{"data":{"id":"us/40-cfr-table-1-to-subpart-kkkk-of-part-60","jurisdiction":"us","citation":"40 CFR Table 1 to Subpart KKKK of Part 60","heading":"Table 1 to Subpart KKKK of Part 60—Nitrogen Oxide Emission Limits for New Stationary Combustion Turbines","body":"Combustion turbine type Combustion turbine heat input at peak load (HHV) NOX emission standard\nNew turbine firing natural gas, electric generating ≤50 MMBtu/h 42 ppm at 15 percent O2 or 290 ng/J of useful output (2.3 lb/MWh).\nNew turbine firing natural gas, mechanical drive ≤50 MMBtu/h 100 ppm at 15 percent O2 or 690 ng/J of useful output (5.5 lb/MWh).\nNew turbine firing natural gas \u003e50 MMBtu/h and ≤850 MMBtu/h 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).\nNew, modified, or reconstructed turbine firing natural gas \u003e850 MMBtu/h 15 ppm at 15 percent O2 or 54 ng/J of useful output (0.43 lb/MWh).\nNew turbine firing fuels other than natural gas, electric generating ≤50 MMBtu/h 96 ppm at 15 percent O2 or 700 ng/J of useful output (5.5 lb/MWh).\nNew turbine firing fuels other than natural gas, mechanical drive ≤50 MMBtu/h 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).\nNew turbine firing fuels other than natural gas \u003e50 MMBtu/h and ≤850 MMBtu/h 74 ppm at 15 percent O2 or 460 ng/J of useful output (3.6 lb/MWh).\nNew, modified, or reconstructed turbine firing fuels other than natural gas \u003e850 MMBtu/h 42 ppm at 15 percent O2 or 160 ng/J of useful output (1.3 lb/MWh).\nModified or reconstructed turbine ≤50 MMBtu/h 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).\nModified or reconstructed turbine firing natural gas \u003e50 MMBtu/h and ≤850 MMBtu/h 42 ppm at 15 percent O2 or 250 ng/J of useful output (2.0 lb/MWh).\nModified or reconstructed turbine firing fuels other than natural gas \u003e50 MMBtu/h and ≤850 MMBtu/h 96 ppm at 15 percent O2 or 590 ng/J of useful output (4.7 lb/MWh).\nTurbines located north of the Arctic Circle (latitude 66.5 degrees north); turbines operating at less than 75 percent of peak load; modified and reconstructed offshore turbines; and turbines operating at temperatures less than 0 °F ≤30 MW output 150 ppm at 15 percent O2 or 1,100 ng/J of useful output (8.7 lb/MWh).\nTurbines located north of the Arctic Circle (latitude 66.5 degrees north); turbines operating at less than 75 percent of peak load; modified and reconstructed offshore turbines; and turbines operating at temperatures less than 0 °F \u003e30 MW output 96 ppm at 15 percent O2 or 590 ng/J of useful output (4.7 lb/MWh).\nHeat recovery units operating independent of the combustion turbine All sizes 54 ppm at 15 percent O2 or 110 ng/J of useful output (0.86 lb/MWh).\nCombustion turbines bypassing the heat recovery unit firing natural gas \u003e50 MMBtu/h 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).\nTemporary turbine firing natural gas ≤850 MMBtu/h 25 ppm at 15 percent O2 or 150 ng/J of useful output (1.2 lb/MWh).\nTemporary turbine firing fuels other than natural gas ≤850 MMBtu/h 74 ppm at 15 percent O2 or 460 ng/J of useful output (3.6 lb/MWh).","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 KKKK—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":"128da65b72a92102595d81a73ee893c0588c86b7d38364bc0c2fbd6c445e91b9","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-60.4420","next":"us/40-cfr-60.4300a"},"notice":"GroundRules: Original legal text. Not legal advice."}