Access 400+ methods vetted by experts
Over 50,000 water professionals worldwide trust Standard Methods for water and wastewater analysis techniques.
Join Us!
Participate in the ongoing development and revision of Standard Methods. Fill out an application to join the Standard Methods Committee.
Recruiting Volunteers!
Seeking JTG members for 4500-NH3 Nitrogen. Labs needed for interlaboratory study for 4500-N Nitrogen and 3125 Metals by ICPMS
Seeking representatives of manufacturers of TKN equipment for 4500-Norg revision
What's New
4500-PAA is now 4500-PAA PFA. Review the updated method for peracetic acid, which now details the measurement of performic acid residuals in addition to PAA residuals.
Announcement from SM Joint Editorial Board. The titles of methods are changing! To better indicate approval year versus editorial revision date, method titles will incorporate a year designation. Please review the memo from the JEB for details. Questions or comments? Contact the JEB or the SM program manager.