Science & Technology
-
Particulate Matter (PM2.5) Trends
National and regional trends in ambient PM10 and PM2.5 concentrations.
-
Sulfur Dioxide Trends
National and regional trends in ambient SO2 concentrations.
-
Carbon Monoxide Trends
National and regional trends in carbon monoxide.
-
Previous Air Quality Trends Reports
Link to archive of historical air quality trends reports
-
Air Quality - Cities and Counties
City and County tables of air quality data - status and trends.
-
Ambient Air Toxics Trends Tool
This application is an expansion of the Air Trends Report displaying the annual ambient air toxics monitoring trends.
-
Clean Diesel Technologies, Inc. – Purifilter Plus M DPF
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
Nett Technologies, Inc.—MD300 Diesel Oxidation Catalyst (DOC)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
Clean Diesel Technologies, Inc. – AZC Purimuffler or AZC Purifier Diesel Oxidation Catalyst (DOC) plus CDTi Closed Crankcase Ventilation (CCV) System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
DonaldsonTechnology—Series 6000 Diesel Oxidation Catalyst (DOC) & Spiracle Closed Crankcase Filtration system
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
MJ EcoPower Hybrid Systems, Inc.—EcoCrane Hybrid System
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
Various Technology—Cetane Enhancers
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
Clean Diesel Technologies, Inc. – Purifilter - Diesel Particulate Filter (DPF)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
Donaldson Technology—Series 6100 Diesel Oxidation Catalyst (DOC)
This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
-
SmartWay High Performer Lists
This page contains a list of the all of the types of high performing SmartWay partners that are recognized by EPA.
-
Shared Mobility
This page is general overview of shared mobility, with explanations of carsharing, micromobility, ridehailing, and microtransit.
-
Revised Final Determination and Settlement Agreement in Genscape, Inc. v. EPA 19-3705 (6th Cir.)
9 questions about Quality Assurance Program on revoking Genscape RINs are answered.
-
Certification for Electric Motorcycles
Steps for certifying an electric nonroad motorcycle with EPA.
-
EPA Analysis of FracFocus 1 Data
The EPA conducted an analysis to better understand the chemicals and water used to hydraulically fracture oil and gas production wells in the United States and how chemical and water use vary in different locations across the country.
-
Documentation for Risk-Screening Environmental Indicators (RSEI) Geographic Microdata (RSEI-GM)
information on the RSEI Geographic Microdata, which are a unique dataset that provides detailed air model results from the RSEI model at a level of 810 meter square grid cells