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EPA's Region 6 Office

Serving: Arkansas, Louisiana, New Mexico, Oklahoma, Texas, and 66 Tribal Nations

Pretreatment Program

Publicly owned treatment works (POTWs) collect wastewater from homes, commercial buildings, and industrial facilities and transport it via a series of pipes, known as a collection system, to the treatment plant. Here, the POTW removes harmful organisms and other contaminants from the sewage so it can be discharged safely into the receiving stream. Generally, POTWs are designed to treat domestic sewage only; however, POTWs also receive wastewater from industrial (non-domestic) users. The General Pretreatment Regulations establish responsibilities of Federal, State, and local government, industry and the public to implement Pretreatment Standards to control pollutants from the industrial users which may pass through or interfere with POTW treatment processes or which may contaminate sewage sludge.

Final Pretreatment Streamlining Rule [PDF - 408 KB - 66 pp] - On September 27, 2005, EPA signed and on October 14, 2005 published in the Federal Register final changes to its General Pretreatment Regulations. The final "pretreatment streamlining" rule is designed to reduce the burden to users; protect the environment; and provide more flexibility in technical and administrative requirements affecting industrial users, municipal sewage treatment facilities, and state and EPA authorities. (Note: Unless otherwise noted, the documents accessible through this Pretreatment page have not been updated to reflect new or revised rules after the date of publication of the document.)

Copy of Pretreatment Regulations incorporating changes made by the final Pretreatment Streamlining Rule - This document shows the 40 CFR Part 403 Pretreatment Regulations with Streamlining Rule revisions highlighted. This document is being provided to help Regional and State permitting authorities, POTWs, industrial facilities, and members of the public understand how the new streamlining changes affect pretreatment program requirements. Although EPA has made every effort to ensure the accuracy of this document, this is not the official version of the regulations. The new version of the Code of Federal Regulations, incorporating these changes, will be published in July 2006.


Region 6 States Storm Water Program Enforcement
Pretreatment Publications

EPA HQs Pretreatment

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