https://wccftech.com/iphone-lineup-2019-same-ip68-water-dust-resistance/

Apple finally introduced the industry-consistent IP68 water and dust-resistance for premium devices when it announced the iPhone XS, and iPhone XS Max, with the iPhone XR getting the IP67 rating. Even though the manufacturer reiterates that should you accidentally damage your devices because water entered and wrecked havoc with the innards, this damage will not be covered under warranty.

Still, it is nice to know that you will have a layer of protection over your expensive devices should you accidentally drop them in water. However, with the upcoming series, which will land in 2019, Apple does not appear to want to make any changes to this level of protection.