CFR > Title 40 > Chapter I > Subchapter N > Part 439 > Subpart E CFR > Title 40 > Chapter I > Subchapter N > Part 439 > Subpart E – Research Current as of: 2024 | Check for updates | Other versions § 439.50 Applicability § 439.51 Special definitions § 439.52 Effluent limitations attainable by the application of the best practicable control technology currently available (BPT)
