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Regulatory Development and Retrospective Review Tracker

Concentrated Animal Feeding Operations Regulations Revision Rule

a.k.a. CAFO Regulations Revision Rule

RIN: 2040-AF20 (What's this?)

Docket No.: Not yet available (What's this?)

Current Phase: Withdrawn (What's this?)

This Web page will be retained for 1 year for historical purposes, and then it will be removed from Reg DaRRT.

EPA originally entered into a settlement agreement with the Chesapeake Bay Foundation on May 10, 2010 to propose revisions to the National Pollutant Discharge Elimination System (NPDES) regulations for Concentrated Animal Feeding Operations (CAFOs). Under an amended agreement reached with the Chesapeake Bay Foundation on May 29, 2013, EPA will not propose revisions to these regulations.


This site provides summaries of priority rulemakings and priority retrospective reviews of existing regulations. We update most of the site at the beginning of each month, though some data is updated more frequently if it is time sensitive. The information on this site is not intended to and does not commit EPA to specific conclusions or actions. For example, after further analysis, EPA may decide the effects of a rule would be different or it may decide to terminate a rulemaking.

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