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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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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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Where can I get more information or copies of the lead-based paint abatement application forms and instructions?
Answer: Information regarding certification under EPA’s lead-based paint abatement program is available at https://www.epa.gov/lead/lead-based-paint-abatement-and-evaluation-program-overview . Question Number: 23002-32438 Find a printable PDF copy of all frequent questions pertaining to lead .
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When must I take refresher training?
You must take refresher training before you apply for recertification to EPA. You should begin looking for available courses well before your current certification expires, because refresher courses may not be available in your area on a frequent basis. However, EPA recommends that you take your refresher training no earlier…
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When do persons applying for certification as inspectors, risk assessors, or supervisors apply to EPA, before or after taking the 3rd party exam?
Answer: Persons applying for certification as inspectors, risk assessors, and/or supervisors must apply to EPA before taking the 3rd party certification exam. For more information about applying for certification as a lead-based paint abatement professional please refer to EPA’s Lead-based Paint Professionals page . Question Number: 23002-33448 Find a printable…
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When individuals apply for certification in the Federal program under 40 C.F.R. 745.226(a)(1)(i), how long will the certification last?
Answer : For individuals who have taken courses which included a course test and a hands-on skills assessment, the full certification period for individuals applying under 745.226(a)(1)(i) will run for three years from the date of issuance of certification by EPA. For individuals who have taken courses which included a…
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The definition of “soil sample” at 40 CFR §745.63 relies on certain American Society of Testing Materials (ASTM) standards. Did EPA intend to prevent the use of EPA and HUD standards for soil samples?
Answer: No. In establishing work practice standards for lead-based paint activities, EPA did not intend to prevent the use of EPA/HUD standards. As a general matter, the requirements are not prescriptive but instead state that certain activities be conducted using appropriate documented methodologies. For example, §745.227(c)(3) requires that dust samples…
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How complete are the data in the National Emissions Inventory?
While the goal of the National Emissions Inventory (NEI) program is to include all emissions data, there are always challenges meeting this goal. The answer about completeness of coverage of sources depends on the emissions sector and pollutant. In general, the criteria air pollutants and precursors (CAPs) are expected to…
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Where is more information available about emissions estimation methods used by the EPA?
For criteria air pollutants and precursors as well as for hazardous air pollutants, the methods are described in the technical support document (TSD) for the latest National Emissions Inventory (NEI) available from the main NEI page . For greenhouse gas emissions, you can find greenhouse gas inventory methods from the…
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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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Can I get access to the Emissions Inventory System if I am not a data provider to EPA?
The Emission Inventory System (EIS) is a secured database for EPA and State/Local and Tribal Air Agencies only. The EIS is used to develop the National Emission Inventory (NEI). While you cannot have access to EIS, you can have access to the current and past NEIs through EPA’s NEI website…
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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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