40 CFR § 420.07 - Effluent limitations guidelines and standards for pH.

---
identifier: "/us/cfr/t40/s420.07"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 420.07 - Effluent limitations guidelines and standards for pH."
title_number: 40
title_name: "Protection of Environment"
section_number: "420.07"
section_name: "Effluent limitations guidelines and standards for pH."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "N"
subchapter_name: "EFFLUENT GUIDELINES AND STANDARDS"
part_number: "420"
part_name: "IRON AND STEEL MANUFACTURING POINT SOURCE CATEGORY"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "33 U.S.C. 1311, 1314, 1316, 1317, 1318, 1342, and 1361."
regulatory_source: "47 FR 23284, May 27, 1982, unless otherwise noted."
cfr_part: "420"
---


# 420.07 Effluent limitations guidelines and standards for pH.

(a) The pH level in process wastewaters subject to a subpart within this part shall be within the range of 6.0 to 9.0.

(b) The pH level shall be monitored at the point of discharge to the receiving water or at the point at which the wastewater leaves the wastewater treatment facility operated to treat effluent subject to that subpart.

[67 FR 64261, Oct. 17, 2002]