I coudn't believe, when I looked at the info page about ratios in Maine, that the 2 1/2 yr - 3 1/2 yr ratio was 1:8 - and sure enough, it isn't.
It is actually 1:7 (still astounding in my opinion, but at least one better than 8.) When I called the state they told me to look for an accredited child care, since their accreditation calls for more restrictive ratios.
The other ratios they gave me are as follows:
6 Weeks - 1 Year: 1:4 (with a maximum of 12 children in one space)
1 Yr - 2 1/2: 1:5 with 2 teachers, otherwise 1:4
2 1/2 - 3: 1:7 (with a maximum of 21 children in one space)
I hope this helps