Title: expected environmental concentration Long Title: IUPAC Gold Book - expected environmental concentration DOI: 10.1351/goldbook.15693 Status: current Definition Calculated concentrations of a substance, typically a pesticide, in various environmental compartments based on calculations using maximum-exposure scenarios. Note EEC models assume a maximum number of applications per growing season at the maximum rate of application according to the application methods stated on the product label. Source - PAC, 2007, 79, 1153. 'Glossary of terms used in toxicology, 2nd edition (IUPAC Recommendations 2007)' on page 1220 (https://doi.org/10.1351/pac200779071153) Other Outputs - html: https://goldbook.iupac.org/terms/view/15693/html - json: https://goldbook.iupac.org/terms/view/15693/json - xml: https://goldbook.iupac.org/terms/view/15693/xml Citation: Citation: 'expected environmental concentration' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.15693 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-05-10T15:04:01+00:00