Science & Technology

2017-2019 Air Emissions Modeling Platforms

The 2017-2019 Version 7 emissions modeling platforms are based on 2017 NEIv2.

2019 NEI Technical Support Documentation

This is the page for the technical support document for the 2019 NEI point source category

Guidance on Regulations Issued Under the Toxic Substances Control Act (TSCA)

This page provides guidance to assist the regulated community in complying with policies or regulations that EPA has issued under the Toxic Substances Control Act (TSCA).

Steps to Safe Renovation and Repair Activities

Highlights precautionary measures and best work practices to follow when conducting a repair or renovation in older buildings where PCB-containing building material could be encountered.

Map of Superfund Enforcement Cleanup Work

Map highlights ongoing cleanup work at Superfund sites across the country as a result of the Agency's work to negotiate cleanup settlement agreements and issue orders

Superfund CLP Quality Assurance

Introductory information regarding Contract Laboratory Program Quality Assurance

Particulate Matter (PM) Air Quality Standards

The Clean Air Act requires EPA to set national ambient air quality standards (NAAQS) for six pollutants considered harmful to public health and the environment

Home EV Charger Calculator

A simple calculator meant to help users understand how much power they need to charge their EV at home.

A Closer Look: The Black Guillemots of Cooper Island

This feature provides a closer look at changes in the number of breeding pairs among a colony of birds on an island along Alaska's coast.

Climate Change Indicators: Bird Wintering Ranges

This indicator examines changes in the winter ranges of North American birds.

Climate Change Indicators: Lake Temperature

This indicator shows changes in surface water temperatures in North American lakes.

Tribal Connection: Trends in Stream Temperature in the Snake River

This feature tracks the summer water temperature of the Snake River.

Climate Change Indicators: Length of Growing Season

This indicator measures the length of the growing season in the contiguous 48 states.

Climate Change Indicators: Ragweed Pollen Season

This indicator depicts changes in the length of ragweed pollen season in the United States and Canada.

Climate Change Indicators: Snowfall

This indicator uses two different measures to show how snowfall has changed in the contiguous 48 states.

Climate Change Indicators: Great Lakes Ice Cover

This indicator measures the amount of time that ice is present on lakes in the United States.

Climate Change Indicators: Glaciers

This indicator examines the balance between snow accumulation and melting in glaciers, and it describes how glaciers around the world have changed over time.

Climate Change Indicators: Ocean Acidity

This indicator shows changes in the chemistry of the ocean that relate to the amount of carbon dissolved in the water.

A Closer Look: Land Loss Along the Atlantic Coast

This feature provides a closer look at one consequence of sea level rise along the Atlantic coast: the conversion of land to open water.

Climate Change Indicators: Sea Surface Temperature

This indicator describes global trends in sea surface temperature.