TS ISO 4226

TS ISO 4226 is a standard that specifies the units to be used when reporting the results of air quality measurements. In air quality work, the choice of unit is not just a formatting detail: it affects how measurement results are understood, compared and exchanged between laboratories, monitoring networks and technical reports. This standard provides a common unit framework for expressing air quality results consistently.

From a general technical perspective, air quality measurement deals with quantities such as pollutant concentrations, particle levels and related physical properties in the atmosphere. If the same quantity is reported in different units without a clear convention, comparisons can become confusing or misleading. A standard on units helps keep data readable and interoperable across environmental monitoring, analytical reporting and technical communication.

How measurement units support consistent reporting

The focus of this standard is the presentation of air quality results, not the design of instruments, sampling procedures or limit values. Its role is to define which units are to be used in reporting, so that results remain coherent and easier to compare across datasets. The note referencing ISO 1000 points to general guidance on the International System of Units, placing this subject within the wider SI framework used for scientific and technical measurement.

• Specifies the units used when reporting air quality measurement results.
• Supports comparability of air quality data across different reports and sources.
• Aligns unit use with the broader SI-based measurement framework.
• Helps ensure consistent expression of pollutant concentrations and related quantities.