Take this with a grain of salt, as we tried to verify the validity of this law. There were no records found on the Denver website. This could very easily be one of those old laws that is very rarely, if ever, enforced, and probably so old it is forgotten about by now. Though, a dirty vacuum cleaner could pose some health issues.
If you search for strange laws in the U.S., you will come across a number of odd laws and ordinances that are still on the books. In the meantime, however, stick with lending a cup of sugar or a broom!
Written by Sam Stankie