Other Solid Waste Incinerators (OSWI): New Source Performance Standards (NSPS) and Emission Guidelines (EG) for Existing Sources
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Rule Summary
EPA promulgated new source performance standards (NSPS) and emission guidelines (EG) for new and existing ‘‘other’’ solid waste incineration units (OSWI). The final rules for OSWI units fulfill the requirements of sections 111 and 129 of the Clean Air Act (CAA), which require EPA to promulgate NSPS and emission guidelines for solid waste incineration units. The final rules, which address only the incineration of nonhazardous solid wastes, will protect public health by reducing exposure to air pollution.
Rule History
11/04/2024 - Final Rule Technical Corrections - OSWI Air Curtain Incinerators and Title V Permit Provisions (pdf)
07/25/2024 - Proposed Amendments - OSWI Revisions to Definition
04/17/2024 - Final Rule - OSWI Air Curtain Incinerators and Title V Permit Provisions
05/24/2023 - Proposed Standards of Performance for New Stationary Sources and Emission Guidelines for Existing Sources: Other Solid Waste Incineration Units Review; Withdrawal of Proposed Provision Removing Pyrolysis/Combustion Units (88 FR 36524)
08/31/2020 - Proposed Amendments (85 FR 54178)
01/22/2007 – Notice of Final Action on Reconsideration (72 FR 2620) (pdf) (194 KB)
12/18/2006 – Proposed Rule (71 FR 75816) (pdf) (269 KB)
11/24/2006 – Direct Final Rule (71 FR 67802) (pdf) (164 KB) & Direct Final Rule (71 FR 67832) (pdf) (141 KB)
06/28/2006 – Notice of Reconsideration of Final Rule (71 FR 36726) (pdf) (157 KB)
12/16/2005 – Final Rule (70 FR 74870) (pdf) (376 KB)
12/09/2004 – Proposed Rule (69 FR 71472) (pdf) (377 KB)
11/02/1993 - Notice Listing of Categories of Sources of Other Solid Waste Incineration Units under Section 129 of the Clean Air Act and a Schedule for Promulgation of Regulations (58 FR 58498)
Additional Resources
March 17, 2026 - Proposed Consolidation of Air Curtain Incinerator Provisions
On March 17, 2026, EPA proposed to consolidate air curtain incinerator (ACI) requirements across four Clean Air Act section 129 rules for ACIs solely used for the incineration of wood waste, yard waste, and clean lumber. Read the proposed rulemaking.
Final Rule 2025
Fact Sheet: Other Solid Waste Incinerators - Final Rule (pdf) (June 2025)
Economic Impact Analysis: Other Solid Waste Incinerators - Final Rule (pdf) (June 2025)
Supplemental Proposed Rule 2024
Fact Sheet: OSWI – Supplemental Proposal to Add a Definition for Rudimentary Combustion Device (pdf) (July 2024)
- Redline/strikeout (RLSO) of subpart EEEE (Proposal) (pdf) (July 2024)
- Redline/strikeout (RLSO) of subpart FFFF (Proposal) (pdf) (July 2024)
Overview Presentation: OSWI - Supplemental Proposal to Add a Definition for Rudimentary Combustion Device (pdf) (August 2024)
Final Rule 2024 - Air Curtain Incinerators and Title V Permit Provisions
Fact Sheet: Other Solid Waste Incinerators – Air Curtain Incinerators and Title V Permit Provisions Final Rule (pdf) (April 2024)
Withdrawal of Proposed Amendments 2023
Proposed Amendments 2020
Fact Sheet: Proposed Amendments to Other Solid Waste Incineration Unit Standards (pdf) (August 2020)
Final Rule 2005
View the supporting documents in the docket folder to find additional related documents to this rule.
Regional Contacts
EPA Regional OSWI Contacts (as of June 2026)
| EPA Region | NESHAP Coordinator |
|---|---|
| EPA Region 1 5 Post Office Square Suite 100 Boston, MA 02109-3912 | Jessica Kilpatrick 617-918-1652 kilpatrick.jessica@epa.gov |
| EPA Region 2 Air Branch 290 Broadway, 21st Floor New York, NY 10007-1866 | Fausto Taveras Phone: 212-637-3378 taveras.fausto@epa.gov |
| EPA Region 3 1650 Arch Street Philadelphia, PA 19103 | Krystal Stankunas Phone: 215-814-5271 stankunas.krystal@epa.gov |
| EPA Region 4 61 Forsyth Street, S.W. Atlanta, GA 30303-8960 | Mark Bloeth Phone: 404-562-9013 bloeth.mark@epa.gov |
| EPA Region 5 77 West Jackson Blvd. Chicago, IL 60604 | Margaret Sieffert Phone: 312-353-1151 sieffert.margaret@epa.gov |
| EPA Region 6 1445 Ross Avenue Dallas, TX 75202-2733 | Karolina Ruan-Lei Phone: 214-665-7346 ruan-lei.karolina@epa.gov |
| EPA Region 7 11201 Renner Blvd., Lenexa, KS 66219 | Cassandra Mance Phone: 913-551-7041 mance.cassandra@epa.gov |
| EPA Region 8 1595 Wynkoop Street Denver, CO 80202-1129 | Jacob Fine-Thomas Phone: 303-312-6949 finethomas.jacob@epa.gov |
| EPA Region 9 75 Hawthorne Street San Francisco, CA 94105 | Shaheerah Kelly Phone: 415-947-4156 kelly.shaheerah@epa.gov |
| EPA Region 10 1200 Sixth Ave., Suite 155 Seattle, WA 98101 | Geoffrey Glass Phone: 206-553-1847 glass.geoffrey@epa.gov |
Related Rules
Compliance
Applicability Determination Index (ADI). The ADI is maintained by EPA's Office of Enforcement and Compliance Assurance (OECA) and provides a data base of memoranda dealing with applicability issues. The database is searchable by Subpart.