IIRC, in the past, if you were in your county/region, ambulance was free, if you were outside of where your address was, you were on the hook for $75. Things are a little different now. Apparently, every ambulance ride costs $240 and ohip picks up $195 if they deem your trip medically necessary. You pay $45. Small price to pay if you need it but I don't know when that changed. I don't know if attendance by fire has changed too.