---
kind: "unit"
title: "40"
title_heading: "Protection of Environment"
key: "chI/subchN/part423"
level: "part"
label: "Part 423"
heading: "Steam Electric Power Generating Point Source Category"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/40/chI-subchN-part423"
sections_count: 10
---

# Part 423 — Steam Electric Power Generating Point Source Category

Title 40 C.F.R. — Protection of Environment › Chapter I — Environmental Protection Agency › Subchapter N — Effluent Guidelines and Standards

## Sections

- [§423.10. Applicability and severability.](/cfr/40/423.10.md)
- [§423.11. Specialized definitions.](/cfr/40/423.11.md)
- [§423.12. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).](/cfr/40/423.12.md)
- [§423.13. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).](/cfr/40/423.13.md)
- [§423.14. Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT). [Reserved]](/cfr/40/423.14.md)
- [§423.15. New source performance standards (NSPS).](/cfr/40/423.15.md)
- [§423.16. Pretreatment standards for existing sources (PSES).](/cfr/40/423.16.md)
- [§423.17. Pretreatment standards for new sources (PSNS).](/cfr/40/423.17.md)
- [§423.18. Permit conditions.](/cfr/40/423.18.md)
- [§423.19. Reporting and recordkeeping requirements.](/cfr/40/423.19.md)