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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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  • What are some of the health effects of lead in children?

    Answer : Lead is especially dangerous to children under six years of age. Lead can affect children's brains and developing nervous systems, causing reduced IQ and learning disabilities, and behavioral problems. Even children who appear healthy can have dangerous levels of lead in their bodies. To learn more about the…

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  • What should I do if I am concerned about my family's exposure to lead?

    Answer : A blood test is the only way to find out whether you or a family member already has lead poisoning. Call your doctor or local health department to arrange for a blood test. You can protect your family every day by: Regularly cleaning floors, window sills, and other…

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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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  • What information can I get about lead-based paint in a home before I buy or rent it?   

    Answer : Many houses and apartments built before 1978 have some lead-based paint. Lead from paint chips, and dust can pose serious health hazards if not taken care of properly. Federal law requires that individuals receive certain information before renting or buying pre-1978 housing. Sellers and landlords must: Disclose information…

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  • I thought lead-based paint had been phased out. How many homes still contain lead-based paint?

    Answer : The Department of Housing and Urban Development’s (HUD) National Survey of Lead and Allergens in Housing estimated that 38 million permanently occupied housing units (40% of all housing units) in the United States contain some lead-based paint that was applied before the residential use of lead-based paint was…

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  • What is Lead?

    Answer : Lead is a toxic metal that was used for many years in products found in and around our homes. Lead also can be emitted into the air from motor vehicles and industrial sources, and lead can enter drinking water from plumbing materials. Lead-based paint is present in many…

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  • What are some of the health effects of lead?

    Answer : Lead is known to cause a range of health effects, from behavioral problems and learning disabilities, to seizures and death. Children under six years of age are most at risk from exposure to lead-based paint because they crawl on the floor and they put their hands and other…

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  • Where is lead found?

    Answer: Many homes built before 1978 have lead-based paint. In general, the older your home, the more likely it has lead-based paint. Soil around a home can contain lead from sources like deteriorated exterior paint, past use of leaded gas in cars, or from past renovation activities. Household dust can…

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  • What is the most significant source of childhood lead exposure in a residence?

    Answer : The scientific literature suggests that nationally lead-contaminated paint dust is the most significant source of childhood lead exposure. Lead dust comes from deteriorating lead-based paint and lead-contaminated soil that gets tracked into your home. This dust may accumulate to unsafe levels. Common renovation activities like sanding, cutting, and…

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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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