Historical
NSF/ANSI 245-2012
Wastewater treatment systems - Nitrogen reduction
This Standard (NSF/ANSI 245-2012) includes the following change: Issue 6 - The purpose of this ballot was to make the language relating to failure sensing equipment in the wastewater standards consistent as well as update it regarding the testing procedure. This change appears in 5.8.
NSF International [nsf]