Emission Factor Calculation

\[EF=\frac{E}{A}\]

Variables

EFemisemission factor (mass/activity unit)

Epollpollutant emissions (mass)

Actactivity level (activity unit)

Description

What is this formula?

This formula calculates an emission factor from measured emissions and the corresponding activity level.

When to use it

Use it when developing site-specific emission factors for industrial facilities, vehicles, combustion systems, environmental inventories, and regulatory studies.

Example

Data:

Epoll = 180 kg

Act = 6000 L fuel

Formula:

EF = E/A

Substitution:

EF = 180/6000

Result:

EF = 0.03 kg/L

Applications

Emission inventories, source characterization, regulatory reporting, environmental permitting, sustainability assessments, and greenhouse gas accounting.

Note

Emission factors are empirical quantities derived from measurements. Their values depend on fuel composition, technology, operating conditions, maintenance practices, and sampling methodology. Regulatory agencies may publish standardized factors that differ from site-specific values.