Looks like calcium build up to me as well. I would hit it with a mild acid and than rehone and polish. Also check for moisture, Toliet may be leaking

On Thu, Aug 17, 2017 at 7:53 PM, Kyle <Kyle@xtreme-coat.com> wrote:
I am guessing but is it calcium or hard water build up?  Try some CLR on it or the XGen blue cleaner degreaser?  

- Kyle Wuchterl 

On Aug 17, 2017, at 7:24 PM, Baird Standish <bairdstandish@gmail.com> wrote:

Looks to me like some kind of chemical reaction.
On Thu, Aug 17, 2017 at 7:14 PM <justin@jmcstoneandtilecare.com> wrote:
Hey guys, I've attached a couple of pictures one of my clients sent me (last pic is what the grout is supposed to look like). Anyone have any idea what could make the grout turn white? This is a janitorial company and the customer thinks bleach was used on the grout but the company doesn't use bleach. Let me know what you think.

Thank you,
Justin Cameron
JMC Stone and Tile Care
951-972-6997

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