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  • Where can I find older NEI data (prior to 2008)?

    The raw data and summaries that are still available (dating back to 1990) can be obtained from the web page https://www.epa.gov/air-emissions-inventories/pollutant-emissions-summary-files-earlier-neis . Starting with 2001 data, a more limited selection of summary files are available.

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  • Purpose of Oil Pollution Prevention regulation

    What is the purpose of the Oil Pollution Prevention regulation? When oil spills into navigable waters or onto adjoining shorelines, it can have harmful impacts on the environment, human health, and economic activity. EPA issued the Oil Pollution Prevention regulation to prevent oil spills and to assure that oil facility…

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  • Will my relocation assistance end if I request indoor cleaning from EPA?

    Residents within the eligible area–the village of East Palestine and the 1-mile by 2-mile Ohio-Pennsylvania evacuation area–who request indoor cleaning through EPA are still able to receive relocation assistance. Norfolk Southern has committed to give at least a 60-day notice to people receiving relocation assistance before this assistance can end…

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  • How long will I be eligible for relocation assistance from Norfolk Southern?

    While an official end date has yet to be determined, it is expected that you would return to your home after getting it cleaned and would no longer require relocation assistance.

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  • Are biogenic emissions included in the emissions trends Tier 1 data?

    No, the biogenic emissions are not included in the emissions trends Tier 1 data. If needed, users can add the biogenic data either as a separate Tier, or specify its inclusion in the “Miscellaneous” Tier 1 group.

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  • SPCC Training Materials for Production Sector

    Does EPA offer any Spill Prevention, Control, and Countermeasure (SPCC) training materials specifically for the production sector? Yes. EPA has developed a “train-the-trainer” presentation for the production sector. The presentation provides information for organizations to hold trainings on the SPCC rule. The presentation is available in the SPCC Rule: Train-the-Trainer…

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  • What sources make up the Sectors or Tiers used in the emissions data summaries?

    Tier 1 and Sector categories are assigned by source classification codes (SCCs) that are the most specific processes available in the NEI. The latest SCC list with the Tier 1 and Sector assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.

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  • Where can I obtain the hourly data from Continuous Emissions Monitors (CEMs)?

    The CEM emissions data are available from the EPA Clean Air Markets Program Data website.

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  • How can I get more detailed information? What measurements/sensors are used to measure emissions?

    Access the latest NEI data set . Under 'Sector Summaries - Criteria and Hazardous Air Pollutants by 60 EIS emission sectors', > choose National > for Pollutant, choose PM10 Primary and/ or PM2.5-PRI > Sector, choose all sectors >Submit Query to see results at bottom of page. Open the results…

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  • Where can I get maps and/or emissions of facility emissions data?

    The EPA provides emissions maps in two ways. First, each of the last three NEI years have a “Facility Mapping” tab available on the main NEI page for that inventory year (for example, see the 2020 NEI page). With this tool, maps can be created for one state at a…

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