Science & Technology

Texas plants habitat photos

Endangered Species Protection Bulletins set forth geographically specific pesticide use limitations for the protection of threatened and endangered (listed) species and their designated critical habitat.

Framework to Assess Eye Irritation or Corrosion in New Chemicals

EPA’s decision framework for identifying eye irritation or corrosion hazards for new chemicals reviewed under TSCA provides a standard approach for the Agency to use when evaluating new chemicals for potential eye irritation or corrosion hazards.

SPECIATE Documentation

This page links to the PDF called "The development and uses of EPA’s SPECIATE database"

EPA Research Partner Support Story: Improved Understanding of the Current Science regarding PFAS

Technical resources including fact sheets, a web-based technical and regulatory guidance document, and online training materials for improved understanding of the science of PFAS.

EPA Research Partner Support Story: Improving the value of participatory science data in environmental decisions

Effectively using participatory science data in environmental decisions

TASMANIA C-CLENZ

Technical product bulletin: this surface washing agent is suitable for use in oil cleanups on shoreline, beaches and rocks..

Summary of Oklahoma's Water Reuse Guideline or Regulation for Industry Process Water for Centralized Non-potable Reuse

Oklahoma (State Regulation) | Source water: Treated municipal wastewater | End use: Centralized non-potable water reuse

Exceptional Events Documents SO2 - Kona, HI

PDF documents associated with SO2 exceptional events for Kona, HI.

Do all AQI plots use the most current AQI breakpoints - regardless of which year you request?

Yes, every AQI summary from AirData is based on the current AQI breakpoints, regardless of year. See 40 CFR Part 58 Appendix G and the AQI Technical Assistance Document for details. Return to Frequent Questions about AirData

Last published: July 15, 2025

How is the AQI calculated?

Refer to the AQI Technical Assistance Document for equations on how to calculate the AQI from pollutant concentration. Return to Frequent Questions about AirData