U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 13, 2022

§ 439.4 - General limitation or standard for pH.

The pH must remain within the range 6.0 to 9.0 in any discharge subject to BPT, BCT or NSPS limitations or standards in this part.

[68 FR 12271, Mar. 13, 2003]