StacksVerified U.S. regulatory reference

40 CFR §420.46

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources.
  1. (a)Basic oxygen furnace steelmaking—semi-wet; and electric arc furnace steelmaking—semi-wet. No discharge of process wastewater pollutants to navigable waters.
  2. (b)Basic oxygen furnace steelmaking—wet-suppressed combustion.
  3. (c)Basic oxygen furnace steelmaking—wet—open combustion; electric arc furnace steelmaking—wet.