I'm looking for.this too OP. I used to go to a stylist who worked out of her home in Maryland but she moved away
She used Ecocolors, but I could not find any salons near me that currently use it;
https://www.ecocolors.net/FindASalon/FindASalon.cfm
Know there is one in downtown Frederick that uses lower toxicity dyes, and one in Ellicott City and Baltimore. I would pay $$$$ to find one in metro Maryland, but so far I have struck out.
http://www.samwongsalon.com/
https://www.bellawest.net/
I just order the less toxic hair color and do it myself, since moving here. Otherwise, I tend to have allergic reactions and the stylist dismiss my concerns.