An official website of the United States government.

SW-846 Test Method 9045D: Soil and Waste pH

The following document provides information on the electrometric procedure for measuring pH in soils and waste samples, including solids, sludges, or non-aqueous liquids.

This method is an SW-846 Method-Defined Parameter (MDP), meaning that it may not be modified when used for Resource Conservation and Recovery Act (RCRA) testing. For more information, see the Methods Innovation Rule page.

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