StacksVerified U.S. regulatory reference

40 CFR §421.236

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 a 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary nickel and cobalt process wastewater introduced into a POTW shall not exceed the following values:
  1. (a)Raw material dust control.
  2. (b)Nickel wash water.
  3. (c)Nickel reduction decant.
  4. (d)Cobalt reduction decant.