Potential to Emit (PTE) Calculator
Local source-level PTE rows with AP-42, Title V, PSD/NSR, HAP, permit, and agency-review gaps visible
Free screening-level PTE calculator for boilers, engines, turbines, and other combustion sources. The app applies local emission-factor rows to entered capacity and hours, then shows uncontrolled and controlled row totals for NOx, CO, SOx, PM10, PM2.5, VOC, and CO2. Treat the output as a review worksheet before current AP-42 row selection, source testing, CEMS, HAP speciation, facility-wide aggregation, enforceable-limit review, state program rules, and agency or qualified environmental/legal review.
Aggregate reviewed source rows before facility inventory review
Facility Emissions Inventory Calculator →Review AP-42 source pointers before choosing emission factors
AP-42 Source Pointer →Review Title V fee prompts from source-supported totals
Title V Permit Fee Calculator →Estimate modification emissions before PSD/NSR review
PSD / NSR Modification Calculator →How It Works
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Select Source Prompt
Choose the closest local source row, then verify the current AP-42 chapter, section, table row, factor rating, source category, fuel data, and agency method outside the app.
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Enter Rated Capacity
Input a source-supported maximum rated capacity in MMBtu/hr for boilers and turbines, or HP for engines. Manufacturer fuel curves and permit capacity bases remain separate review items.
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Set Operating Hours
Use the annual-hours basis supported by current PTE rules, permit terms, and agency direction. The app does not decide whether a limit is federally enforceable.
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Add Control Prompts
Select a local control-efficiency prompt only when you have source-specific control, capture, monitoring, recordkeeping, and enforceable-limit support.
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Review Source Gaps
Use local threshold prompts as review flags before facility-wide aggregation, HAP speciation, nonattainment/PSD/NSR review, permit terms, and qualified environmental/legal review.
Built For
- Plant engineers organizing source-level inputs before permit or agency review
- Environmental managers checking local PTE row sensitivity before source-supported calculations
- Consultants preparing a preliminary review worksheet before formal emissions-method selection
- Operations staff documenting backup-generator or boiler assumptions for environmental follow-up
- Corporate environmental teams comparing source prompts before facility-wide inventory review
Assumptions
- Emission-factor rows are local prompts and must be checked against current AP-42, source-test, CEMS, material-balance, permit-factor, or agency methods.
- Equipment capacity, heat-rate, fuel, and annual-hour inputs are source-supported entries supplied by the user.
- Control reductions require enforceable permit terms, capture/control support, monitoring, recordkeeping, and testing before permitting use.
- Fuel composition, sulfur, HAP speciation, startup/shutdown/malfunction, and source category remain outside the local rows.
Limitations
- Does not select current AP-42 chapter/table rows or factor ratings.
- Does not calculate HAP, GHG reporting, Title V, PSD, NSR, NNSR, synthetic-minor, or state permit applicability.
- Does not perform facility-wide source aggregation, fugitive-emissions review, insignificant/de minimis screening, or common-control analysis.
- Does not replace state/local SIP rules, permit terms, agency guidance, source testing, CEMS, or qualified environmental/legal review.
References
- EPA AP-42 source pointers and current chapter review
- 40 CFR 70.2 - Part 70 definitions
- 40 CFR 51.165 and 51.166 - NNSR and PSD source pointers
- 40 CFR 52.21 - PSD federal plan source pointer