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General Open Burn Permit

Most outdoor burning in unincorporated Larimer County requires a permit signed by both the Fire Department and the Department of Health and Environment. The fire department evaluates applications for potential fire safety issues, while the health department evaluates applications for air quality issues that can impact human health. For example, open burning releases fine particulates that can aggravate chronic lung diseases and carbon monoxide that can prevent the transport of oxygen in the blood.

Open burning in Larimer County is regulated by the Colorado Department of Public Health and Environment/Air Pollution Control Division and Larimer County Department of Health and Environment under Colorado Air Quality Control Commission's Regulation One. Open burning without a permit is illegal and can result in fines of up to $10,000 per day.

Prohibited Materials

  • Routine yard and garden clean-up waste
  • Structures
  • Construction debris
  • Household garbage
  • Materials that produce excessive smoke
  • Commercial/Business waste
  • Stumps

Safety Guidelines

  • Pile debris in open areas away from standing timber and structures.
  • Piles should be no larger than 8 feet wide and 6 feet high.
  • There must be a minimum of 3 inches of snow cover around piles.
  • Winds should be less than 10 mph.
  • Always have water, a rake, and a shovel available.
  • Attend all fires until completely out.
  • All burning must be extinguished by nightfall.

A General Open Burn Permit must be obtained before burning mountain slash piles in unincorporated Larimer County. The open burn period is from October 1 thru March 31 and is dependent upon favorable conditions (4 inches of snow on ground, light wind, daylight burning only). Applications will not be processed until one week before the start of the open burn period.

Apply for Burn Permit

You can apply for a General Open Burn Permit using one of the three methods below:

Fill out the online application form.

The online application will be routed electronically and you will receive an email notice regarding the status of your application and your final General Open Burn Permit.

New application
Renew/Extend previous permit
  Print the Burn Application Form [pdf], fill it out, mail it to:

Larimer County Department of Health and Environment
1525 Blue Spruce Dr.
Fort Collins, 80524

  Visit the Department of Health and Environment at 1525 Blue Spruce Dr., Fort Collins, 80524, and fill out the application there. You may also contact us by phone at 498-6775.

Additional Information

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