- Invasive Species Management
- Noxious Weeds
- Noxious Weed Information
- Landowner Responsibility
As a landowner in Colorado you have a responsibility to control noxious weeds if they are found on your property. The level of control depends which of Colorado’s weed lists it fall on. Visit the State Department of Agriculture’s Noxious Weed program’s site for more information.
Jeffco ISM’s authority is limited to private, county, and state-owned lands within the unincorporated areas of the county. Our office does not have legal authority within municipalities or on federal lands.
For complaints about property within city-limits, contact that city’s code enforcement department.
If the owner fails to manage their weeds, there is an official complaint process. In Jeffco, we may accept official written complaints from adjacent property owners for List A and B noxious weeds on properties 1 acre or more that are impacting natural or agricultural lands. Our office will evaluate the complaint and at our discretion, we may undertake an enforcement action. Enforcement actions must follow the process laid out in the Weed Law (CRS 35-5.5-108.5 and 109).
Whenever possible, we encourage people with concerns to first contact the owner of the property that has weeds before making a report.