Can one rinse mouth or brush teeth with unfiltered water?

 

In places where a filter is necessary for drinking water (such as NYC – see here), one should also not rinse one’s mouth or brush one’s teeth with unfiltered water.

 

P.S. Regarding washing dishes or fruit in NYC water, it is not an issue. The copepods slide off the surface and do not stick and the same presumably would be true about rinsing your mouth. So long as all the water is spit out they should not get stuck in your mouth.

Still, this should not be done. Chazal do not permit putting something non-kosher in your mouth, even if you intend to spit it out, because they were concerned one might forget and swallow it.

The same would be here too.

 

 

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