Colorado 
Statewide
1989
State Legislature in Colorado passed a law in 1989 that stops local governments from passing a ban on plastic products, most likely to streamline rules across the state. In order for City Council to move forward with this idea, the state would need to repeal this law.
Many cities in Colorado banned plastic bags since the state law was in effect but there haven't been any lawsuits
Steamboat
October 2019
Prohibits all establishments in Steamboat from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick Has a minimum life of over 75 uses and can carry over 18 pounds.
Paper bag fee in Steamboat is $0.20.
Aspen
May 2015
Prohibits all establishments in Aspen from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick Has a minimum life of over 75 uses and can carry over 18 pounds.
Paper bag fee in Aspen is $0.20.
Avon
October 2017
Prohibits all establishments in Avon from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick and can carry over 18 pounds.
Paper bag fee in Avon is $0.10.
Basalt
May 2012
Prohibits all establishments in Basalt from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows recycled paper and reusable shopping bags. 
Requires paper bags to be 100% recyclable, minimum 40% PCW, and no growth fiber.
Reusable bag is defined as a bag that is intended for multiple reuses. A reusable bag can be washed or cleaned without destroying the integrity of the bag. A reusable bag can be made out of a number of materials, including but not limited to cloth or fiber, heavy grade plastic, treated grain bag, wire or natural basket.
Paper & Plastic bag fee in Basalt is $0.20.
Boulder 
November 2012
Prohibits all establishments in Boulder from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows recycled paper and reusable shopping bags. 
Requires paper bags to be 100% recyclable, minimum 40% PCW, and no growth fiber.
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick Has a minimum life of over 75 uses and can carry over 18 pounds.
Paper & Plastic bag fee in Boulder is $0.10.
Breckenridge 
October 2013
Prohibits all establishments in Breckenridge from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a plastic bag that is at least 2.25 mil thick or a bag made of canvas, woven polypropylene, or similar types of durable materials. (Ord. 6, Series 2013)
Plastic bag fee in Breckenridge is $0.10.
Crested Butte 
August 2016
Prohibits all establishments in Crested Butte from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows recycled paper and reusable shopping bags. 
Requires paper bags to be 100% recyclable, minimum 40% PCW, and no growth fiber.
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick has a minimum life of over 75 uses and can carry over 18 pounds.
Denver
 
January 2019 
 
Denver had discussions at a council meeting about banning plastic bags. There is no proposal at this time.
Durango
August 2016
Prohibits all establishments in Durango from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows recycled paper and reusable shopping bags. 
Requires paper bags to be 100% recyclable, minimum 40% PCW, and no growth fiber.
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick has a minimum life of over 75 uses and can carry over 18 pounds.
Plastic disposable bag fee in Durango is $0.10.
Fort Collins 
October 2014
The Fort Collins City Council repealed the disposable bag ordinance which would have imposed a 5-cent fee for each disposable paper or plastic bag distributed by retailers in the city beginning on April 1, 2015.
Roaring Fork Valley
May 2012
Prohibits all establishments in Roaring Fork Valley from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a bag that is specifically intended for multiple reuse and is made of cloth, fiber or other machine washable fabrics that is at least 2.25 mil. thick has a minimum life of over 75 uses and can carry over 18 pounds.
Plastic bag fee in Roaring Fork Valley is $0.20.
Telluride
March 2011
Plastic bags banned.
Requires paper bags to be 100% recyclable, minimum 40% PCW, and no growth fiber.
Reusable bag is defined as any bag that is specifically designed and manufactured for multiple reuses and is either made of cloth, fiber or other machine washable fabric and is suitable for reuse.
Paper bag fee in Telluride is $0.10.
Town of Carbondale
May 2012
Prohibits all establishments in Carbondale from providing single-use plastic disposable shopping bags for the purpose of carrying away goods from the point of sale. Requires plastic bags to have a minimum thickness of 2.25 mil. Allows paper and reusable shopping bags. 
Reusable bag is defined as a bag that: A. Is designed and manufactured to withstand repeated uses over a period of time; B. Is made from a material that can be cleaned and disinfected regularly; C. Is at least two and one-fourth (2.25) mils thick if made from plastic;
Plastic bag fee in Carbondale is $0.10.
Relevant Links
Colorado’s ban on banning plastics has cities’ plans to outlaw single-use bags and straws in limbo - March 7, 2019
BOULDER DISPOSABLE BAG FEE 2012
City of Aspen Single Use Bag Study - January 12, 2018
HOW A GROUP OF KIDS BAGGED THE DISPOSABLE BAG IN BOULDER, COLORADO - March 31, 2016
Ordinance No. 5, Series 2016 - Crested Butte - August 15, 2016
Durango, CO Passes Unique Disposable Bag Policy - August 26, 2013
Forget plastic bans: Mountain towns try volunteerism, bootcamps as solutions to single-use - March 22, 2019

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