Fire Regulations in St. Charles County, MO (2026)
4 rules for unincorporated St. Charles County, Missouri.
Verified from official government sources
Fireworks
St. Charles County confines fireworks sales to a permitted, two-week window each summer and limits discharge to a handful of hours around July 4th and New Year's. Certain aerial fireworks with sticks or fins can't be sold at all, and violators face confiscation and a fine of up to $500 per incident.
St. Charles County Fireworks Sale and Use Rules
Significant RestrictionsSt. Charles County Code §§ 210.100, 210.105(A)-(B), 210.110(A)
The sale of fireworks in St. Charles County shall be authorized only as provided in and as restricted by this Article and only under permits issued pursuant to the Unified Development Ordinance of St. Charles County, Section 405.515 of the ordinances of St. Charles County, Missouri. ... Days Of Operation. No sales of fireworks shall be permitted except from June twenty-fifth (25th) through July...
Outdoor Burning
St. Charles County bans burn barrels and ground burning of solid waste outright, but allows permitted residential yard-waste burning under state air rules.
Open Burning Rules in St. Charles County
Significant RestrictionsSt. Charles County Code § 240.510(C)
Except as otherwise provided in this Subsection, no person shall engage in or permit the burning of any solid waste in any open area or container including drums and barrels. Open burning of solid waste in residential "burn barrels" or on the ground surface at any property located in the unincorporated areas of St. Charles County is expressly prohibited. However, open burning of yard waste on t...
Smoke Detectors
In St. Charles County, pulling a permit for an alteration, repair or addition to a one- or two-family home brings the whole dwelling up to new-construction smoke alarm placement, with all required alarms interconnected.
Smoke Alarms Required, St. Charles County
Some RestrictionsSt. Charles County Code § 500.150 (Residential Code § R314.2.2, R314.4)
R314.2.2 Alterations, repairs and additions. Where alterations, repairs or additions requiring a permit occur, the individual dwelling unit shall be equipped with smoke alarms located as required for new dwellings. ... R314.4 Interconnection. Where more than one (1) smoke alarm is required to be installed within an individual dwelling unit ... the alarm devices shall be interconnected in such a...
Propane Storage
St. Charles County's Fire Code caps liquefied petroleum gas storage under Section 6104.2: no single installation in the unincorporated county may hold more than 2,000 gallons of water capacity. The Fire Code Official, housed in the Division of Building and Code Enforcement, administers the limit through the adopted 2021 Fire Code as locally amended.
St. Charles County LP-Gas Storage Limit
Some RestrictionsSt. Charles County Code § 500.400 (Fire Code § 6104.2)
6104.2 Maximum capacity within established limits. As defined by the applicable ordinance of the fire district having competent jurisdiction restricting the storage of liquefied petroleum gas for the protection of heavily populated or congested areas, the aggregate capacity of any one (1) installation shall not exceed a water capacity of two thousand (2,000) gallons (7,570 L).
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