@arstechnica “In water sampling, Acanthamoeba and other biofilm-associated amebae have been detected in over 50 percent of US tap water samples.”
Unsafe: tap water in neti pots, as eyewash, as contact cleaner, and CPAP or other respiratory devices. Instead, use ‘…boiled, sterile, or distilled water.
"If tap water is used, it should be boiled for a minimum of 1 minute, or 3 minutes in elevations >1,980 meters, and cooled before use”.’