Electric Utility Steam Generating Units (Boilers): New Source Performance Standards

On this page:

• Rule Summary
• Rule History
• Additional Resources

Rule Summary

Fossil fuel-fired electric utility steam generating units are boilers that are capable of combusting over 250 MMBtu/h of fossil fuel and that was constructed for the purpose of supplying more than one-third of its potential electric output capacity and more than 25 MW electrical output to any utility power distribution system for sale. The New Source Performance Standards (NSPS) for fossil fuel-fired electric utility steam generating units are outlined in the Code of Federal Regulations under 40 CFR Part 60 Subpart Da. Subpart Da covers fossil fuel-fired electric utility steam generating units that commenced constructed after September 18, 1978. The key pollutants EPA regulates from these sources includes particulate matter (PM), nitrogen oxides (NOx), and sulfur dioxide (SO₂).

Rule History

02/17/2015 - Proposed Rule (80 FR 8442)

06/25/2013 - Reopening of Comment Period (78 FR 38001)

04/24/2013 - Notice of Final Action on Reconsideration (78 FR 24073)

12/12/2012 - Extension of Public Comment Period (77 FR 73968)

11/30/2012 - Proposed Rules (77 FR 71323)

04/19/2012 - Final rule; correction (77 FR 23399)

02/16/2012 - Final rule (77 FR 9304)

05/03/2011 - Proposed Rule (76 FR 24976)

01/20/2011 - Direct Final Rule (76 FR 3517) & Proposed Rule (76 FR 3587)

07/01/2011 - Proposed Rule (76 FR 38590)

06/13/2007 - Final rule (72 FR 32710)

03/06/2007 - Extension of public comment period (72 FR 9903)

02/09/2007 - Proposed rule (72 FR 6320)

02/27/2006 - Final rule (71 FR 9866)

02/28/2005 - Proposed rule (70 FR 9706)

08/14/2011 - Removal of Modification (66 FR 42608)

06/11/2011 - Partial Withdrawal of Direct Final Rule (66 FR 31177)

04/10/2001 - Proposed Rule (66 FR 18579) & Direct Final Rule (66 FR 18546)

09/16/1998 - Final rule (63 FR 49442)

07/09/1997 - Proposed rule (62 FR 36948)

06/11/1979 - Final Rule (pdf) (22.21 MB)

09/19/1978 - Proposed Rule (pdf) (24.38 MB)

Additional Resources

View the supporting documents for the rulemakings from 2005 to 2011 docket folder to find additional related documents to these rules.

View the supporting documents for the rulemakings from 2011 to 2015 in the docket folder to find additional related documents to these rules.