EPA Greenlights Colorado's Updated Car Inspection Rules
Published Date: 11/18/2025
Rule
Summary
Colorado’s vehicle inspection and maintenance program just got a fresh update approved by the EPA, aiming to keep the air cleaner and healthier. Starting December 18, 2025, drivers and auto shops in Colorado will follow new rules that help reduce pollution from cars. This change helps Colorado meet air quality goals without adding extra costs or delays for folks on the road.
Analyzed Economic Effects
5 provisions identified: 5 benefits, 0 costs, 0 mixed.
Colorado drivers: updated I/M rules
If you drive a vehicle in Colorado, revisions to the State’s vehicle inspection and maintenance (I/M) program (Regulation No. 11, Parts A–D, specific sections listed) are federally approved and become enforceable on December 18, 2025. The EPA approved the SIP revision submitted May 16, 2022, so drivers in Colorado will follow the updated I/M requirements as part of the State Implementation Plan starting on that date.
North Front Range: enhanced program expansion
The revision finalizes expansion of the Enhanced Emissions Program to the North Front Range area (Regulation No. 11, Part A, section V), and that change is federally approved and enforceable as of December 18, 2025. This specifically references the North Front Range expansion as part of the approved SIP amendments.
Inspection stations and repair shops affected
If you operate or work at an emissions inspection station, readjustment station, inspection-only facility, motor vehicle dealer test facility, or emissions-related repair facility in Colorado, Regulation No. 11 Part D (sections I–III) revisions are federally approved and enforceable on December 18, 2025. The EPA’s approval makes those state licensing, qualification, and registration provisions part of the federally enforceable SIP as of that date.
Clean Screen / remote sensing added
The SIP revision incorporates Clean Screen/Remote Emissions Sensing provisions (Regulation No. 11, Part A IV and Part C XII) and adds a provision for approval of Clean Screen Test Analyzer Systems (Part B XI). These clean-screen and remote-sensing procedures are federally enforceable starting December 18, 2025.
No added federal costs for small businesses
The EPA states that this action approves state law as meeting federal requirements and "does not impose additional requirements beyond those imposed by state law." The EPA also certified the action as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act.
Your PRIA Score
Personalized for You
How does this regulation affect your finances?
Sign up for a PRIA Policy Scan to see your personalized alignment score for this federal register document and every other regulation we track. We analyze your financial profile against policy provisions to show you exactly what matters to your wallet.
Key Dates
Department and Agencies
Related Federal Register Documents
2026-06275 — Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes
The EPA just set new rules for renewable fuels in 2026 and 2027, including how much biofuel must be used. They’re also easing the 2025 cellulosic biofuel goals because production fell short and dropping renewable electricity as a qualifying fuel. These changes affect fuel producers and sellers, kick in mostly by mid-2026, and aim to keep America’s fuel cleaner and greener without breaking the bank.
2026-05167 — National Emission Standards for Hazardous Air Pollutants: Ethylene Oxide Emissions Standards for Sterilization Facilities Residual Risk and Technology Review Reconsideration
The EPA is proposing changes to rules for sterilization facilities that use ethylene oxide, a chemical that can be harmful if not controlled. They want to remove some strict risk-based limits, fix technical mistakes, and update how facilities prove they’re following the rules. If you run or work with these facilities, get ready for new deadlines and clearer standards by mid-2026, which could affect how you manage emissions and compliance costs.
2026-04646 — Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Large Municipal Waste Combustors Voluntary Remand Response and Five-Year Review
The EPA is updating pollution rules for big trash-burning plants to cut harmful emissions like lead, mercury, and dioxins. These changes affect both new and existing facilities, tighten limits, remove some loopholes, and improve reporting, all starting May 11, 2026. This update will help clean the air by reducing over 3,200 tons of pollution each year, making communities healthier and safer.
2025-21788 — Oil and Natural Gas Sector Climate Review: Extension of Deadlines in Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources
The EPA is giving oil and natural gas companies more time to meet new pollution control rules and report their emissions. Deadlines for fixing leaks, monitoring equipment, and submitting state plans are pushed back to help everyone get ready without rushing. These changes keep the climate goals on track while easing the financial and timing pressure on the industry.
2025-20402 — Updated Definition of “Waters of the United States”
The EPA and Army Corps are updating the rules that decide which waters are protected under the Clean Water Act, following a 2023 Supreme Court decision. This change helps everyone know exactly which waters are covered, making it easier to protect lakes, rivers, and wetlands while respecting state and tribal rights. People and businesses affected should share their thoughts by January 5, 2026, as this update could impact water projects and environmental protections.
2025-19882 — Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) Data Reporting and Recordkeeping Under the Toxic Substances Control Act (TSCA); Revision to Regulation
The EPA is updating rules for companies that make or import PFAS chemicals, asking them to report certain info about these substances from 2011-2022. The changes add some smart exceptions to ease reporting on things companies probably don’t know, saving time and hassle. Comments on the proposal are open until late December 2025, so affected businesses should get ready to weigh in!
Previous / Next Documents
Previous: 2025-20203 — Air Plan Approval; Montana: Infrastructure Requirements for the 2015 Ozone National Ambient Air Quality Standards
The EPA is giving Montana a thumbs-up for updating its air quality plan to meet the 2015 ozone pollution rules. This means Montana’s air programs are ready to keep the air cleaner and healthier. The new rule kicks in on December 18, 2025, with no extra costs for residents or businesses.
Next: 2025-20206 — Fisheries of the Northeastern United States; Atlantic Herring Fishery; Adjustment to the 2025 Specifications
Good news for Atlantic herring fishers! NMFS is boosting the 2025 catch limits by 1,000 metric tons because fewer herring were caught in New Brunswick than expected. This change kicks in November 17 and runs through the end of the year, giving fishers more room to catch and sell herring without extra costs or delays.
Take It Personal
Get Your Personalized Policy View
Start a Free Government Policy Watch to see how policy affects your household, then upgrade to PRIA Full Coverage for year-round monitoring.
Already have an account? Sign in