CFR > Title 40 > Chapter I > Subchapter N > Part 450 > Subpart B CFR > Title 40 > Chapter I > Subchapter N > Part 450 > Subpart B – Construction and Development Effluent Guidelines Current as of: 2024 | Check for updates | Other versions § 450.21 Effluent limitations reflecting the best practicable technology currently available (BPT) § 450.22 Effluent limitations reflecting the best available technology economically achievable (BAT) § 450.23 Effluent limitations reflecting the best conventional pollutant control technology (BCT) § 450.24 New source performance standards reflecting the best available demonstrated control technology (NSPS)
