{"data":{"id":"us/40-cfr-table-1-to-subpart-kkkka-of-part-60","jurisdiction":"us","citation":"40 CFR Table 1 to Subpart KKKKa of Part 60","heading":"Table 1 to Subpart KKKKa of Part 60—Nitrogen Oxide Emission Standards for Stationary Combustion Turbines","body":"Combustion turbine type Combustion turbine base load rated heat input (HHV) Input-based NOX emission standard 1 Optional output-based NOX standard 2\nNew, firing natural gas with utilization rate \u003e45 percent \u003e850 MMBtu/h 5 ppm at 15 percent O2 or 7.9 ng/J (0.018 lb/MMBtu) 0.054 kg/MWh-gross (0.12 lb/MWh-gross) 0.055 kg/MWh-net (0.12 lb/MWh-net).\nNew, firing natural gas with utilization rate ≤45 percent and with design efficiency ≥38 percent \u003e850 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) 0.38 kg/MWh-gross (0.83 lb/MWh-gross) 0.39 kg/MWh-net (0.85 lb/MWh-net).\nNew, firing natural gas with utilization rate ≤45 percent and with design efficiency \u003c38 percent \u003e850 MMBtu/h 9 ppm at 15 percent O2 or 14 ng/J (0.033 lb/MMBtu) 0.17 kg/MWh-gross (0.37 lb/MWh-gross) 0.17 kg/MWh-net (0.38 lb/MWh-net).\nNew, modified, or reconstructed, firing non-natural gas \u003e850 MMBtu/h 42 ppm at 15 percent O2 or 70 ng/J (0.16 lb/MMBtu) 0.45 kg/MWh-gross (1.0 lb/MWh-gross) 0.46 kg/MWh-net (1.0 lb/MWh-net).\nModified or reconstructed, firing natural gas, at all utilization rates, with design efficiency ≥38 percent \u003e850 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) 0.38 kg/MWh-gross (0.83 lb/MWh-gross) 0.39 kg/MWh-net (0.85 lb/MWh-net).\nModified or reconstructed, firing natural gas, at all utilization rates, with design efficiency \u003c38 percent \u003e850 MMBtu/h 15 ppm at 15 percent O2 or 24 ng/J (0.055 lb/MMBtu) 0.28 kg/MWh-gross (0.62 lb/MWh-gross) 0.29 kg/MWh-net (0.30 lb/MWh-net).\nNew, firing natural gas, at utilization rate \u003e45 percent \u003e50 MMBtu/h and ≤850 MMBtu/h 15 ppm at 15 percent O2 or 24 ng/J (0.055 lb/MMBtu) 0.20 kg/MWh-gross (0.43 lb/MWh-gross) 0.20 kg/MWh-net (0.44 lb/MWh-net).\nNew, firing natural gas, at utilization rate ≤45 percent \u003e50 MMBtu/h and ≤850 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) 0.54 kg/MWh-gross (1.2 lb/MWh-gross) 0.56 kg/MWh-net (1.2 lb/MWh-net).\nModified or reconstructed, firing natural gas \u003e20 MMBtu/h and ≤850 MMBtu/h 42 ppm at 15 percent O2 or 67 ng/J (0.15 lb/MMBtu) 0.91 kg/MWh-gross (2.0 lb/MWh-gross) 0.92 kg/MWh-net (2.0 lb/MWh-net).\nNew, firing non-natural gas \u003e50 MMBtu/h and ≤850 MMBtu/h 74 ppm at 15 percent O2 or 120 ng/J (0.29 lb/MMBtu) 1.6 kg/MWh-gross (3.6 lb/MWh-gross) 1.6 kg/MWh-net (3.7 lb/MWh-net).\nModified or reconstructed, firing non-natural gas \u003e20 MMBtu/h and ≤850 MMBtu/h 96 ppm at 15 percent O2 or 160 ng/J (0.37 lb/MMBtu) 2.1 kg/MWh-gross (4.7 lb/MWh-gross) 2.2 kg/MWh-net (4.8 lb/MWh-net).\nNew, firing natural gas ≤50 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) 0.64 kg/MWh-gross (1.4 lb/MWh-gross) 0.65 kg/MWh-net (1.4 lb/MWh-net).\nNew, firing non-natural gas ≤50 MMBtu/h 96 ppm at 15 percent O2 or 160 ng/J (0.37 lb/MMBtu) 2.4 kg/MWh-gross (5.3 lb/MWh-gross) 2.5 kg/MWh-net (5.4 lb/MWh-net).\nModified or reconstructed, all fuels ≤20 MMBtu/h 150 ppm at 15 percent O2 or 240 ng/J (0.55 lb/MMBtu) 3.9 kg/MWh-gross (8.7 lb/MWh-gross) 4.0 kg/MWh-net (8.9 lb/MWh-net).\nNew, firing natural gas, either offshore turbines and/or turbines bypassing the heat recovery unit \u003e50 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) N/A.\nLocated north of the Arctic Circle (latitude 66.5 degrees north), operating at ambient temperatures less than 0 °F (−18 °C), modified or reconstructed offshore turbines, operated during periods of turbine tuning, byproduct-fired turbines, and/or operating at less than 70 percent of the base load rating ≤30 MW output 150 ppm at 15 percent O2 or 240 ng/J (0.55 lb/MMBtu) N/A.\nLocated north of the Arctic Circle (latitude 66.5 degrees north), operating at ambient temperatures less than 0 °F (−18 °C), modified or reconstructed offshore turbines, operated during periods of turbine tuning, byproduct-fired turbines, and/or operating at less than 70 percent of the base load rating \u003e 30 MW output 96 ppm at 15 percent O2 or 150 ng/J (0.35 lb/MMBtu) N/A.\nHeat recovery units operating independent of the combustion turbine All sizes 54 ppm at 15 percent O2 or 86 ng/J (0.20 lb/MMBtu) N/A.\nTemporary turbines firing natural gas ≤850 MMBtu/h 25 ppm at 15 percent O2 or 40 ng/J (0.092 lb/MMBtu) N/A.\nTemporary turbines firing non-natural gas ≤850 MMBtu/h 74 ppm at 15 percent O2 or 120 ng/J (0.29 lb/MMBtu) N/A.\n1 Input-based standards are determined on a 4-operating-hour rolling average basis.\n2 Output-based standards are determined on a 30-operating-day average basis.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 60—STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES","Subpart KKKKa—Standards of Performance for Stationary Combustion Turbines"],"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":"b9d22df166cec220efe555902de757716cc6dea5fe119ee1b075a520d2f9f97a","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-60.4420a","next":"us/40-cfr-table-2-to-subpart-kkkka-of-part-60"},"notice":"GroundRules: Original legal text. Not legal advice."}