I grew up in Grosse Pointe Farms for 17 years and they don't let leaky basements cross Mack or Alter. If they ever drop a nuke on Detroit I am going to back to the Pointes because they won't let it in. Brownell Jr. High on Chalfonte was a Nike missile base in 1955. Recommend it to anyone. We put in central air and that solved the problem.
Central air takes moisture out of the air.
In the winter, we heat the basement though it is not finished. Also, keep the windows closed at night. We open the basemtnt windows only from time to time. It is much improved.