40 CFR § 420.08 - Non-process wastewater and storm water.

---
identifier: "/us/cfr/t40/s420.08"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 420.08 - Non-process wastewater and storm water."
title_number: 40
title_name: "Protection of Environment"
section_number: "420.08"
section_name: "Non-process wastewater and storm water."
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---


# 420.08 Non-process wastewater and storm water.

Permit and pretreatment control authorities may provide for increased loadings for non-process wastewaters defined at § 420.02 and for storm water from the immediate process area in NPDES permits and pretreatment control mechanisms using best professional judgment, but only to the extent such non-process wastewaters result in an increased flow.

[67 FR 64261, Oct. 17, 2002]