Vanderburgh County Sheriff's deputies were called to check on the welfare of the toddler around 10:30 p.m. Sunday.
Deputies say the child was found standing in the drain on the corner of Carlsbad and Everglades Dr.
The person who called 911 found the boy's father, 34-year-old Corey Trueblood, in a nearby home. Deputies charged Trueblood with child neglect.
The boy is now in the care of his mother.