Rep. Joseph Brennan was arrested on Wednesday after his wife, Norma Jane Brennan, told officers he assaulted her outside their home in Fountain Hill.
The Democrat was arrested a few blocks from his home, where officers say they administered a breathalyzer test and he failed it.
Forty-eight year old Brennan, who was charged with assault, harassment and drunk driving, was released from jail after posting $7,500 bail.
This is not the first time that Brennan was arrested on DUI charges. In June 2011 he was arrested in Bethlehem and charged with drunken driving.