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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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  • How do the different parts of particulate matter (PM) fit together?

    The various parts of PM in the NEI are related as follows. PM10-FIL > PM25-FIL because PM10-FIL includes PM25-FIL PM25-PRI = PM25-FIL + PM-CON This equation only applies at the process level. Because some sources only can report PM2.5 (due to test method differences), this equation does not apply to…

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  • How does PM2.5 relate to PM species such as EC, OC, SO4, NO3, PMFINE, and DIESEL-PM25?

    Primary PM2.5 estimates are speciated into the five PM species in the NEI: elemental (black) carbon (EC), organic carbon (OC), nitrate (NO3), sulfate (SO4), and the remainder of PM25-PRI (PMFINE). Diesel engine PM25-PRI and PM10 emissions are also labeled as DIESEL-PM25 and DIESEL-PM10 for mobile source diesel engines. For all…

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  • Do settlement communications, such as past “agreements in principle,” impact the implementation of the final Consent Decrees?

    The parties are bound by the terms of the various final, publicly available consent decrees. These consent decrees were made available for public comment before they were finalized and entered by the Court. Past settlement communications and documents created in the course of settlement discussions have been incorporated (or not)…

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  • What is the Confidentiality Order?

    The Confidentiality Order (Order) is a court order entered by the Federal District Court for the District of Montana (Court) on August 8, 2002, and amended by the Court on December 31, 2003, that applies to Superfund settlement negotiations in the Clark Fork River Basin, including the following sites: Silver…

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  • How does EPA ensure that the potentially responsible parties complete their work?

    All cleanup activities performed by the PRPs are subject to enforcement instruments (i.e., consent decrees or administrative orders) that provide for EPA approval of all deliverables and oversight of all work performed by the PRPs.

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  • How do I verify that the fees I am being asked to pay are correct?

    Answer: Click the link that applies to your application type: Firm Individual Training Provider If you still have questions, call the National Lead Information Center at 1-800-424-LEAD . Question Number: 23002-37013 Find a printable PDF copy of all frequent questions pertaining to lead .

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  • How do I know that my transaction will be secure?

    Answer: Online transactions are managed by the U.S. Department of Treasury. For more information regarding the security controls in place to protect your transactions, please visit https://pay.gov/public/home . Question Number: 23002-37016 Find a printable PDF copy of all frequent questions pertaining to lead .

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  • How does my firm become Renovation, Repair, and Painting (RRP) Certified?

    Answer : EPA's Renovation, Repair, and Painting program applies to all states, tribes and territories where EPA has not specifically provided authorization for that state, tribe or territory to operate the program themselves. Currently, there are 15 states and 1 tribe that are authorized by EPA to operate their own…

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  • How does my firm become Abatement Certified?

    Answer: EPA's Abatement program applies to all states, tribes and territories where EPA has not specifically provided authorization for that state, tribe or territory to operate the program themselves. EPA only administers the abatement program in the following states, tribes and territories: Alaska, Arizona, Florida, Idaho, Montana, Nevada, New Mexico…

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  • How do I become accredited as a Training Provider?

    Answer: Trainers seeking accreditation in an EPA administered state must submit their applications and fees online through EPA’s CDX system, the EPA’s electronic reporting system: https://cdx.epa.gov . If you have not previously created a CDX account, click “Register with CDX”, accept the terms, choose “LEAD: Lead-Based Paint Program”, and select…

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  • How do I become certified as an Individual in the Lead Abatement program?

    Answer: EPA's Abatement program applies to all states, tribes and territories where EPA has not specifically provided authorization for that state, tribe or territory to operate the program themselves. EPA only administers the abatement program in the following states, tribes and territories: Alaska, Arizona, Florida, Idaho, Montana, Nevada, New Mexico…

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  • Where can I download hourly emissions data from continuous monitoring?

    Hourly emissions data files are available from the Clean Air Markets Division of EPA, collected as part of 40 CFR Part 75. The download location has changed in February, 2023. The new location is https://campd.epa.gov/data/bulk-data-files . Once on this new site, use the menu (at the left) and the Keyword…

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  • What sources make up the Tier 1 categories used in the emissions trends?

    Tier 1 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 assignments can be downloaded from the EPA SCC website in Comma Separate Values (CSV) format.

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  • What is the cause of the large decrease in electric utility emissions, particularly sulfur dioxide, starting in 1995?

    SO2 emissions reductions from utilities during this time are primarily attributed to the impacts of the acid rain program. As described on EPA’s Acid Rain Program web page, Phase 1 of this program began in 1995 and affected 263 units at 110 most coal-burning electric utility plants in 21 eastern…

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