I try to reduce our exposure to wifi around the home, removing devices from the bedroom and having our computers hard wired switching wifi on only when it is being used.
We can't get cell service at home so I don't use a smart phone or cell phone except when I'm traveling.
I try to counter balance it with "earthing", going bare feet as much as possible or going into moving waters when ever possible.
Interesting that a brahmana cannot stay in a place where there is no water. Thanks for sharing that - it adds to the importance of water!