# 40 C.F.R. § 61.204 (2026): Distribution and use of phosphogypsum for outdoor agricultural purposes

> Federal · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_204

## Section

- **Citation:** 40 C.F.R. § 61.204 (2026)
- **Heading:** Distribution and use of phosphogypsum for outdoor agricultural purposes
- **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 R / § 61.204: § 61.204   Distribution and use of phosphogypsum for outdoor agricultural purposes.

## Text

Phosphogypsum may be lawfully removed from a stack and distributed in commerce for use in outdoor agricultural research and development and agricultural field use if each of the following requirements is satisfied: (a) The owner or operator of the stack from which the phosphogypsum is removed shall determine annually the average radium-226 concentration at the location in the stack from which the phosphogypsum will be removed, as provided by § 61.207. (b) The average radium-226 concentration at the location in the stack from which the phosphogypsum will be removed, as determined pursuant to § 61.207, shall not exceed 10 pCi/g (4500 pCi/lb). (c) All phosphogypsum distributed in commerce for use pursuant to this section by the owner or operator of a phosphogypsum stack shall be accompanied by a certification document which conforms to the requirements of § 61.208(a). (d) Each distributor, retailer, or reseller who distributes phosphogypsum for use pursuant to this section shall prepare certification documents which conform to the requirements of § 61.208(b). (e) Use of phosphogypsum for indoor research and development in a laboratory must comply with § 61.205. [57 FR 23317, June 3, 1992, as amended at 64 FR 5579, Feb. 3, 1999; 65 FR 62158, Oct. 17, 2000]

## Nearby sections

- [40 C.F.R. § 61.200 (2026) § 61.200   Designation of facilities.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_200.md)
- [40 C.F.R. § 61.201 (2026) § 61.201   Definitions.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_201.md)
- [40 C.F.R. § 61.202 (2026) § 61.202   Standard.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_202.md)
- [40 C.F.R. § 61.203 (2026) § 61.203   Radon monitoring and compliance procedures.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_203.md)
- [40 C.F.R. § 61.204 (2026) § 61.204   Distribution and use of phosphogypsum for outdoor agricultural purposes.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_204.md)
- [40 C.F.R. § 61.205 (2026) § 61.205   Distribution and use of phosphogypsum for indoor research and development.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_205.md)
- [40 C.F.R. § 61.206 (2026) § 61.206   Distribution and use of phosphogypsum for other purposes.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_206.md)
- [40 C.F.R. § 61.207 (2026) § 61.207   Radium-226 sampling and measurement procedures.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_207.md)
- [40 C.F.R. § 61.208 (2026) § 61.208   Certification requirements.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_208.md)
- [40 C.F.R. § 61.209 (2026) § 61.209   Required records.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_209.md)
- [40 C.F.R. § 61.210 (2026) § 61.210   Exemption from the reporting and testing requirements of 40 CFR 61.10.](https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_210.md)

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/CFR_T40_P61_S61_204. Check the current official text before relying on it. Not legal advice.