Science & Technology

2014 NATA: Assessment Results

Downloadable data files related to the 2014 National Air Toxics Assessment (NATA)

Air Quality Modeling - Surface and Upper Air Databases

Surface data are meteorological data that are measured at the earth’s surface. Upper air data are meteorological data that are measured in the vertical layers of the atmosphere.

Information for Consumers about Alternative Fuel Conversions

Here are some factors to be aware of if you are considering fuel conversion, including background information on fuel conversion, instructions for demonstrating compliance, and other related information.

Evaluation Program for Aftermarket Retrofit Devices

EPA conducts a voluntary program to evaluate aftermarket devices and fuel additives that manufacturers claim will improve fuel economy and/or reduce exhaust emissions for passenger cars and trucks.

October 19-20, 2016 Meeting of the Human Studies Review Board

Agenda, schedule, phone line, web link, and other supporting documents for the HSRB's meeting on October 19-20, 2016.

Tools and Resources

There is a wide variety of EPA-produced tools and external resources available to address air quality in your country.

Compliance Reporting for Nonroad Compression-Ignition (NRCI) Engines

Steps for compliance reporting with EPA for nonroad heavy equipment.

Compliance Reporting for Locomotives

Steps for compliance reporting with EPA for locomotives.

Compliance Reporting for Aircraft

Steps for compliance reporting with EPA for aircraft.

Quantifying Methane Emissions from Landfilled Food Waste

To understand the impact landfilled food waste has on methane emissions, EPA developed the "Quantifying Methane Emissions from Landfilled Food Waste" report and the Avoided Landfilled Food Waste Methane Emissions Calculator.

Compliance Reporting for All-Terrain Vehicles (ATVs) and Dirt Bikes

Steps for compliance reporting with EPA for ATVs.

Certification for Snowmobiles

Steps for certifying snowmobiles with EPA.

Massachusetts - 2017 Annual Network Plan

Network plan provides framework for establishment and maintenance of air quality surveillance system for the state of Massachusetts.

Air Toxics Methods Documents

This page contains links to associated documents linked to on main Air Toxics monitoring page.

PM2.5 Monitoring Network - Documents

Files for the PM2.5 Monitoring Network Page

Photochemical Assessment Monitoring Stations (PAMS) - Model Quality Assurance Project Plan

This guidance and the following two attachments represent templates for consideration for implementation plans for the (1) Required Monitoring Network PAMS site and (2) for the EMPs required for moderate or higher nonattainment areas

Certification for All-Terrain Vehicles (ATVs) and Dirt Bikes

Steps for certifying ATVs with EPA.

April 27, 2017 Meeting of the Human Studies Review Board

Materials to support the HSRB meeting on April 27, 2017: includes meeting agenda and a background paper on mosquito repellent testing.

Air Modeling Resources from Selected Agencies and Organizations

Air Modeling Related Links

Air Modeling - Observational Meteorological Data

Observed meteorological data for use in air quality modeling consist of physical parameters that are measured directly by instrumentation, and include temperature, dew point, wind direction, wind speed, cloud cover, cloud layer(s), ceiling height,