Maybe I don't understand the question.
Huntrrsville Police are dispatched by CMPD. It's all part of UASI.
but here are the UASI frequencies
Charlotte UASI Site: Mecklenburg Simulcast Details
www.radioreference.com
Here are the Talk groups,
Charlotte UASI TG Category: Huntersville Details
www.radioreference.com
I couldn't find fire.