StacksVerified U.S. regulatory reference

40 CFR §439.42

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT:
  1. (a)The limitation for BOD5 is the same as specified in § 439.12(a). No facility shall be required to attain a monthly average limitation for BOD5 that is less than the equivalent of 45 mg/L.
  2. (b)The limitation for TSS is the same as specified in § 439.12(b).
  3. (c)The limitations for COD are the same as specified in § 439.22(c) and (d).