ANSI/NSF 40(i13r2)-2005
Residential Wastewater Treatment Systems

Standard No.

ANSI/NSF 40(i13r2)-2005

Release Date

2005

Published By

American National Standards Institute （ANSI)

Scope

Section 9, Performance Testing and Evaluation, currently requires a pH range of 6.0 to 9.0 and a maximum color of 15 units. The proposal is for the color requirement to only have to be reported.