{"data":{"id":"us/40-cfr-appendix-i-to-part-1039","jurisdiction":"us","citation":"40 CFR Appendix I to Part 1039","heading":"Appendix I to Part 1039—Summary of Previous Emission Standards","body":"The following standards, which EPA originally adopted under 40 CFR part 89, apply to nonroad compression-ignition engines produced before the model years specified in § 1039.1:\n(a) Tier 1 standards apply as summarized in the following table:\nTable 1 to Appendix I—Tier 1 Emission Standards\n[g/kW-hr]\nRated power (kW) Starting model year NOX HC NOX + NMHC CO PM\nkW\u003c 8 2000 10.5 8.0 1.0\n8 ≤ kW \u003c 19 2000 9.5 6.6 0.80\n19 ≤ kW \u003c 37 1999 9.5 5.5 0.80\n37 ≤ kW \u003c 75 1998 9.2\n75 ≤ kW \u003c 130 1997 9.2\n130 ≤ kW ≤ 560 1996 9.2 1.3 11.4 0.54\nkW \u003e 560 2000 9.2 1.3 11.4 0.54\n(b) Tier 2 standards apply as summarized in the following table:\nTable 2 to Appendix I—Tier 2 Emission Standards\n[g/kW-hr]\nRated power (kW) Starting model year NOX + NMHC CO PM\nkW\u003c 8 2005 7.5 8.0 0.80\n8 ≤ kW \u003c 19 2005 7.5 6.6 0.80\n19 ≤ kW \u003c 37 2004 7.5 5.5 0.60\n37 ≤ kW \u003c 75 2004 7.5 5.0 0.40\n75 ≤ kW \u003c 130 2003 6.6 5.0 0.30\n130 ≤ kW \u003c 225 2003 6.6 3.5 0.20\n225 ≤ kW \u003c 450 2001 6.4 3.5 0.20\n450 ≤ kW ≤ 560 2002 6.4 3.5 0.20\nkW \u003e 560 2006 6.4 3.5 0.20\n(c) Tier 3 standards apply as summarized in the following table:\nTable 3 to Appendix I—Tier 3 Emission Standards\n[g/kW-hr]\nRated power (kW) Starting model year NOX+NMHC CO PM\n37 ≤ kW \u003c 75 2008 4.7 5.0 0.40\n75 ≤ kW \u003c 130 2007 4.0 5.0 0.30\n130 ≤ kW ≤ 560 2006 4.0 3.5 0.20\n(d) Tier 1 through Tier 3 standards applied only for discrete-mode steady-state testing. There were no not-to-exceed standards or transient testing.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER U—AIR POLLUTION CONTROLS","PART 1039—CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"cc137f524604295eb47c2211ad64a06bf7a98ed222f1fa01f8d2f8bc20ec69f4","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-1039.825","next":"us/40-cfr-appendix-ii-to-part-1039"},"notice":"GroundRules: Original legal text. Not legal advice."}