Science & Technology

Presidential Green Chemistry Challenge: 2010 Greener Synthetic Pathways Award

Presidential Green Chemistry Challenge 2010 award winners, Dow and BASF, jointly developed a route to make propylene oxide from hydrogen peroxide that eliminates almost all waste and greatly reduces water and energy use.

Point-of-Use/Point-of-Entry Cost Estimating Tool

WBS model for cost estimating POU and POE drinking water treatment systems.

Draft Contaminant Candidate List 6 - CCL 6

Learn about EPA's Contaminant Candidate List 6 (CCL 6)

Presidential Green Chemistry Challenge: 2004 Greener Synthetic Pathways Award

Presidential Green Chemistry Challenge 2004 award winner, Bristol-Myers Squibb, manufactures paclitaxel, the active ingredient in the anticancer drug, Taxol, using plant cell fermentation and extraction to replace synthesis.

Presidential Green Chemistry Challenge: 2012 Designing Greener Chemicals Award

Presidential Green Chemistry Challenge 2012 award winner, Buckman International, developed Maximyze enzymes that modify the cellulose in wood fibers to increase binding between fibers in paper and improve paper strength.

Presidential Green Chemistry Challenge: 2002 Greener Synthetic Pathways Award

Presidential Green Chemistry Challenge 2002 award winner, Pfizer, improved its synthesis of sertraline, the active ingredient in its drug, Zoloft, to double the yield and reduce the use of raw materials, energy, and water.

Section 3: HRS Structure

Read about the the four pathways for evaluating a Hazard Ranking System (HRS) score: ground water migration, surface water migration, soil exposure, and air migration.

EPA’s Research Vessel Lake Guardian Begins Annual Sampling of Great Lakes

On April 4, U.S. Environmental Protection Agency’s (EPA’s) largest research vessel, the R/V Lake Guardian, began its annual water quality monitoring of the Great Lakes. The data collected help EPA and partner agencies assess ecosystem stressors...

• Release Date: April 7, 2026

Exposure Assessment Tools by Media - Air

EPA ExpoBox is a toolbox for exposure assessors. Its purpose is to provide a compendium of exposure assessment and risk characterization tools that will present comprehensive step-by-step guidance and links to relevant exposure assessment data bases

Requirements for SmartWay Verification of Idling Reduction Technologies (IRTs) for Trucks

Before applying for SmartWay verification of your IRT, there are some important considerations and requirements to review.

Evaluation for SmartWay Verification of Idling Reduction Technologies (IRTs) for Trucks

The evaluation process is the fourth and final part of the SmartWay verification process for Idle Reduction Technologies (IRTs) for Trucks.

Technology-Specific Information for SmartWay Verification of Idling Reduction Technologies (IRTs) for Trucks

Providing technology-specific information is the third part in the five-step process for SmartWay verification of IRTs for Trucks.

Overview of the SmartWay Verification Process for Idling Reduction Technologies (IRTs) for Locomotives

EPA's SmartWay Verification Program evaluates the ability of IRTs to decrease main engine idling in locomotives in order to save fuel and reduce emissions.

Requirements for SmartWay Verification of Idling Reduction Technologies (IRTs) for Locomotives

Before applying for SmartWay verification of your IRT, there are some important considerations and requirements to review.

Technology-Specific Information for SmartWay Verification of Idling Reduction Technologies (IRTs) for Locomotives

Providing technology-specific information is the third part in the five-step process for SmartWay verification of IRTs for Locomotives.

List of Idling Reduction Technologies (IRTs) that are Eligible for the Federal Excise Tax Exemption

This list shows products that are currently eligible for Federal Excise Tax Exemption.

List of Idling Reduction Technologies (IRTs) that are No Longer Eligible for the Federal Excise Tax Exemption

This list shows products that are NO LONGER eligible for Federal Excise Tax Exemption.

Formerly SmartWay Verified List of Idling Reduction Technologies (IRTs) for Trucks

This list shows IRTs that are NO LONGER SmartWay Verified.

Learn About Idling Reduction for Locomotives

This page provides information about reducing idling for locomotives.

Learn About Idling Reduction Technologies (IRTs) for Trucks and School Buses

This page provides information about SmartWay Verified idling reduction technologies (IRTs) for trucks.