Download Effects Screening Levels (ESLs) Used in the Review of Air Permitting Data
- What to do if you cannot locate a chemical in the database
- Questions regarding ESLs
- About the TCEQ Toxicity Factor Database
- Query the Toxicity Factor Database
- Download previous ESL Lists
- Sign up to receive toxicology announcements
What to do if you cannot locate a chemical in the database
If you cannot find a listing for a particular constituent, this does not mean a health effects review is not required. A default short-term ESL of 2 µg/m3 can be used, or you may contact the Toxicology Division to determine if a screening level has been established for a constituent that is not in this list. If no screening level exists for the constituent, then all customers must complete the TCEQ Effects Screening Level Derivation Request Form and submit it to the Toxicology Division staff.
In the interest of time and resources, the Toxicology Division requests that you please conduct a thorough search of the TCEQ Toxicity Factor Database with CAS numbers and synonyms of the constituent of interest prior to contacting the Toxicology Division. If a request has been received with constituents that are listed on the Current ESL List it will be returned.
The Toxicology Division processes ESL requests as quickly as possible, but ESL requests for long lists of chemicals may take up to a month to complete. Please contact us as early as possible in the permitting process to make requests.
Questions regarding ESLs
Technical questions regarding ESLs should be addressed to Ross Jones, 512/239-1804, or Jong-Song Lee, 512/239-1790.
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.
Download previous ESL Lists
In Excel format (Help with Downloading Files)