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Download Effects Screening Levels (ESLs) Used in the Review of Air Permitting Data

Download previous effects screening levels (ESL) lists and current ESLs used in the review of air permitting data, and sign up to receive ESL-related announcements.

Questions regarding ESLs

Technical questions regarding ESLs should be addressed to Stanley Aniagu at

About the TCEQ Toxicity Factor Database

The Toxicity Factor Database is now a part of Texas Air Monitoring Information System (TAMIS) database. This database is a one-stop-shop for information about all toxicity factors developed by the TCEQ. If you previously used Excel spreadsheets to access the toxicity factors, you will now access them via the TAMIS database. The TAMIS database includes not only Effects Screening Levels (ESLs), but also Air Monitoring Comparison Values (AMCVs) and their supporting documentation. The TCEQ created the database in order to reduce errors, improve database structure, provide more information and detail to our customers, and allow more dynamic and efficient data entry.

Learn more about the Toxicity Factor Database and query the Toxicity Factor Database to search for AMCVs.

Special Notations for the Toxicity Factor Database ESLs

This application/pdfinteroffice memorandum provides important information (notations and exceptions) to users on use of ESLs in air permitting. Exceptions provided in the document include how to evaluate a compound designated with PM, as well as exceptions to the 1-hr averaging period. This memorandum was previously provided with the ESL Published Lists under the Cover Memo tab. With the new Toxicity Factor Database, this memorandum will now be housed here for reference.