Worst that can happen is 30 days of jail for first dui offense and of course it depends on several factors such as accidents, bac reading etc... but truth be told I've never seen a Judge send anyone to jail for first dui offense however, they have the discretion so even if it's 99% that they won't who knows the future? It's possible that somewhere in Jersey there's a judge that will send you to jail for it.
Yes it is possible for a first-time offender to go to jail however generally you need some exceptional circumstances such as a high reading or accident. The best way to assure that you will avoid jail is by hiring the best lawyer you can afford.
