# 40 CFR § 125.1: Purpose and scope

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/ecfr-40-125.1

## Section

- **Citation:** 40 CFR § 125.1
- **Heading:** Purpose and scope
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** September 22, 2026
- **Source:** Publisher's official text
- **Location:** Title 40—Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER D—WATER PROGRAMS > PART 125—CRITERIA AND STANDARDS FOR THE NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM > Subpart A—Criteria and Standards for Imposing Technology-Based Treatment Requirements Under Sections 301(b) and 402 of the Act

## Text

This subpart establishes criteria and standards for the imposition of technology-based treatment requirements in permits under section 301(b) of the Act, including the application of EPA promulgated effluent limitations and case-by-case determinations of effluent limitations under section 402(a)(1) of the Act.

## Nearby sections

- [40 CFR § 125.1 § 125.1 Purpose and scope.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.1.md)
- [40 CFR § 125.2 § 125.2 Definitions.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.2.md)
- [40 CFR § 125.3 § 125.3 Technology-based treatment requirements in permits.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.3.md)
- [40 CFR § 125.10 § 125.10 Purpose and scope.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.10.md)
- [40 CFR § 125.11 § 125.11 Criteria.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.11.md)
- [40 CFR § 125.30 § 125.30 Purpose and scope.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.30.md)
- [40 CFR § 125.31 § 125.31 Criteria.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.31.md)
- [40 CFR § 125.32 § 125.32 Method of application.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.32.md)
- [40 CFR § 125.56 § 125.56 Scope and purpose.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.56.md)
- [40 CFR § 125.57 § 125.57 Law governing issuance of a section 301(h) modified permit.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.57.md)
- [40 CFR § 125.58 § 125.58 Definitions.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.58.md)
- [40 CFR § 125.59 § 125.59 General.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.59.md)
- [40 CFR § 125.60 § 125.60 Primary or equivalent treatment requirements.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.60.md)
- [40 CFR § 125.61 § 125.61 Existence of and compliance with applicable water quality standards.](https://www.frixlaw.com/law-library/statutes/ecfr-40-125.61.md)

---

Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/ecfr-40-125.1. Check the current official text before relying on it. Not legal advice.