quality standards

https://doi.org/10.1351/goldbook.14964
Fixed upper limits for exposure to certain chemicals recognized under law by one or more levels of government. Well-known examples include the air, water, and soil quality standards, as well as threshold limit values for air pollutants in the workplace.
Source:
PAC, 2009, 81, 829. (Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)) on page 933 [Terms] [Paper]