A seven-year-old girl was found alone at home after her mother was arrested for impaired driving in Newmarket.

York Regional Police said a woman was arrested following a collision at Yonge Street and Kingston Road, shortly before 6 p.m. on Tuesday.

Police were called to the scene of the crash, and said they noticed "various signs" that one of the drivers may be impaired by alcohol.

The 28-year-old driver was arrested and taken to police headquarters for a breath test, which police said she failed.

During the course of the investigation, police learned that the driver had a young daughter who was likely at home, unattended.

Officers drove to the family house at 9:30 p.m., where they located the seven-year-old by herself. Her father was called to the home to pick her up.

In a statement Wednesday, police said the 28-year-old has been charged with impaired driving, and driving with a blood-alcohol level over 80 milligrams per 100 millilitres of blood. She has also been charged with obstructing police and leaving a child unattended.

She will not be publicly identified to protect the child's identity.