Historical
NSF/ANSI 40-2022
Residential Wastewater Treatment Systems
This standard contains minimum requirements for residential wastewater treatment systems having rated treatment capacities between 1,514 LPD (400 GPD) and 5,678 LPD (1,500 GPD). Management methods for the treated effluent discharged from residential wastewater treatment systems are not addressed by this standard.
Content Provider
NSF International [nsf]