# 40 C.F.R. § 61.126 (2026): Monitoring of operations

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_126

## Section

- **Citation:** 40 C.F.R. § 61.126 (2026)
- **Heading:** Monitoring of operations
- **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 / § 61.126: § 61.126   Monitoring of operations.

## Text

(a) The owner or operator of any source subject to this subpart using a wet-scrubbing emission control device shall install, calibrate, maintain, and operate a monitoring device for the continuous measurement and recording of the pressure drop of the gas stream across each scrubber. The monitoring device must be certified by the manufacturer to be accurate within ±250 pascal (±1 inch of water). The owner or operator of any source subject to this subpart using a wet-scrubbing emission control device shall also install, calibrate, maintain, and operate a monitoring device for the continuous measurement and recording of the scrubber fluid flow rate. These continuous measurement recordings shall be maintained at the source and made available for inspection by the Administrator, or his authorized representative, for a minimum of 5 years. (b) The owner or operator of any source subject to this subpart using an electrostatic precipitator control device shall install, calibrate, maintain, and operate a monitoring device for the continuous measurement and recording of the primary and secondary current and the voltage in each electric field. These continuous measurement recordings shall be maintained at the source and made available for inspection by the Administrator, or his authorized representative, for a minimum of 5 years. [56 FR 65943, Dec. 19, 1991]

## 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_126. Check the current official text before relying on it. Not legal advice.