Faribault is about 50 miles (80 kilometers) south of Minneapolis.
The 15-year-old girl told police that Manahan had sprayed her and her siblings.
The girl also said Manahan sprayed water through an open second-floor window of her family's home. Police say a rug, a piece of furniture and the walls were drenched.
According to the complaint, Manahan told police he was trying to spray a fence, not his neighbors.
Manahan remains in jail. His public defender did not immediately return a phone message seeking comment Wednesday.