It would seem that this is not an isolated incident. A quick Google produces quite a lot of warnings about tap water. https://www.epa.gov/dwstandardsregulation

It would seem that this is not an isolated incident. A quick Google produces quite a lot of warnings about tap water. https://www.epa.gov/dwstandardsregulations/danger-using-tap-water-contact-lenses https://www.epa.gov/dwstandardsregulations/danger-using-tap-... http://www.moorfields.nhs.uk/content/healthy-habits-healthy-eyes http://www.moorfields.nhs.uk/content/healthy-habits-healthy-... https://www.cdc.gov/contactlenses/water-and-contact-lenses.html https://www.cdc.gov/contactlenses/water-and-contact-lenses.h...