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

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

New TopicA new public comment period has begun for the Cobalt Proposed DSD
New TopicToxicity data request for manganese and inorganic compounds and ethyl tert butyl ether
Hot TopicThe Toxicity Factor Database is now available!

What to Do if a Chemical Is Not on the List

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 Microsoft Excel 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 Current ESL List 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 the ESL List

Technical questions regarding the ESL List should be addressed to Ross Jones, 512/239-1804, or Jong-Song Lee, 512/239-1790.

TCEQ Toxicity Factor Database

New Information 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 transition to accessing 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 changed 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.

Download the Latest ESL List

In Excel format (Help with Downloading Files)

Updated InformationCurrent ESL List Microsoft Excel (Updated November, 2016)

Download Previous ESL Lists

In Excel format Microsoft Excel (Help with Downloading Files)

September 2015 | March 2014 | February 2013 | March 2012 | July 2011 | December 2010 |

June 2010 | October 2009 | February 2009 | September 2008 | April 2008 |

2007 | 2003 | 2000 | 1997 | 1996 | 1995 | 1994