Fireworks are addressed in Section 10-10-10 of the Municipal Code:

Section 10-10-10
Any person who, within the corporate limits of the City, discharges any firecrackers, fireworks as defined by state law, or explosives of any description without written permission from the Chief of Police, which permission shall limit the time and fix the place of the discharge of such firecrackers, fireworks or other explosives, and which permission shall be subject to revocation by the Chief of Police at any time after the same has been granted, shall be guilty of a misdemeanor.

Please contact the Police Department at 303-761-8711 with questions.