Emissions and VOC laws in Colorado

We follow 2 Colorado rules on aftermarket emissions parts, gas small engines and high-VOC consumer products; all are bans.

Check a specific item for Colorado

Colorado

BannedDo not sell or ship consumer products (hairspray, aerosol spray paint, multipurpose lubricant, air freshener, etc.) into Colorado unless they meet Colorado's consumer-product VOC limits.

5 CCR 1001-25 (AQCC Regulation No. 21) Part A, I.A-I.B, II.B, Table 1 · effective Feb 14, 2023 · draft

Exact text

I.A. This part applies to any person who sells, supplies, offers for sale, distributes for sale, or
manufactures for sale consumer products in
I.A.1. The 8-hour Ozone Control Area.
...
I.A.3. (State Only) Colorado. As marked by (State Only), the requirements are not
federally enforceable.
...
II.B. No person can sell, supply, offer for sale, or distribute for sale in Colorado any consumer
product that is manufactured on or after May 1, 2020, with a VOC content in excess of
the VOC limit specified in Table 1.
...
* Single-phase aerosol 30
* Double-phase aerosol 25 20
...
Hairsprays 55 NA
Hair finishing spray 55
...
* Multi-purpose lubricant
(excluding solid or semi-solid
products)
50 25

BannedDo not sell or ship an aftermarket catalytic converter to Colorado unless it has a CARB Executive Order (13 CCR 2222(h) exemption) for the vehicle; used or salvaged converters may not be sold there at all.

5 CCR 1001-24 (AQCC Regulation No. 20) Part C, I-II · effective Jan 1, 2021 · draft

Exact text

Effective January 1, 2021, this regulation applies to all Aftermarket Catalytic Converters that are sold,
offered for sale, or advertised for sale or use in Colorado on any model year vehicle that is powered by a
spark-ignition engine and has a gross vehicle weight rating of less than 14,001 lbs.
II. Prohibition
II.A. It is unlawful for any person to install, sell, offer for sale, or advertise any Aftermarket
Catalytic Converter intended for use on any motor vehicle originally equipped with
catalytic converter(s) in Colorado unless it has been exempted pursuant to the
requirements of California Code of Regulations, Title 13, Section 2222 (h) (i.e. a
"California Aftermarket Catalytic Converter").
II.B. It is unlawful for any person to install, sell, offer for sale, or advertise any used, recycled,
or salvaged catalytic converter in Colorado pursuant to the requirements of California
Code of Regulations, Title 13, Section 2222 (h) and (i).

Federal

Applies in every state.

BannedDo not sell or ship emissions defeat devices (delete pipes, EGR/DPF/catalyst deletes, tuners or software that disable emission controls) anywhere in the US.

42 U.S.C. § 7522(a)(3)(B) (Clean Air Act § 203(a)(3)(B)) · draft

Exact text

(B) for any person to manufacture or sell, or offer to sell, or install, any part or component intended for use with, or as part of, any motor vehicle or motor vehicle engine, where a principal effect of the part or component is to bypass, defeat, or render inoperative any device or element of design installed on or in a motor vehicle or motor vehicle engine in compliance with regulations under this subchapter, and where the person knows or should know that such part or component is being offered for sale or installed for such use or put to such use; or