Linn County Air Quality Division
Skip Navigation LinksHome > Regulations > Boilers and Process Heaters

Boilers and Process Heaters



The Iowa Department of Natural Resources has not adopted the National Emission Standards for Hazardous Air Pollutants (NESHAP) for Industrial, Commercial, and Institutional Boilers for Major or Area Sources; therefore, Linn County has not adopted these NESHAPs. Although these federal regulations have not been adopted at a state or local level, facilities with equipment subject to these subparts are still required to comply with the standards and management practices promulgated by the EPA. The following is a short list of resources owners or operators of facilities subject to these rules can use to maintain compliance. This should not be considered a comprehensive list of compliance requirements. For more information, see the EPA Clean Air Act Standards and Guidelines for Energy, Engines, and Combustion.

New EPA Regulations for
Industrial, Commercial, and Institutional Boilers
and Process Heaters (Major Sources)
40 CFR Part 63, Subpart DDDDD (NESHAP 5D)

FINAL RULE (eCFR | PDF File)
NESHAP 5D Fact Sheet (PDF File)
NESHAP 5D FAQ (PDF File)

NESHAP 5D Initial Notification Form - January 31, 2013 (PDF File)

Note: Facilities that already submitted an initial notification for the Major Source Boiler MACT promulgated on March 21, 2011, are not required to submit another initial notification at this time. Facilities that have not submitted an initial notification since the "old" Boiler MACT (promulgated in 2004) will need to submit a new notification.

New EPA Regulations for
Industrial, Commercial, and Institutional Boilers (Area Sources)
40 CFR Part 63, Subpart JJJJJJ (NESHAP 6J)

FINAL RULE (eCFR | PDF File)
NESHAP 6J Fact Sheet (PDF File)

NESHAP 6J Compliance for Industrial, Commercial, and Institutional Area Source Boilers (EPA Website)

The Area Source Boiler NESHAP does not apply to process heaters, and it does not apply to "gas-fired boilers," as defined in NESHAP 6J: Gas-fired boiler includes any boiler that burns gaseous fuels not combined with any solid fuels and burns liquid fuel only during periods of gas curtailment, gas supply interruption, startups, or periodic testing on liquid fuel. Periodic testing of liquid fuel shall not exceed a combined total of 48 hours during any calendar year.


SHARE: