# 40 C.F.R. § 61.125 (2026): Test methods and procedures

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_125

## Section

- **Citation:** 40 C.F.R. § 61.125 (2026)
- **Heading:** Test methods and procedures
- **Jurisdiction:** Federal
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Title 40 CFR: Protection of Environment / Chapter I / Part 61 / Subpart K / § 61.125: § 61.125   Test methods and procedures.

## Text

(a) Each owner or operator of a source required to test emissions under § 61.123, unless an equivalent or alternate method has been approved by the Administrator, shall use the following test methods: (1) Method 1 of appendix A to 40 CFR part 60 shall be used to determine sample and velocity traverses; (2) Method 2 of appendix A to 40 CFR part 60 shall be used to determine velocity and volumetric flow rate; (3) Method 3 of appendix A to 40 CFR part 60 shall be used for gas analysis; (4) Method 5 of appendix A to 40 CFR part 60 shall be used to collect particulate matter containing the polonium-210; and (5) Method 111 of appendix B to 40 CFR part 61 shall be used to determine the polonium-210 emissions. [54 FR 51699, Dec. 15, 1989, as amended at 65 FR 62156, Oct. 17, 2000]

## Nearby sections

- [40 C.F.R. § 61.120 (2026) § 61.120   Applicability.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_120.md)
- [40 C.F.R. § 61.121 (2026) § 61.121   Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_121.md)
- [40 C.F.R. § 61.122 (2026) § 61.122   Emission standard.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_122.md)
- [40 C.F.R. § 61.123 (2026) § 61.123   Emission testing.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_123.md)
- [40 C.F.R. § 61.124 (2026) § 61.124   Recordkeeping requirements.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_124.md)
- [40 C.F.R. § 61.125 (2026) § 61.125   Test methods and procedures.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_125.md)
- [40 C.F.R. § 61.126 (2026) § 61.126   Monitoring of operations.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_126.md)
- [40 C.F.R. § 61.127 (2026) § 61.127   Exemption from the reporting and testing requirements of 40 CFR 61.10.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_127.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_125. Check the current official text before relying on it. Not legal advice.