In my state the ratio for unlicensed care is 1:4.
I have come across two programs that advertise themselves as preschools today. One had a ratio of 1:15 and another had a ratio of 1:10.
DHS website says this:
A complaint is a suspected violation of Arizona state rules and/or statutes governing the operations of licensed child care centers or certified group homes. The Department only has jurisdiction over those matters that are governed by either rules or statutes.
Not even sure they can/would investigate a provider who was over ratio.