Air pollution badly affects the human rights to get a clean and healthy environment. This study aims atfinding out the legal certainty for the accuracy of measuring the quality standard level of air pollution. Thisstudy used a normative legal approach as the research method and the data were collected using a literature review. The results indicate that the level of standard criteria for air pollution is regulated in Government Regulation of the Republic of Indonesia Number 41 of 1999 concerning Air Pollution Control. The accuracy of standard criteria measurement can be guaranteed through the application of Law Number 2 of 1981 concerning Legal Metrology. Furthermore, the obligation of calibration and re-calibration against measuring, dosing, weighing devices and their outfits further guarantees the legal certainty for the society. In conclusion, it was found that by using a precise and accurate measurement method and tool, widespread impacts of environmental damage caused by air pollution can be anticipated. Therefore, the government should always follow technological developments, especially in the field of air pollution measurement.