Common Emission Factors

The following list of emission factors and equations may be helpful in estimating emissions from emission units such as boilers, incinerators, grain facilities, chrome plating equipment, dry cleaning facilities, sterilizing equipment, and storage tanks. The factors contained herein are suggested only, and are not meant to supersede any previous factors established by permits or other references.

Natural Gas Fired Boilers

100 million BTU/hr

CO:84 lb/million cubic feet burned
CO2:120,000 lb/million cubic feet burned
Methane:2.3 lb/million cubic feet burned
N20:2.2 lb/million cubic feet burned
NH:3:3.2 lb/million cubic feet burned
NOX:280 lb/million cubic feet burned
Part:7.6 lb/million cubic feet burned
PM10:7.6 lb/million cubic feet burned
SO2:0.6 lb/million cubic feet burned
VOM:5.5 lb/million cubic feet burned

>100 million BTU/hr

CO:84 lb/million cubic feet burned
CO2:120,000 lb/million cubic feet burned
Methane:2.3 lb/million cubic feet burned
N20:2.2 lb/million cubic feet burned
NH:3:3.2 lb/million cubic feet burned
NOX:100 lb/million cubic feet burned
Part:7.6 lb/million cubic feet burned
PM10:7.6 lb/million cubic feet burned
SO2:0.6 lb/million cubic feet burned
VOM:5.5 lb/million cubic feet burned

Fuel Oil-Fired Boilers

Fuel Oil #1 or #2

CO:5 lb/1000 gallons burned
CO2:22,300 lb/1000 gallons burned
Methane:0.052 lb/1000 gallons burned
N20:0.11 lb/1000 gallons burned
NH:3:0.8 lb/1000 gallons burned
NOX:20 lb/1000 gallons burned
Part:2 lb/1000 gallons burned
PM10:1 lb/1000 gallons burned
PM2.5:1 lb/1000 gallons burned
SO2:142(S) lb/1000 gallons burned
VOM:0.252 lb/1000 gallons burned

Fuel Oil #4

CO:5 lb/1000 gallons burned
CO2:22,300 lb/1000 gallons burned
Methane:0.28 lb/1000 gallons burned
N20:0.11 lb/1000 gallons burned
NH:3:0.8 lb/1000 gallons burned
NOX:47 lb/1000 gallons burned
Part:7 lb/1000 gallons burned
PM10:6.3 lb/1000 gallons burned
PM2.5:3.9 lb/1000 gallons burned
SO2:150(S) lb/1000 gallons burned
VOM:1.04 lb/1000 gallons burned

Fuel Oil #5

CO:5 lb/1000 gallons burned
CO2:24,400 lb/1000 gallons burned
Methane:1 lb/1000 gallons burned
N20:0.26 lb/1000 gallons burned
NH:3:0.8 lb/1000 gallons burned
NOX:47 lb/1000 gallons burned
Part:10 lb/1000 gallons burned
PM10:8.6 lb/1000 gallons burned
PM2.5:No Data
SO2:157(S) lb/1000 gallons burned
VOM:1.04 lb/1000 gallons burned

Fuel Oil #6

CO:5 lb/1000 gallons burned
CO2:25,000 lb/1000 gallons burned
Methane:1 lb/1000 gallons burned
N20:0.53 lb/1000 gallons burned
NH:3:0.8 lb/1000 gallons burned
NOX:47 lb/1000 gallons burned
Part:9.19(S) + 3.22 lb/1000 gallons burned
PM10:9.19(S) + 3.22 lb/1000 gallons burned
PM2.5:4.67(A) + 3.22 lb/1000 gallons burned
SO2:157(S) lb/1000 gallons burned
VOM:0.28 lb/1000 gallons burned