Subpart G – Ammonia Manufacturing

This page provides resources for subpart G reporters, including implementation information as well as supporting documents for relevant rulemakings.

Summary

Subpart G source category consists of process units in which NH3 is manufactured either from a fossil-based feedstock produced via steam reforming of a hydrocarbon (HC) or through the gasification of solid and liquid raw material.

Reporter Resources

Subpart G Regulatory History

40 CFR Part 98.70
Federal Register Date Citation Action Description
12/09/2016 81 FR 89188 Final Rule Revises 29 subparts to streamline implementation, improve data quality, provide flexibility, and clarify the rule. Establishes confidentiality determinations for new or substantially revised data elements. Final action in response to a Petition for Reconsideration.
Final Preamble and Rule (December 2016) (pdf) (87 pp, 801 KB)
Response to Comments (December 2016)
Fact Sheet: 2015 Revisions and Confidentiality Determinations (pdf) (209.54 KB, Nov 2016)
Memo: Table of Final 2015 Revisions to the Greenhouse Gas Reporting Rule
Proposed Preamble and Rule (January 2016) (pdf) (91 pp, 890 KB)
10/24/2014 79 FR 63750 Final Rule Amends reporting and recordkeeping requirements and establishes an alternative electronic verification approach for 23 subparts to address concerns regarding public disclosure of business sensitive information while maintaining EPA’s ability to verify emissions and ensure compliance.
Final Preamble and Rule (October 2014) (pdf) (51 pp, 633 KB)
Response to Comments (December 2014)
Fact Sheet: Revisions to Reporting and Recordkeeping Requirements and Final Confidentiality Determinations under the Greenhouse Gas Reporting Program (pdf) (40.52 KB, Sep 2014)
Memorandum: Final Data Elements Deferred to March 31, 2015, List of ‘Inputs to Equations’ Data Elements Not To Be Reported (pdf) (560.53 KB, Sep 2014)
Proposed Preamble and Rule (September 2013) (pdf) (31 pp, 550 KB)
More Information about CBI for GHG Reporting
11/29/2013 78 FR 71904 Final Rule Updates global warming potentials (GWPs) to reflect IPCC AR4 values, and amends 27 subparts to improve and clarify reporting requirements. Establishes confidentiality determinations for new and revised data elements.
Final Preamble and Rule (November 2013) (pdf) (79 pp, 935 KB)
Correction Notice (January 2014) (pdf) (2 pp, 248 KB)
Response to Comments (November 2013)
Fact Sheet: 2013 Revisions and Confidentiality Determinations (pdf) (37.58 KB, Nov 2013)
Memorandum: Table of Final 2013 Revisions to the Greenhouse Gas Reporting Rule (pdf) (1.02 MB, Sept 2013)
Proposed Preamble and Rule (April 2013) (pdf) (77 pp, 909 KB)
05/26/2011 76 FR 30782 Final Rule Finalizes confidentiality determinations for 34 subparts for data elements that are not inputs to emissions equations. Finalizes amendments to 40 CFR 2 governing CBI obtained under 40 CFR 98.
Final Preamble and Rule (May 2011) (pdf) (37 pp, 330 KB)
Correction Notice (October 2011) (pdf) (6 pp, 167 KB)
Response to Comments (May 2011)
Fact Sheet: Final Confidentiality Determinations for Data Collected Under the Greenhouse Gas Reporting Program and Amendments to Special Rules Governing Certain Information Obtained Under the Clean Air Act (pdf) (43.28 KB, May 2011)
Final Data Category Assignments and Confidentiality Determinations for Part 98 Reporting Elements (pdf) (1.76 MB)
Proposed Preamble and Rule (07/27/2010) (pdf) (4 pp, 164 KB)
Proposed Preamble and Rule (07/07/2010) (pdf)(40 pp, 366 KB)
CBI Powerpoint Presentation (pdf) (95.58 KB)
12/17/2010 75 FR 79092 Final Rule Corrects technical and editorial errors, and clarifies rule provisions for subparts A, C, D, F, G, P, V, X, Y, AA, NN, OO and PP.
Final Preamble and Rule (December 2010) (pdf) (81 pp, 667 KB)
Response to Comments (December 2010)
Fact Sheet: Revisions of Certain Provisions of the Mandatory Reporting of Greenhouse Gases Rule (pdf) (97.8 KB, Nov 2010)
Proposed Preamble and Rule (August 2010) (pdf) (72 pp, 478 KB)
More Information on the Final Rule: Revisions (December 17, 2010)
10/30/2009 74 FR 56260 Final Rule Finalizes the first 30 subparts of 40 CFR Part 98, comprising subparts A, C, D, E, F, G, H, K, N, O, P, Q, R, S, U, V, X, Y, Z, AA, BB, CC, EE, GG, HH, JJ, LL, MM, NN, OO, and PP.
Final Preamble and Rule (October 2009) (pdf) (260 pp, 1.4 MB)
Response to Public Comments-Subpart G (pdf) (88.94 KB, 09/2009)
Regulatory Impact Analysis for the Mandatory Reporting of Greenhouse Gas Emissions Final Rule (pdf) (1.32 MB)
Subpart G Technical Support Document- Ammonia Manufacturing (pdf) (125.14 KB, 1/22/2009)
Proposed Mandatory Reporting of Greenhouse Gases Rule (pdf) (3.03 MB)
Proposed Mandatory Reporting of Greenhouse Gases Preamble (pdf) (3.71 MB)

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Last updated on May 8, 2025