An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

40 FR 33152 - Standards of Performance for New Stationary Sources: Five Categories of Sources in the Phosphate Fertilizer Industry

Federal Register notice of final rule for Standards of Performance for New Stationary Sources (NSPS). Standards are for five categories of sources in the phosphate fertilizer industry: Wetprocess phosphoric acid plants, superphosphoric acid plants, diammonium phosphate plants, triple superphosphate plants, and granular triple superphosphate storage facilities.

You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.