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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.

Hot TopicThe public comment period has begun for the Decane, All Isomers proposed DSD
Hot TopicThe Toxicology Division is requesting toxicity information for n-hexane


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.

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

The TD has integrated a Toxicity Factor Database into the TCEQ’s existing Texas Air Monitoring Information System (TAMIS) database. This database is a one-stop-shop for all toxicity factors developed by the TD.

The database includes not only ESLs, but also AMCVs and their supporting documentation. This change was made to reduce errors, adopt a proper database structure, provide more information/detail to our customers, and be more dynamic and efficient with data entry.

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


Download the Latest ESL List

In Excel format (Help with Downloading Files)

Updated InformationCurrent ESL List Microsoft Excel (Updated 9/30/15)

Download Previous ESL Lists

In Excel format Microsoft Excel (Help with Downloading Files)

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