# Emission limit value

*Last updated: 2026-06-26*

> Emission limit values come into play at type approval, periodic technical inspection, and the entry points of low-emission zones: they set the maximum permissible concentration or mass of a given pollutant – typically nitrogen oxides (NOx), particulate matter (PM), or carbon dioxide (CO₂) – that a vehicle or engine may not exceed under standardised test conditions.

Emission limit values come into play at type approval, periodic technical inspection, and the entry points of low-emission zones: they set the maximum permissible concentration or mass of a given pollutant – typically nitrogen oxides (NOx), particulate matter (PM), or carbon dioxide (CO₂) – that a vehicle or engine may not exceed under standardised test conditions. Progressively tightened Euro standards, currently Euro 6 for heavy-duty and light vehicles, introduce new thresholds at each stage and drive fleet renewal cycles across road freight. The emission limit value is distinct from an emission standard: the limit value is the specific numerical ceiling, while the standard is the broader regulatory framework encompassing measurement methods, test cycles, and transitional provisions.

**Source:** [https://en.wikipedia.org/wiki/Emission_standard](https://en.wikipedia.org/wiki/Emission_standard)

## Quick Facts

| Property | Value |
|---|---|
| Term | Emission limit value |
| Language | EN |
| Word count | 116 |
| Last updated | 2026-06-26 |
| Source | https://en.wikipedia.org/wiki/Emission_standard |

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