I found this in a 1953 letter from Edward Hopkins (Baltimore City Water Engineer) to a Mrs. Cobb, in New Jersey:
“Fluoridation of the Baltimore water began on November 26, 1952. Fluoridation of the supply was ordered by the Mayor and confirmed by vote of the City Council. The subsequent injunction to restrain the City from applying fluoridation was dismissed, on the grounds that this action would not interfere with religious beliefs, and that it was within the jurisdiction of the Mayor and City Council to proceed.”
Upon some research I found why it was against religious beliefs. The documentation is fairly long so I placed it on my History page for anyone who would like to comment.