Great question. It all depends on where you live. For example in Riverstone Crossing its town water. However there are a few older streets such as Bignells Rd that would be still on Septic. Some of Holyrood Rd has Town water (I ran the water myself from behind the bus stop on Maudsland Rd which is why half the street is on Town Water and half the street is on septic.
I think Parklake is on septic but if you can give me a street, estate or area I will be able to point you in the right direction.