Emissions Inventory Report Services

Who Needs to File an Emissions Inventory Report?

You likely need to file an Emissions Inventory Report if your facility:

• Holds a Title V, synthetic minor, or minor source air permit that includes annual emissions reporting as a condition
• Operates in a state or local air district that requires annual or periodic emissions inventories regardless of permit type
• Has added, removed, or modified emission units since the last reporting period
• Is required to report to the EPA's National Emissions Inventory (NEI) in addition to state-level reporting

Reporting triggers, formats, and deadlines vary by state and local air agency – Vanguard confirms your facility's specific obligations as the first step.

Our Emissions Inventory Reporting Process

1. Applicability Review – We confirm which agencies (state, local, and/or EPA's NEI) require a report from your facility, and on what cycle.
2. Activity Data Collection – We gather throughput, fuel usage, hours of operation, and control equipment data for the reporting period.
3. Emissions Calculations – We calculate emissions using current EPA emission factors or approved facility-specific methods, consistent with your permit conditions.
4. Data Reconciliation – We compare calculated emissions against permit limits and prior-year submissions to catch discrepancies before filing.
5. Report Preparation & Submission – We prepare the report in the required state/local format and submit it to the appropriate agency.
6. Ongoing Compliance Calendar – We track your facility's reporting deadline alongside your air permit renewal and other environmental compliance obligations.

Why Choose Vanguard for Emissions Inventory Reporting

• We reconcile reported emissions against your permit limits before filing, reducing the risk of a flag during agency review
• Up-to-date knowledge of current EPA emission factors and state-specific calculation methods
• Ongoing tracking of your facility's specific reporting cycle and format requirements
• One point of contact alongside your air permitting and other environmental compliance obligations

Frequently Asked Questions

How do I know if my facility needs to file an Emissions Inventory Report?

It depends on your permit conditions and your state or local air agency's requirements. Vanguard confirms this as the first step of every engagement, at no obligation.

How often are Emissions Inventory Reports due?

Most are annual, though some state and local agencies use a different cycle (biennial or triennial for certain facility types). We track your facility's specific deadline as part of your compliance calendar.

What data do I need to provide?

Typically throughput or production volumes, fuel usage, hours of operation, and control equipment performance data for the reporting period. We help you gather and organize this data if it isn't already tracked in one place.

What happens if my reported emissions don't match my permit limits?

A mismatch can trigger agency follow-up questions or, in some cases, enforcement action if it suggests a permit exceedance. We reconcile this before submission to catch issues early.

Is this the same as EPA's National Emissions Inventory (NEI)?

Not exactly. State and local emissions inventory reports feed into the EPA's NEI, but the format and specific data required by your state or local agency may differ from the federal NEI dataset structure.

Can Vanguard handle this alongside our air permitting and other compliance work?

Yes. Many Vanguard clients manage emissions inventory reporting together with air permitting, RCRA, SARA, and TRI compliance under a single ongoing relationship.

Related Services

• EPA Air Permitting
• RCRA Hazardous Waste Management
• SARA Title III Reporting
• Toxic Release Inventory (TRI) Reporting
• Environmental Services