My town has a floor that's about 100 gallons per day that I'm always under. My bill, with no sewer, is more than $20/month. $100/month for water seems high in that, anecdotally, electrical and oil bills are a much bigger deal for most people than water. OTOH, $100/month doesn't seem out of the realm of reasonableness either.
I confess to being a bit surprised but, based on the comments, it certainly seems as if $100/month is within the normal range for water bills, even for light use.
