Air Emissions Tools
Tools for estimating air emissions and checking them against permitting thresholds.
Potential to Emit (PTE)
Convert a maximum hourly emission rate to tons per year and compare it with major source thresholds.
Open the tool →AP-42 Emission Estimate
Estimate combustion emissions from activity rate, an AP-42 emission factor, and control efficiency.
Open the tool →Emission Rate from Stack Concentration (ppm)
Calculate an emission rate in lb/hr from a ppmv concentration, molecular weight, and stack flow.
Open the tool →Emission Rate from Stack Concentration (mg/m³)
Calculate an emission rate in lb/hr from a mg/dscm concentration and stack flow.
Open the tool →VOC Mass Balance
Estimate VOC emissions from coating or solvent use, VOC content, and control efficiency.
Open the tool →More tools will be added as they become available. Use results alongside professional judgment and the requirements that apply to your site.
Built by OEMS to support practical, science-based environmental decisions.