# 40 CFR § 1037.101: Overview of emission standards

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.101

## Section

- **Citation:** 40 CFR § 1037.101
- **Heading:** Overview of emission standards
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 40—Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER U—AIR POLLUTION CONTROLS > PART 1037—CONTROL OF EMISSIONS FROM NEW HEAVY-DUTY MOTOR VEHICLES > Subpart B—Emission Standards and Related Requirements

## Text

(a) You must show that vehicles meet the following emission standards:
(1) Exhaust emissions of criteria pollutants. Criteria pollutant standards for NOX, HC, PM, and CO apply as described in § 1037.102. These pollutants are sometimes described collectively as “criteria pollutants” because they are either criteria pollutants under the Clean Air Act or precursors to the criteria pollutants ozone and PM.
(2) [Reserved]
(3) Fuel evaporative and refueling emissions. Requirements related to fuel evaporative and refueling emissions are described in § 1037.103.
(b) The regulated heavy-duty vehicles are addressed in different groups as follows:
(1) For criteria pollutants, vehicles are regulated based on gross vehicle weight rating (GVWR), whether they are considered “spark-ignition” or “compression-ignition,” and whether they are first sold as complete or incomplete vehicles.
(2) [Reserved]
(3) For evaporative and refueling emissions, vehicles are regulated based on the type of fuel they use. Vehicles fueled with volatile liquid fuels or gaseous fuels are subject to evaporative and refueling emission standards.
[88 FR 4635, Jan. 24, 2023, as amended at 89 FR 29765, Apr. 22, 2024; 91 FR 7786, Feb. 18, 2026]

## Nearby sections

- [40 CFR § 1037.1 § 1037.1 Applicability.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.1.md)
- [40 CFR § 1037.2 § 1037.2 Who is responsible for compliance?](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.2.md)
- [40 CFR § 1037.5 § 1037.5 Excluded vehicles.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.5.md)
- [40 CFR § 1037.10 § 1037.10 How is this part organized?](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.10.md)
- [40 CFR § 1037.15 § 1037.15 Do any other regulation parts apply to me?](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.15.md)
- [40 CFR § 1037.30 § 1037.30 Submission of information.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.30.md)
- [40 CFR § 1037.101 § 1037.101 Overview of emission standards.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.101.md)
- [40 CFR § 1037.102 § 1037.102 Criteria pollutant exhaust emission standards—NOX, HC, PM, and CO.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.102.md)
- [40 CFR § 1037.103 § 1037.103 Evaporative and refueling emission standards.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.103.md)
- [40 CFR § 1037.115 § 1037.115 Other requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.115.md)
- [40 CFR § 1037.120 § 1037.120 Emission-related warranty requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.120.md)
- [40 CFR § 1037.125 § 1037.125 Maintenance instructions and allowable maintenance.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.125.md)
- [40 CFR § 1037.130 § 1037.130 Assembly instructions for secondary vehicle manufacturers.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.130.md)
- [40 CFR § 1037.135 § 1037.135 Labeling.](https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.135.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-40-1037.101. Check the current official text before relying on it. Not legal advice.