find in public restrooms are the worst offenders when it comes to spray. “I always flush and run,” Gerba admits. And to play it safe, use your foot rather than your hand when you press down the lever.
• Wash your hands. You hear it all the time, but it bears repeating. Because otherwise, you’re part of the germ-spreading problem.
• Clean around the toilet. The nasty little germs sent into the air after a toilet flush don’t levitate for infinity. They eventually find their way to the floor, where you walk all over them. “There are about 2 million bacteria per square inch on the average public restroom floor,” James says. “You have more control over the bathroom floor in your own house, so clean it often.”